CN103117930A - Method and device for detecting static route configuration - Google Patents

Abstract

Embodiments of the present invention provide a static routing configuration detection method and device. The method includes: the router receives configuration information of the static route, and the configuration information includes a destination IPv6 address and a next-hop IPv6 address. The router searches for a neighbor cache entry matching the next-hop IPv6 address. If no neighbor cache entry matching the next-hop IPv6 address is found, a first neighbor solicitation message is sent. The target address of the first neighbor solicitation message is a next-hop IPv6 address, and the destination address is a request node multicast address corresponding to the next-hop IPv6 address. The router determines whether a first Neighbor Advertisement message in response to the first Neighbor Solicitation message is received within a first preset time. If the first neighbor advertisement message in response to the first neighbor solicitation message is not received within the first preset time, the static route is set to be inactive. The embodiments of the present invention can improve the reliability of static route configuration.

Description

Method and device for detecting static routing configuration

technical field

The embodiment of the present invention relates to network routing technology, and in particular to a detection method and device for static routing configuration.

Background technique

At present, Internet communication has begun to use Internet Protocol Version 6 (Internet Protocol Version 6, hereinafter abbreviated as IPv6). IPv6 is the next-generation IP protocol designed by the Internet Engineering Task Force (IETF) to replace the current version of IPv4.

An IPv6-based network consists of hosts and routers, and Layer 3 traffic on the network is forwarded through routing information. Routing is the most fundamental element in a data communication network. Routing information is the path information that guides packet forwarding, and the routing process is the process of packet relay and forwarding. The router saves the routing table and forwarding information base (Forwarding Information Base, hereinafter abbreviated as FIB). The router guides packet forwarding through the FIB. The routes discovered by various routing protocols are stored in the routing table. According to different sources, the routes in the routing table can generally be divided into the following three categories: routes discovered by link layer protocols, also known as interface routes or direct routes; Static routes manually configured by administrators; and routes discovered by dynamic routing protocols.

Static routing is a special routing that needs to be manually configured by the administrator. It is mostly used in scenarios with a relatively simple network structure. For example, a static route includes the following elements: 1) destination address and mask; 2) outgoing interface or next-hop IPv6 address. The outbound interface is the port pointing to the next-hop IPv6 address of the device. The static router can also be configured to iterate the outbound interface with the next-hop IPv6 address. The actual functions of the two are the same. For example, "ipv6route-static33::3641::2", where 33::3 is the destination address, 64 is the mask, and 1::2 is the address of the next-hop router. Unlike dynamic routing protocols, static routing has no detection mechanism of its own. When a network failure occurs, administrator intervention is required. In addition, if the administrator misconfigures, there may be communication problems, such as misconfigured static routes or link problems. In the prior art, a static route is manually bound to a Bidirectional Forwarding Detection (BFD) session to detect the status of the link where the static route is located. error.

Contents of the invention

Embodiments of the present invention provide a static routing configuration detection method and device, so as to improve the reliability of the static routing configuration and reduce the workload of manual configuration.

In the first aspect, a method for detecting static routing configuration is provided. The method includes: the router receives configuration information of the static route, and the configuration information includes a destination IPv6 address and a next-hop IPv6 address. The router searches for a neighbor cache entry matching the next-hop IPv6 address. If no neighbor cache entry matching the next-hop IPv6 address is found, a first neighbor solicitation message is sent. The target address of the first neighbor solicitation message is the next-hop IPv6 address, and the destination address is a request node multicast address corresponding to the next-hop IPv6 address. The router determines whether a first Neighbor Advertisement message in response to the first Neighbor Solicitation message is received within a first preset time. If the first neighbor advertisement message in response to the first neighbor solicitation message is not received within the first preset time, the static route is set to be inactive.

According to the first aspect, a first possible implementation manner is provided. The method further includes: if the first Neighbor Advertisement message in response to the first Neighbor Solicitation message is received within the first preset time, and the target address carried in the first Neighbor Advertisement message is the If the next-hop IPv6 address is specified, the static route is set active.

According to the first aspect or the first possible implementation manner of the first aspect, a second possible implementation manner is provided. The method further includes: if the router finds a neighbor cache entry matching the next-hop IPv6 address, and the state of the neighbor cache entry is reachable, setting the static route active.

According to the first aspect or the first or second possible implementation manner of the first aspect, a third possible implementation manner is provided. The method further includes: if the router finds a neighbor cache entry matching the next-hop IPv6 address, and the state of the neighbor cache entry is not reachable, sending a second neighbor solicitation message through an outbound interface, the The target address of the second neighbor solicitation message is the next-hop IPv6 address, and the destination address is the next-hop IPv6 address. If no second neighbor advertisement message in response to the second neighbor solicitation message is received within a second preset time, the static route is set to be inactive.

According to the third implementation manner of the first aspect, a fourth possible implementation manner is provided. The method further includes: if a second Neighbor Advertisement message in response to the second Neighbor Solicitation message is received within a second preset time, the target address carried in the second Neighbor Advertisement message is the next-hop IPv6 address, set the static route active.

According to the first aspect or any one of the foregoing implementation manners of the first aspect, a fifth possible implementation manner is provided. The method further includes: when the router receives a message requesting to delete the neighbor cache entry corresponding to the static route, the router sends a third neighbor solicitation message through the outbound interface, and the target of the third neighbor solicitation message is The address is the next-hop IPv6 address, and the destination address is the next-hop IPv6 address. If a third Neighbor Advertisement message in response to the third Neighbor Solicitation message is received within a third preset time, and the target address carried in the third Neighbor Advertisement message is the next-hop IPv6 address, then omitting to perform deletion The operation of the neighbor cache entry keeps the static route active. If no third neighbor advertisement message in response to the third neighbor solicitation message is received within the third preset time, the neighbor cache entry is deleted, and the static routing setting is inactive.

According to the first aspect or any one of the foregoing implementation manners of the first aspect, a sixth possible implementation manner is provided. The method further includes: periodically sending a fourth neighbor solicitation message, the target address of the fourth neighbor solicitation message is the next-hop IPv6 address, and the destination address is the next-hop IPv6 address. If a fourth Neighbor Advertisement message in response to the fourth Neighbor Solicitation message is received within a fourth preset time, the static route is set to be active. If a neighbor advertisement message in response to the fourth neighbor solicitation message is not received within a fourth preset time, the static route is set to be inactive.

According to the first aspect or any one of the foregoing implementation manners of the first aspect, a seventh possible implementation manner is provided. The configuration information also includes the outgoing interface and matching length.

According to the first aspect or any one of the first to sixth implementation manners of the first aspect, an eighth possible implementation manner is provided. When the configuration information does not include an outbound interface, the router iterates out the outbound interface of the static route according to the next-hop IPv6 address.

The second aspect provides a detection device for static routing configuration, including: a receiving module, configured for a router to receive static routing configuration information, the configuration information including at least a destination IPv6 address and a next-hop IPv6 address; a search module, configured for The router searches for a neighbor cache entry matching the next-hop IPv6 address; a sending module, configured to send a first neighbor solicitation message if no neighbor cache entry matching the next-hop IPv6 address is found. The target address of the first neighbor solicitation message is the next-hop IPv6 address, and the destination address is the request node multicast address corresponding to the next-hop IPv6 address; the determining module is configured to determine that within the first preset time Whether a first neighbor advertisement message in response to the first neighbor request message is received; a state module is set, for if the first neighbor advertisement message in response to the first neighbor request message is not received within the first preset time , then set the static route inactive.

According to the second aspect, a first possible implementation manner is provided. The setting state module is further configured to: if a first neighbor notification message in response to the first neighbor request message is received within a first preset time, and the target address carried in the first neighbor notification message is the If the next-hop IPv6 address is specified, the static route is set active.

According to the second aspect or the first implementation manner of the second aspect, a second possible implementation manner is provided. The setting state module is further configured to: if the router finds a neighbor cache entry matching the next-hop IPv6 address, and the state of the neighbor cache entry is reachable, then set the static route active.

According to the second aspect or the first or second implementation manner of the second aspect, a third possible implementation manner is provided. The sending module is further configured to: if the router finds a neighbor cache entry matching the next-hop IPv6 address, and the state of the neighbor cache entry is not reachable, send a second neighbor solicitation message through an outgoing interface, The target address of the second neighbor solicitation message is the next-hop IPv6 address, and the destination address is the next-hop IPv6 address. The determining module is further configured to determine whether a second neighbor notification message in response to the second neighbor request message is received within a second preset time. The setting status module is further configured to: set the static route to be inactive if no second neighbor advertisement message in response to the second neighbor solicitation message is received within a second preset time.

In combination with the third possible implementation manner of the second aspect, a fourth possible implementation manner is provided. The setting state module is further configured to: if the second neighbor notification message in response to the second neighbor request message is received within the second preset time, the target carried in the second neighbor notification message address is the next hop IPv6 address, then set the static route to be active.

According to the second aspect or any of the foregoing implementation manners of the second aspect, a fifth possible implementation manner is provided. The receiving module is further configured to receive a message requesting to delete the neighbor cache entry corresponding to the static route. The sending module is further configured to send a third neighbor solicitation message through an outgoing interface, the target address of the third neighbor solicitation message is the next-hop IPv6 address, and the destination address is the next-hop IPv6 address. The determining module is further configured to determine whether a third neighbor notification message in response to the third neighbor request message is received within a third preset time. The device further includes: an omitting deletion module, configured to receive a third neighbor notification message in response to the third neighbor request message within a third preset time, and the target address carried in the third neighbor notification message is For the next-hop IPv6 address, the operation of deleting the neighbor cache entry is omitted, and the static route is kept active. The device also includes: a deletion module, configured to delete the neighbor cache entry if a third neighbor notification message in response to the third neighbor request message is not received within the third preset time, and set The static route is not active.

According to the second aspect or any of the foregoing implementation manners of the second aspect, a sixth possible implementation manner is provided. The sending module is further configured to: periodically send a fourth neighbor solicitation message, the target address of the fourth neighbor solicitation message is the next-hop IPv6 address, and the destination address is the next-hop IPv6 address. The determining module is further configured to determine whether a fourth Neighbor Advertisement message in response to the fourth Neighbor Solicitation message is received within a fourth preset time. The setting status module is further configured to: if a neighbor notification message in response to the fourth neighbor solicitation message is received within a fourth preset time, then set the static route to be active, if within the fourth preset time If no Neighbor Advertisement message is received in response to the fourth Neighbor Solicitation message, the static route is set to be inactive.

According to the second aspect or any of the foregoing implementation manners of the second aspect, a seventh possible implementation manner is provided. The configuration information also includes the outgoing interface and matching length.

According to the second aspect or any one of the first to sixth implementation manners of the second aspect, an eighth possible implementation manner is provided. The device further includes: an iteration module, configured to, when the configuration information does not include the outbound interface, the router iterate out the outbound interface of the static route according to the next-hop IPv6 address.

In the method and device for detecting static routing configuration provided by the embodiments of the present invention, a router receives static routing configuration information, and the configuration information includes a next-hop IPv6 address. The router searches for a neighbor cache entry matching the next-hop IPv6 address, if no neighbor cache entry matching the next-hop IPv6 address is found, then sends a first neighbor solicitation message, if within the first preset time If no first neighbor response message is received in response to the first neighbor solicitation message, the static route is set active. The solutions of the embodiments of the present invention can automatically discover static routing configuration errors or link problems, improve the reliability of static routing configuration, and reduce the workload of manual configuration.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained according to these drawings without any creative effort.

Fig. 1 is the flowchart of the detection method of static routing configuration in one embodiment of the present invention;

Fig. 2 is the flowchart of the detection method of static routing configuration in another embodiment of the present invention;

FIG. 3 is a schematic diagram of networking in Scenario 1 applicable to the embodiment of the present invention;

FIG. 4 is a schematic diagram of networking in Scenario 2 applicable to the embodiment of the present invention;

FIG. 5 is a schematic diagram of networking in scenario three applicable to the embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a detection device for static routing configuration in an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a detection device for static routing configuration in another embodiment of the present invention;

FIG. 8 is a schematic structural diagram of a detection device for static routing configuration in an embodiment of the present invention;

Fig. 9 is a schematic structural diagram of a router provided by another embodiment of the present invention.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

The detection method of the static routing configuration in the embodiment of the present invention may be executed by a detection device, and the detection device may be integrated in a router.

There are static routes configured in this router. Static routes refer to routes manually configured by administrators. When the network topology or link status changes, the administrator needs to manually modify the relevant static routing information in the routing table. For example, static routing information is private by default and will not be passed on to other routers. Therefore, the use of static routing has high network security and confidentiality. Of course, the administrator can also make it shared by setting up the router. Static routing is generally applicable to a relatively simple network environment. In such an environment, administrators can easily understand the topology of the network and set correct routing information.

For example, the next hop of router A (address 1::1/64) is router B (address 1::2/64), and the packet needs to be forwarded to the destination address 33::3 through router B The administrator needs to configure a routing information of "ipv6route-static33::3641::2" on router A. This static routing information determines the path of packet forwarding from router A to router B, and then router B Forward to the host with the destination address 33::3.

This embodiment provides a detection scheme for the above static routing, and the method of this embodiment may include:

The detection device performs neighbor cache entry learning based on the next-hop IPv6 address in the static route configured in the router;

Among them, Neighbor Discovery (Neighbor Discovery, hereinafter abbreviated as ND) is a set of messages and processes to determine the relationship between neighbor nodes. The IPv6 Neighbor Discovery Protocol replaces the IPv4 Address Resolution Protocol (Address Resolution Protocol, hereinafter abbreviated as ARP), Internet Control Message Protocol Router Discovery (ICMPRouter Discovery) and ICMP Redirect (Redirect) messages, and provides other functions.

For a node, after configuring an IPv6 address, it first determines whether the address is available and does not conflict. When a node is a host, the router needs to inform the host of the ideal next-hop IPv6 address to forward the message to a specific destination address; when a node is a router, it needs to publish its own address, address prefix and other configuration parameters to guide the host to perform parameters configuration. During the IPv6 message forwarding process, the node needs to determine the correspondence between the Media Access Control (Media Access Control, hereinafter abbreviated as MAC) address of the neighbor node and the IPv6 address of the neighbor node and its reachability. The neighbor cache includes the correspondence between the MAC address of the neighbor node and the IPv6 address of the neighbor node.

Specifically, in the above example, the next-hop IPv6 address configured in the static route is the IPv6 address of router B. For another example, the configuration information of the static route may include an outbound interface. After router A configures a static route, it searches the neighbor cache to determine whether the neighbor cache entry matching the next-hop IPv6 address exists. If it is determined that the neighbor cache entry matching the next-hop IPv6 address does not exist, the address for neighbor discovery. The detection device sets the state of the static route, such as active or inactive, according to the result of the neighbor discovery. For example, if it is determined that the neighbor cache entry matching the next-hop IPv6 address exists and the state is reachable, the static route is set active.

The above technical solution will be described in detail below using several specific embodiments.

FIG. 1 is a flow chart of a detection method for static routing configuration in an embodiment of the present invention. As shown in FIG. 1 , it includes 101. A router receives configuration information of a static routing. For example, the configuration information includes a destination IPv6 address and a next-hop IPv6 address. Optionally, the configuration information may also include an outbound interface and a matching length. Optionally, when the configuration information does not include the outbound interface, the router iterates out the outbound interface according to the next-hop IPv6 address.

102. The router searches for a neighbor cache entry matching the next-hop IPv6 address.

For example, the router stores a neighbor cache, where the neighbor cache includes at least one neighbor cache entry, and the at least one neighbor cache entry includes an IPv6 address and a corresponding outgoing interface of a neighbor device of the router.

103. If no neighbor cache entry matching the next-hop IPv6 address is found, send a first neighbor solicitation message (Neighbor Solicitation message), where the target address of the first neighbor solicitation message is the next-hop IPv6 address address, and the destination address is the solicited-node multicast address corresponding to the next-hop IPv6 address corresponding to the next-hop IPv6 address.

104. The router determines whether a first neighbor advertisement message (Neighbor Advertisement message) in response to the first neighbor solicitation message is received within a first preset time.

105. If no response to the first neighbor advertisement message is received within the first preset time, set the static route to be inactive.

FIG. 2 is a flow chart of a detection method for static routing configuration in another embodiment of the present invention. Compared with the method shown in FIG. A neighbor solicitation message, determining whether the first neighbor advertisement message is received within the first preset time. If the first neighbor advertisement message is received within the first preset time, perform 106, set the static route active. Optionally, the time interval for repeatedly sending the first neighbor solicitation message may be incremented. For example, initially, after 1 second, the first neighbor solicitation message is sent for the second time. If the first neighbor notification message is not received within the first preset time, the first neighbor request message is sent for the third time after 10 seconds. If the first neighbor notification message is still not received within the first preset time, the first neighbor request message is sent for the third time after 20 seconds, and so on. This method of repeatedly performing neighbor discovery in a time-incremental manner can save resources

The static routing configuration detection method provided by the embodiment of the present invention is to search for a neighbor cache entry matching the next-hop IPv6 address when configuring a static route for the router, if no neighbor cache matching the next-hop IPv6 address is found table entry, neighbor discovery is performed, and if no neighbor notification message is received within the preset time, the static route is set to be inactive. The embodiment of the present invention can realize the automatic detection of the static route configuration, can improve the reliability of the static route configuration, and reduce the workload of manual configuration.

Optionally, in the foregoing embodiment, after receiving the first neighbor notification message, a first neighbor cache entry is created, and a correspondence between the first neighbor cache entry and the static route is stored. Optionally, if a first Neighbor Advertisement message in response to the first Neighbor Solicitation message is received within the first preset time, the target address carried in the first Neighbor Advertisement message is the next-hop IPv6 address, set the static route active.

Optionally, the method described in the foregoing embodiment may further include: if the router finds a neighbor cache entry that matches the next-hop IPv6 address and the outbound interface, and the state of the neighbor cache entry is reachable ( reachable), then set the static route active. Optionally, the router stores the correspondence between the matching neighbor cache entry and the static route. For example, the configuration information of the static route includes the outbound interface. For another example, when the configuration information of the static route does not include the outbound interface, the routing device iterates out the outbound interface according to the next-hop IPv6 address.

Optionally, the method described in the foregoing embodiment may further include: if the router finds a neighbor cache entry that matches the next-hop IPv6 address and the outgoing interface, and the state of the neighbor cache entry is not available If reachable, then send a second neighbor solicitation message through the outbound interface, where the target address of the second neighbor solicitation message is the next-hop IPv6 address, and the destination address is the next-hop IPv6 address. If the second neighbor advertisement message in response to the second neighbor solicitation message is not received within the second preset time, the static route is set to be inactive. Optionally, if a second Neighbor Advertisement message in response to the second Neighbor Advertisement message is received within a second preset time, the target address carried in the second Neighbor Advertisement message is the next-hop IPv6 address, Then set the static route active. Optionally, the router stores the correspondence between the matching neighbor cache entry and the static route.

For example, the second preset time may be the same as or different from the first preset time.

Optionally, the method described in the foregoing embodiment may further include: periodically sending a fourth neighbor solicitation message, where the target address of the fourth neighbor solicitation message is the next-hop IPv6 address, and the destination address is the next-hop IPv6 address. A hop IPv6 address, if a fourth Neighbor Advertisement message in response to the fourth Neighbor Solicitation message is received within a fourth preset time, the static route is set to be active, if not received within a fourth preset time and setting the static route inactive until a fourth neighbor advertisement message in response to the fourth neighbor solicitation message. For example, when the static route is deleted, the operation of periodically sending the fourth neighbor solicitation message is omitted.

The static route configuration detection method provided by the embodiment of the present invention can automatically detect static route configuration errors or link problems by performing neighbor discovery table entry learning when the neighbor cache entry does not exist when configuring static routes for the router, and improving The reliability of traffic forwarding is improved.

Optionally, the method described in the foregoing embodiments may further include: when the router receives a message requesting to delete the neighbor cache entry corresponding to the static route, the router sends a third neighbor solicitation message through the outbound interface , the target address of the third neighbor solicitation message is the next-hop IPv6 address, and the destination address is the next-hop IPv6 address. If a third Neighbor Advertisement message in response to the third Neighbor Solicitation message is received within the third preset time, and the target address carried in the third Neighbor Advertisement message is the next-hop IPv6 address, omit Execute the operation of deleting the neighbor cache entry to keep the static route active. Optionally, if a third neighbor notification message in response to the third neighbor solicitation message is not received within the third preset time, the neighbor cache entry is deleted, and the static route is set to be inactive.

By adopting the above solution, it is possible to prevent the static route from being deleted by mistake, and improve the usability of the static route.

The following uses several specific application scenarios as examples to further describe the embodiment shown in FIG. 2 in detail.

Fig. 3 is a schematic diagram of the networking of Scenario 1 applicable to the embodiment of the present invention. As shown in Fig. 3, this embodiment illustrates that if a problem occurs in a certain segment of the networking link, the method of the embodiment of the present invention is used It can effectively avoid the occurrence of flow failure.

Specifically, in the network shown in Figure 3, the router RTA, router RTB, and router RTC are connected through a Layer 2 switch. When the link between the switch and the RTB fails, the interface connected to the RTA and the switch cannot be detected. When a static route is configured on the RTA, and the next hop is the address of the RTB, the embodiment of the present invention can search the neighbor cache according to the IPv6 address of the router RTB to determine whether there is a matching neighbor cache entry when configuring the static route. Matching neighbor cache table entry, then send neighbor solicitation message, this moment, because the link problem between switch and RTB, can not receive the neighbor notification message that responds to described neighbor solicitation message, then set static route inactive. The inactive route will not be delivered to the FIB entry, so that the data flow will not be transmitted through the failed path.

Figure 4 is a schematic diagram of the networking of the second scenario applicable to the embodiment of the present invention. Occurrence of flow interruption.

Specifically, in the network shown in Figure 4, the router RTA and the router RTB are connected through a dual link, wherein a link address of the router RTA is 1:2::1/64, the outgoing interface Ethernet1/0/0 is connected to the address of the router RTB 1:2::2/64, the outgoing interface Ethernet1/0/1 is connected, another link address of the router RTA is 2:1::1/64, the outgoing interface Ethernet2/0/0 is connected to the router RTB address 2:1 ::2/64 and outgoing interface Ethernet2/0/1 are connected. If the administrator configures the static route on the RTA due to an operation error and configures the wrong next hop and outbound interface, the configuration is as follows:

ipv6 route-static 1:2::264Ethernet 1/0/0 2:1::2

In the embodiment of the present invention, by searching the neighbor cache and performing neighbor discovery, such errors can be found to avoid interruption of data stream transmission. In the existing technical solution, after configuring a static route, the static route will be used to guide packet forwarding, and there is no detection of whether the configured static route is reachable, because the outbound interface Ethernet1/0/0 and the next-hop IPv6 address 2 :1::2 is not connected, causing the data flow to be interrupted.

FIG. 5 is a schematic diagram of networking in scenario 3 applicable to the embodiment of the present invention. Specifically, in the networking shown in FIG. 5 , the router RTA is connected to the router RTB, and the router RTB is connected to the host with the destination address 33::3/64. If a static route to the destination address 33::3 is configured on RTA:

ipv6 route-static 33::3 64 1::2

The embodiment of the present invention will search the neighbor cache to determine whether the neighbor cache entry matching the next-hop IPv6 address exists when configuring the static route, and if not, perform neighbor discovery and receive the neighbor responding to the neighbor request message within the preset time When notifying a message, set the static route to be active, but in the prior art, after the static route is configured on the RTA, the configured static route will be sent to the FIB to guide the packet forwarding, and the traffic arriving at 33::3 will be introduced. The learning of the 1::2 ND entry is triggered by the traffic after the traffic is introduced. Therefore, the traffic before the ND entry is learned is discarded. However, in the embodiment of the present invention, since the ND entry has been learned before receiving the data stream, no packet loss will occur.

FIG. 6 is a schematic structural diagram of an apparatus for detecting a static routing configuration in an embodiment of the present invention, which can execute the method for detecting a static routing configuration provided in the above-mentioned embodiment, and the apparatus can be integrated in a router. As shown in FIG. 6, the device of the embodiment of the present invention includes: a receiving module 61, configured to receive configuration information of a static route, where the configuration information includes at least a destination IPv6 address and a next-hop IPv6 address;

A search module 62, configured to search for a neighbor cache entry matching the next-hop IPv6 address;

Sending module 63, configured to send a first neighbor solicitation message if no neighbor cache entry matching the next-hop IPv6 address is found, and the target address of the first neighbor solicitation message is the next-hop IPv6 address , the destination address is the solicited node multicast address corresponding to the next-hop IPv6 address;

A determination module 64, configured to determine whether a first neighbor notification message in response to the first neighbor request message is received within a first preset time;

The setting status module 65 is configured to set the static route to be inactive if the first neighbor notification message in response to the first neighbor solicitation message is not received within the first preset time.

The device in this embodiment can be used to execute the static routing configuration detection method provided in the above embodiments. For implementation details of each operation, please refer to the method embodiment, which will not be repeated here.

The detection device for static routing configuration provided by the embodiment of the present invention receives configuration information of static routing, searches for a matching neighbor cache entry, and performs neighbor discovery if no matching neighbor cache entry is found. If no first neighbor advertisement message is received in response to the first neighbor solicitation message within a time period, the static route is set to be inactive. Therefore, this solution can automatically discover static route configuration errors or link problems, improve the reliability of static route configuration, and reduce the workload of manual configuration.

Optionally, the setting status module 65 is further configured to: if the first neighbor advertisement message in response to the first neighbor solicitation message is received within the first preset time, and the first If the target address carried in the neighbor notification message is the next-hop IPv6 address, the static route is set to be active.

Optionally, the setting state module 65 is further configured to: if the router finds a neighbor cache entry matching the next-hop IPv6 address, and the state of the neighbor cache entry is reachable, then set the The above static route is active.

Optionally, the sending module 63 is further configured to: if the router finds a neighbor cache entry matching the next-hop IPv6 address, and the state of the neighbor cache entry is not reachable, send the first Two Neighbor Solicitation messages, the target address of the second Neighbor Solicitation message is the next-hop IPv6 address, and the destination address is the next-hop IPv6 address.

The determining module 64 is further configured to determine whether a second neighbor notification message in response to the second neighbor request message is received within a second preset time.

The setting status module 65 is further configured to: set the static route to be inactive if no second neighbor notification message in response to the second neighbor solicitation message is received within a second preset time.

Optionally, the setting status module 65 is further configured to: if the second neighbor notification message in response to the second neighbor request message is received within the second preset time, the second neighbor The target address carried in the notification message is the next-hop IPv6 address, and the static route is set active.

FIG. 7 is a schematic structural diagram of a detection device for static routing configuration in another embodiment of the present invention. Compared with the device shown in FIG. 6 above, the device shown in FIG. 7 may further include:

A trigger module 66, configured to: when a neighbor cache entry matching the next-hop IPv6 address exists and the state is not reachable, or when no response to the first neighbor request is received within the first preset time When the first Neighbor Advertisement message of the message is sent, the sending module 63 is triggered to repeatedly send the first Neighbor Solicitation message.

For example, wherein, the trigger module 66 is specifically configured to: when the neighbor cache entry of the next-hop IPv6 address exists, and the state is not reachable, or when the first preset time does not receive When the first neighbor notification message in response to the first neighbor request message is reached, the sending module 63 is triggered to repeatedly send the first neighbor request message in a time-increasing manner.

Optionally, the sending module 63 is also used for:

periodically sending a fourth neighbor solicitation message, the target address of the fourth neighbor solicitation message is the next-hop IPv6 address, and the destination address is the next-hop IPv6 address;

The determining module 64 is further configured to determine whether a fourth neighbor notification message in response to the fourth neighbor request message is received within a fourth preset time.

The setting status module 65 is further configured to: if a fourth neighbor notification message in response to the fourth neighbor solicitation message is received within a fourth preset time, then set the static route to be active, if within the fourth preset time If the fourth neighbor notification message in response to the fourth neighbor request message is not received within the set time, the static route is set to be inactive.

The device shown in FIG. 7 can be used to execute the detection method for the static routing configuration provided in the above embodiment. For the implementation details of each operation, please refer to the method embodiment, which will not be repeated here.

Fig. 8 is a schematic structural diagram of a detection device for static route configuration in an embodiment of the present invention. Compared with the device shown in Fig. 7, the device shown in Fig. 8 is further configured to receive a request to delete the corresponding static route Information about neighbor cache entries. The sending module 63 is further configured to send a third neighbor solicitation message through the outgoing interface, the target address of the third neighbor solicitation message is the next-hop IPv6 address, and the destination address is the next-hop IPv6 address.

The determining module 64 is further configured to determine whether a third neighbor notification message in response to the third neighbor request message is received within a third preset time.

Omitting the deletion module 67, configured to receive a third Neighbor Advertisement message in response to the third Neighbor Solicitation message within a third preset time, and the target address carried in the third Neighbor Advertisement message is the next hop IPv6 address, omit the operation of deleting the neighbor cache entry corresponding to the static route, and keep the static route active.

The deletion module 68 is configured to delete the neighbor cache entry corresponding to the static route if the third neighbor notification message in response to the third neighbor request message is not received within the third preset time, and set the The above static route is not active.

The device shown in FIG. 8 performs neighbor discovery when receiving a message requesting to delete a neighbor cache entry corresponding to a static route, which can prevent the route from being deleted by mistake and ensure the availability of the route.

Optionally, as shown in FIG. 8, the sending module 63 in the devices of the above embodiments includes a first sending unit 631 and a second sending unit 632, wherein:

The first sending unit 631 is configured to send the first neighbor solicitation message when the neighbor cache entry matching the next-hop IPv6 address does not exist, and the target address of the first neighbor solicitation message is the A next-hop IPv6 address, and the destination address is a request node multicast address corresponding to the next-hop IPv6 address.

The second sending unit 632 is configured to send a second neighbor solicitation message through the outbound interface when the neighbor cache entry matching the next hop IPv6 address exists and the state is not reachable, and the second neighbor solicitation message is The target address is the next-hop IPv6 address, and the destination address is the next-hop IPv6 address.

The device shown in FIG. 8 can prevent the static route from being deleted by mistake, and improve the usability of the static route.

Optionally, the configuration information of the static route also includes an outgoing interface and a matching length.

Optionally, the device shown in Figure 8 also includes:

An iteration module 69, configured to iterate out the outbound interface of the static route according to the next-hop IPv6 address when the configuration information of the static route does not include the outbound interface.

The device shown in FIG. 8 can be used to execute the detection method for static routing configuration provided in the above embodiment. For the implementation details of each operation, please refer to the method embodiment, which will not be repeated here.

In summary, the static routing configuration detection method and device provided by the embodiments of the present invention can receive static routing configuration information and perform neighbor discovery, which can automatically detect static routing configuration errors or link problems, and can improve the reliability of static routing configuration. performance and reduce the workload of manual configuration.

Fig. 9 is a schematic structural diagram of a router provided by another embodiment of the present invention, the router includes at least one processor 901, at least one network interface 902, memory 903, and at least one communication bus 904, for realizing connection and communication between devices . The processor 901 is used to execute instructions stored in the memory 903 . For example, the memory 903 may include a high-speed random access memory (RAM: Random Access Memory), and may also include a non-volatile memory (non-volatile memory), such as at least one disk memory. The communication connection between the router and other routers or hosts is implemented through at least one network interface 902 .

In some implementations, the memory 903 stores a program 905, and the program 905 can be executed by the processor 901. The program includes executing a static routing configuration detection method, the method includes: receiving static routing configuration information, the configuration information Include at least the destination IPv6 address and the next hop IPv6 address. The router searches for a neighbor cache entry matching the next-hop IPv6 address. If no neighbor cache entry matching the next-hop IPv6 address is found, a first neighbor solicitation message is sent, the target address of the first neighbor solicitation message is the next-hop IPv6 address, and the destination address is the corresponding Specifies the solicited node multicast address of the next-hop IPv6 address. If the first neighbor advertisement message in response to the first neighbor solicitation message is not received within the first preset time, the static route is set to be inactive.

Optionally, the above procedure 905 may further include: if the first neighbor notification message in response to the first neighbor request message is received within the first preset time, and the first neighbor notification message carries If the destination address is the next-hop IPv6 address, then set the static route to be active.

Optionally, the above procedure 905 may further include: if a neighbor cache entry matching the next-hop IPv6 address is found, and the state of the neighbor cache entry is reachable, setting the static route active.

Optionally, the above 905 may also include: if a neighbor cache entry matching the next-hop IPv6 address is found, and the state of the neighbor cache entry is not reachable, sending a second neighbor solicitation message through the outbound interface, so The target address of the second neighbor solicitation message is the next-hop IPv6 address, and the destination address is the next-hop IPv6 address. If no second neighbor advertisement message in response to the second neighbor solicitation message is received within a second preset time, the static route is set to be inactive.

Optionally, the above procedure 905 may further include: if a second neighbor notification message in response to the second neighbor request message is received within a second preset time, the target address carried in the second neighbor notification message is the If the next-hop IPv6 address is specified, the static route is set active.

Optionally, the above procedure 905 further includes: when receiving a message requesting to delete the neighbor cache entry corresponding to the static route, sending a third neighbor solicitation message through the outbound interface, and the destination address of the third neighbor solicitation message is The next-hop IPv6 address, and the destination address is the next-hop IPv6 address. If a third Neighbor Advertisement message in response to the third Neighbor Solicitation message is received within a third preset time, and the target address carried in the third Neighbor Advertisement message is the next-hop IPv6 address, then omitting to perform deletion The operation of the neighbor cache entry keeps the static route active. If the third neighbor advertisement message in response to the third neighbor solicitation message is not received within the third preset time, delete the neighbor cache entry and set the static route to be inactive.

Optionally, the above procedure 905 may also include: periodically sending a fourth Neighbor Solicitation message, the target address of the fourth Neighbor Solicitation message is the next-hop IPv6 address, and the destination address is the next-hop IPv6 address . If a fourth Neighbor Advertisement message in response to the fourth Neighbor Solicitation message is received within a fourth preset time, the static route is set active; If the fourth Neighbor Advertisement message of the four Neighbor Solicitation messages is used, the static route is set to be inactive.

Optionally, the configuration information of the static route also includes an outgoing interface and a matching length.

Optionally, the above procedure 905 may further include, when the configuration information does not include the outbound interface, iterating out the outbound interface of the static route according to the next-hop IPv6 address.

Those of ordinary skill in the art can understand that all or part of the steps for implementing the above method embodiments can be completed by program instructions and related hardware. The aforementioned program can be stored in a computer-readable storage medium. When the program is executed, it executes the steps including the above-mentioned method embodiments; and the aforementioned storage medium includes: ROM, RAM, magnetic disk or optical disk and other various media that can store program codes.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the embodiments of the present invention, not to limit them; although the embodiments of the present invention have been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art It should be understood that it is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the embodiments of the present invention. The scope of the technical solutions of each embodiment.

Claims (18)

1. A detection method for static routing configuration, characterized in that, comprising: The router receives the configuration information of the static route, and the configuration information includes a destination IPv6 address and a next-hop IPv6 address; The router searches for a neighbor cache entry matching the next-hop IPv6 address; If no neighbor cache entry matching the next-hop IPv6 address is found, a first neighbor solicitation message is sent, the target address of the first neighbor solicitation message is the next-hop IPv6 address, and the destination address is the corresponding The solicited node multicast address of the next-hop IPv6 address; The router determines whether a first Neighbor Advertisement message in response to the first Neighbor Solicitation message is received within a first preset time; If the first neighbor advertisement message in response to the first neighbor solicitation message is not received within the first preset time, the static route is set to be inactive. 2. The method according to claim 1, further comprising: if the first neighbor notification message in response to the first neighbor solicitation message is received within the first preset time, and the If the destination address carried in the first neighbor advertisement message is the next-hop IPv6 address, then set the static route to be active. 3. The method according to claim 1 or 2, further comprising: if the router finds a neighbor cache entry matching the next-hop IPv6 address, and the state of the neighbor cache entry is available up, set the static route active. 4. The method according to any one of claims 1-3, further comprising: If the router finds a neighbor cache entry matching the next-hop IPv6 address, and the state of the neighbor cache entry is not reachable, then send a second neighbor solicitation message through the outbound interface, and the second neighbor solicitation message of the second neighbor solicitation message The target address is the next-hop IPv6 address, and the destination address is the next-hop IPv6 address; If no second neighbor advertisement message in response to the second neighbor solicitation message is received within a second preset time, the static route is set to be inactive. 5. The method according to claim 4, further comprising: If the second Neighbor Advertisement message in response to the second Neighbor Solicitation message is received within the second preset time, the target address carried in the second Neighbor Advertisement message is the next-hop IPv6 address, Then set the static route active. 6. The method according to any one of claims 1-5, further comprising: When the router receives a message requesting to delete the neighbor cache entry corresponding to the static route, the router sends a third neighbor solicitation message through an outbound interface, and the destination address of the third neighbor solicitation message is the next Jump IPv6 address, destination address is described next hop IPv6 address; If a third Neighbor Advertisement message in response to the third Neighbor Solicitation message is received within a third preset time, and the target address carried in the third Neighbor Advertisement message is the next-hop IPv6 address, then omitting to perform deletion The operation of the neighbor cache entry corresponding to the static route keeps the static route active; If the third neighbor advertisement message in response to the third neighbor solicitation message is not received within the third preset time, delete the neighbor cache entry corresponding to the static route, and set the static route not to active. 7. The method according to any one of claims 1-6, further comprising: periodically sending a fourth neighbor solicitation message, the target address of the fourth neighbor solicitation message is the next-hop IPv6 address, and the destination address is the next-hop IPv6 address; If a fourth Neighbor Advertisement message in response to the fourth Neighbor Solicitation message is received within a fourth preset time, the static route is set active; If the fourth Neighbor Advertisement message of the four Neighbor Solicitation messages is used, the static route is set to be inactive. 8. The method according to any one of claims 1-7, wherein the configuration information further includes an outgoing interface and a matching length. 9. The method according to claim 1-7, wherein when the configuration information does not include an outbound interface, the router iterates out the outbound interface of the static route according to the next-hop IPv6 address. 10. A detection device for static routing configuration, characterized in that, comprising: A receiving module, configured to receive configuration information of a static route, the configuration information including a destination IPv6 address and a next-hop IPv6 address; A search module, configured to search for a neighbor cache entry matching the next-hop IPv6 address; A sending module, configured to send a first neighbor solicitation message if no neighbor cache entry matching the next-hop IPv6 address is found, where the target address of the first neighbor solicitation message is the next-hop IPv6 address, The destination address is a request node multicast address corresponding to the next-hop IPv6 address; A determining module, configured to determine whether a first neighbor notification message in response to the first neighbor request message is received within a first preset time; A setting status module, configured to set the static route to be inactive if the first neighbor advertisement message in response to the first neighbor solicitation message is not received within a first preset time. 11. The device according to claim 10, wherein the setting state module is also used for: If the first Neighbor Advertisement message in response to the first Neighbor Solicitation message is received within the first preset time, and the target address carried in the first Neighbor Advertisement message is the next-hop IPv6 address, then Set the static route active. 12. The device according to claim 10 or 11, wherein the setting state module is also used for: If a neighbor cache entry matching the next-hop IPv6 address is found, and the state of the neighbor cache entry is reachable, then set the static route to be active. 13. The device according to any one of claims 10-12, characterized in that, The sending module is also used for: if a neighbor cache entry matching the next-hop IPv6 address is found, and the state of the neighbor cache entry is not reachable, then send a second neighbor solicitation message through the outgoing interface, and the first The target address of the second neighbor solicitation message is the next-hop IPv6 address, and the destination address is the next-hop IPv6 address; The determination module is further configured to determine whether a second neighbor notification message in response to the second neighbor request message is received within a second preset time; The setting status module is further configured to: set the static route to be inactive if the second neighbor notification message in response to the second neighbor solicitation message is not received within a second preset time. 14. The device according to claim 13, wherein the setting state module is also used for: If the second Neighbor Advertisement message in response to the second Neighbor Solicitation message is received within the second preset time, the target address carried in the second Neighbor Advertisement message is the next-hop IPv6 address, Then set the static route active. 15. The device according to any one of claims 10-14, characterized in that, The receiving module is further configured to receive a message requesting to delete the neighbor cache entry corresponding to the static route; The sending module is further configured to send a third neighbor solicitation message through an outgoing interface, the target address of the third neighbor solicitation message is the next-hop IPv6 address, and the destination address is the next-hop IPv6 address; The determining module is further configured to determine whether a third neighbor notification message in response to the third neighbor request message is received within a third preset time; The device also includes: Omitting the deletion module, configured to receive a third Neighbor Advertisement message in response to the third Neighbor Solicitation message within a third preset time, and the target address carried in the third Neighbor Advertisement message is the next-hop IPv6 address, the operation of deleting the neighbor cache entry corresponding to the static route is omitted, and the static route is kept active; A deletion module, configured to delete the neighbor cache entry corresponding to the static route if the third neighbor notification message in response to the third neighbor request message is not received within the third preset time, and set The static route is not active. 16. The device according to any one of claims 10-15, characterized in that, The sending module is further configured to: periodically send a fourth neighbor solicitation message, the target address of the fourth neighbor solicitation message is the next-hop IPv6 address, and the destination address is the next-hop IPv6 address; The determining module is further configured to determine whether a fourth Neighbor Advertisement message in response to the fourth Neighbor Solicitation message is received within a fourth preset time; The setting status module is also used for: if a fourth neighbor advertisement message in response to the fourth neighbor solicitation message is received within a fourth preset time, then set the static route to be active; otherwise, set the static route Inactive. 17. The device according to claims 10-16, wherein the configuration information further includes an outbound interface and a matching length. 18. The device according to claims 10-16, further comprising: An iteration module, configured to iterate out the outbound interface of the static route according to the next-hop IPv6 address when the configuration information does not include an outbound interface.

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