CN102209001A - Ethernet linear protection method and device - Google Patents
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Abstract
The invention provides an Ethernet linear protection method and an Ethernet linear protection device. The method comprises that: a source and a sink are connected by an active link in a first virtual local area network (VLAN), and are connected by a protective link in a second VLAN; the source and the sink perform service transmission by the active link in the first VLAN; and if the source and/or the sink determine/determines a forwarding failure of the active link in the first VLAN, the source and the sink perform the service transmission by the protective link in the second VLAN. By the method and the device, flexible networking between the source and the sink can be supported.
Description
Technical field
The present invention relates to the linear resist technology of Ethernet field, linear guard method of particularly a kind of Ethernet and device.
Background technology
Characteristics such as ethernet technology has simply, efficient and low cost have obtained developing rapidly in metropolitan area network and wide area network networking technology, and still, the integrity problem of traditional ethernet also becomes the key factor of its large scale deployment in metropolitan area network of restriction.For this reason, International Telecommunications Union's telecommunication standards tissue (ITU-T) has proposed linear protection of Ethernet (G.8031) and Ethernet looped network protection (G.8032).The linear protection of Ethernet is the linear wrap protection of a kind of end-to-end Ethernet based on Virtual Local Area Network; each work transmission entity has the protection transmission entity of a special use; be used to protect an Ethernet to connect; if one of them transmission entity breaks down, then can continue to use another transmission entity to carry out the business transmission.Referring to Fig. 1; Fig. 1 is that structural representation is switched in the linear protection of prior art Ethernet; the source end of protected field and Su Duanjun need pass through two link access networks; wherein; solid line connects the active link between expression source end and the Su Duan; also promptly carry the link of the work transmission entity of an Ethernet connection, dotted line connects the protection link between expression source end and the Su Duan, also promptly carries the link of the protection transmission entity of this Ethernet connection.
G.8031 two kinds of linear protection switching structures of 1+1 and 1:1 have been defined in the agreement.In the 1+1 mode, the source of protected field forever be bridged to active link and the protection link; Service message is sent to the egress of protected field on the link simultaneously in active link and protection, egress based on predetermined criterion selective reception from the service message on active link or the protection link.In the 1:1 mode, service message only transmits at active link or protection link, is determined by the selection bridge of the source of protected field.Hence one can see that, in existing Ethernet linear protection mechanism, is by being selected only to send service message on a link by the source end, and Su Duan receives service message and realizes professional the transmission on corresponding link; Or the source end simultaneously sends message on two links, realizes professional transmission by the service message that end decision in place receives wherein on the link.
Because the active link in the protected field and protection link are in same VLAN, if in this protected field, implement STP, then according to the STP agreement, can remove active link and the loop of protecting link to form between source and the egress, thereby destroy the protection that protected field connects Ethernet, for fear of this problem occurring, G.8031 clear must adopt as shown in Figure 2 first kind of the prior art networking schematic diagram that is used of agreement and STP G.8031 in the agreement, closes STP in protected field; Or adopt as shown in Figure 3 the prior art second networking schematic diagram that is used of agreement and STP G.8031; source and egress do not enable STP; only the intermediate equipment on active link and protection link enables STP, and enables the intermediate equipment of STP on the active link and protect the intermediate equipment that enables STP on the link to keep apart fully.
In addition and since protected field in active link and the protection link in same VLAN, source end and Su Duanjun need use two ports; by two link access networks; and active link and protection link can not insert same intermediate equipment, otherwise, loop problem can appear.For example, suppose also to have an intermediate equipment M between the source and egress in Fig. 1, active link and protection link all insert M, then can be between device A and M, and form loop between M and the B.G.8031 agreement can't solve this loop problem.As seen, in the present Ethernet cable protection, active link and protection link must be mutually independently, the networking underaction between source and the egress.
Summary of the invention
In view of this, the object of the present invention is to provide the linear guard method of a kind of Ethernet, this method can be supported the flexible networking between source end and the Su Duan.
In order to achieve the above object, the invention provides the linear guard method of a kind of Ethernet, this method comprises:
The source end links to each other by active link in first virtual LAN VLAN with Su Duan, links to each other by the protection link in the 2nd VLAN;
Source end and Su Duan carry out the business transmission by active link in a VLAN;
Source end and/or place end determine that fault takes place to transmit active link in a VLAN, then source end and Su Duan carry out the business transmission by the protection link in the 2nd VLAN.
The present invention also provides a kind of device that is applied to the linear protection of Ethernet, and this device links to each other with the place end with the protection link by active link for the source end in the linear protection of Ethernet, described source end; This device comprises: link unit, packet sending and receiving unit;
The link unit is used for connecting egress by active link in a VLAN; In the 2nd VLAN, pass through protection link connection egress;
The packet sending and receiving unit is used for carrying out business transmission at a VLAN with egress by active link, if determine active link fault takes place in a VLAN to transmit, and then carries out business transmission with egress by the protection link in the 2nd VLAN.
The present invention also provides a kind of device that is applied to Ethernet cable protection, and this device is the egress in the Ethernet cable protection, and described egress links to each other with source with the protection link by active link; This device comprises: link unit, packet sending and receiving unit;
The link unit is used for connecting source by active link in a VLAN; In the 2nd VLAN, pass through protection link connection source;
The packet sending and receiving unit is used for carrying out business transmission at a VLAN with the source end by active link, transmits fault if determine active link in a VLAN, then carries out business transmission with the source end by the protection link in the 2nd VLAN.
By top technical scheme as can be known, the linear guard method of this Ethernet of the present invention can be supported the flexible networking between source end and the Su Duan.
Description of drawings
Fig. 1 is that structural representation is switched in the linear protection of prior art Ethernet;
Fig. 2 is the G.8031 networking schematic diagram that is used of agreement and STP of first kind of prior art;
Fig. 3 is the G.8031 networking schematic diagram that is used of agreement and STP of second kind of prior art;
Fig. 4 is the flow chart of the linear guard method of the Ethernet that provides of the embodiment of the invention;
Fig. 5 is the Ethernet cable protection networking schematic diagram that source and egress are passed through two link access networks;
Fig. 6 is the linear protection of the Ethernet networking schematic diagram that adopts the aggregated links access network;
Fig. 7 is the linear protection of the Ethernet networking schematic diagram that adopts the single-link access network;
Fig. 8 adopts the 1:1 protection to switch the Ethernet cable protection method flow diagram that structure realizes in networking shown in Figure 5;
Fig. 9 adopts the 1:1 protection to switch the Ethernet cable protection method flow diagram that structure realizes in networking shown in Figure 6;
Figure 10 adopts the 1:1 protection to switch the Ethernet cable protection method flow diagram that structure realizes in networking shown in Figure 7;
Figure 11 adopts 1+1 protection to switch the linear protection method flow diagram that structure realizes in networking shown in Figure 5;
Figure 12 adopts 1+1 protection to switch the linear protection method flow diagram that structure realizes in networking shown in Figure 6;
Figure 13 adopts 1+1 protection to switch the linear protection method flow diagram that structure realizes in networking shown in Figure 7;
Figure 14 is the structural representation that is applied to the source in the Ethernet cable protection;
Figure 15 is the structural representation that is applied to the Su Duan in the linear protection of Ethernet.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer, below in conjunction with the accompanying drawing embodiment that develops simultaneously, the present invention is described in detail.
Referring to Fig. 4, Fig. 4 is the flow chart of the linear guard method of the Ethernet that provides of the embodiment of the invention, and this method may further comprise the steps:
In a VLAN, carry out the business transmission by active link between step 402, source and the egress, fault in a VLAN, occurs transmitting if source and/or egress are determined active link, then the business transmission is switched among the 2nd VLAN of protection link.
Connective and the connectedness of detection protection link in the 2nd VLAN in a VLAN in this step source or egress testing link.Source or egress self detect active link and fault occurs transmitting in VLAN, determine that then fault appears transmitting in active link in a VLAN; Perhaps, after source or egress self detect active link fault occurs transmitting in a VLAN, send the corresponding signalling trouble of transmitting to the opposite end, make the opposite end determine that according to the forwarding signalling trouble of receiving the forwarding fault appears in active link in a VLAN.Source and/or egress determine that by similar mode fault appears transmitting in the protection link in the 2nd VLAN.
Here; in a VLAN, carry out the business transmission by active link between source end and the Su Duan; if fault appears transmitting in active link in a VLAN, and protect link fault in the 2nd VLAN, to occur transmitting, then the business transmission is switched on the 2nd VLAN of protection link.
In addition; if detect active link between source end and the Su Duan in a VLAN and the protection link link failure all appears in the 2nd VLAN; then source end or place end also need further report network to interrupt; for example; can interrupt to network management system by report network the forwarding failure condition of notice network management system active link and protection link.
In actual applications, after the transmission of the business between source and the egress is carried out the business transmission by the protection link, if the active link fault recovery; relate to also whether switchback is to active link; and when switchback arrives active link etc., can adopt existing mode to realize, repeats no more.
In the said method; active link transmits data respectively with the protection link in two different VLAN; in protected field, implement the STP agreement if desired; can be by two different VLAN being mapped in the different STP example in a STP territory; and then can the supportive protection territory and any mixed networking in STP territory, realize the coexistence of protected field and STP territory.Therefore, this method further comprises: source and egress are configured in the same STP territory, and a VLAN and the 2nd VLAN are mapped to respectively in the different STP example in this STP territory, so that this protected field can coexist with the STP territory.Here, the method in source and egress configuration stp territory, and can adopt existing mode to implement the method that a VLAN and the 2nd VLAN are mapped to respectively different STP examples.
Here, need to prove, STP general reference STP, RSTP (RSTP), the Multiple Spanning Tree Protocol (MSTP) mentioned among the present invention, only when VLAN was mapped to the STP example, described STP was meant MSTP.
In the implementation method shown in Figure 4, the data of active link and the different VLAN of protection link transmission can not cause loop.Therefore, source device A and egress equipment B not only can be passed through two single-link/aggregated links access networks, also can a single-link or an aggregated links access network.
Referring to Fig. 5, Fig. 5 is that prior art source end and Su Duan protect the networking schematic diagram by the Ethernet linearity of two single-link access networks.Wherein, the source device A is by two single-link A1 and A2 access network, and the egress equipment B is by two single-link B1 and B2 access network; The source device A can arrive the egress equipment B by two link A1-B1 and A2-B2; The source device A is identified work transmission entity and the protection transmission entity that Ethernet connects according to the port one by link A1-B1 with the port 2 that is connected link A2-B2, and equipment B is identified work transmission entity and the protection transmission entity that Ethernet connects according to the port 3 by link A1-B1 with the port 4 that is connected link A2-B2.
Source end device A can be discerned the work transmission that Ethernet is connected by VLAN1 and VLAN2 with place end equipment B.During the operator planning network, can plan simultaneously " linear protection network " and " STP protecting network ", the two can be disposed simultaneously, has guaranteed " continuity " of the network planning, and the STP protecting network can be by because of the linear protection Network Isolation.
Referring to Fig. 6, Fig. 6 is the linear protection of the Ethernet networking schematic diagram that the present invention adopts the aggregated links access network, and source end device A is by aggregated links X1X2 access network, and place end equipment B is by aggregated links Y1Y2 access network.In addition, equipment M1 and M2 are intermediate equipments, only need to support that forwarding capability gets final product.Intermediate equipment M1 links to each other by aggregated links X1X2 with the source device A, and intermediate equipment M2 links to each other by aggregated links Y1Y2 with the egress equipment B; Link to each other by two links between intermediate equipment M1 and the M2; two links between intermediate equipment M1 and the M2 can also insert the 3rd intermediate equipment jointly; because when in protected field, carrying out the business transmission; in VLAN separately, to transmit; therefore, can not produce loop because of common the 3rd intermediate equipment of access.
In implementation process, dispose the source device A by existing mode, allow the data of VLAN1 and VLAN2 to transmit at aggregated links X1X2; Dispose the egress equipment B by same existing mode, allow the data communication device of VLAN1 and VLAN2 to cross aggregated links Y1Y2 forwarding, the link X1X2-Y1Y2 that the source device A arrives the egress equipment B is divided into respectively VLAN1 and VLAN2, so that link X1X2-Y1Y2 can transmit the service message of VLAN1 and VLAN2.
The logical links that link X1X2-Y1Y2 forwarding VLAN1 service message consists of has realized that the source device A links to each other by active link in VLAN1 with the egress equipment B; The logical links that the service message of link X1X2-Y1Y2 forwarding VLAN2 consists of has realized that the source device A links to each other by the protection link in VLAN2 with the egress equipment B.
By the VLAN label of the vlan data that transmits at link X1X2-Y1Y2 distinguish be link X1X2-Y1Y2 current be as active link transport service message or as protection link transmission service message, and then identification Ethernet the work transmission entity and the protection transmission entity that connect.
During the operator planning network, can plan " linear protection network " and " STP protecting network " simultaneously, guarantee " continuity " of the network planning, the STP protecting network can be by because of the linear protection Network Isolation.If intermediate equipment M1 and M2 are in the carrier network; then carrier network only needs the data connection of two VLAN at maintenance work link and protection link place to get final product; the device just of carrier network will possess different forwarding capabilitys, and does not need to have special defencive function.
Source device A or egress equipment B are that user's side joint of access carrier network enters equipment; then the device just of carrier network will provide a port (single port or polymerization) to be used for connecting source device A or egress equipment B; realize link protection in source device A or egress equipment B, alleviate the burden of operator's equipment.
Referring to Fig. 7, Fig. 7 is the linear protection of the Ethernet networking schematic diagram that the present invention adopts the single-link access network, and source end device A is by single link AA access network, and place end equipment B is by single link BB access network.In addition, equipment M1 and M2 are intermediate equipments, only need to support that forwarding capability gets final product.
Intermediate equipment M1 links to each other by the AA link with the source device A, and intermediate equipment M2 links to each other by link BB with the egress equipment B; Link to each other by two links between intermediate equipment M1 and the M2; two links between intermediate equipment M1 and the M2 can also insert the 3rd intermediate equipment jointly; because when in protected field, carrying out the business transmission; in VLAN separately, to transmit; therefore, can not produce loop because of common the 3rd intermediate equipment of access.
In implementation process, dispose the source device A by existing mode, allow the data of VLAN1 and VLAN2 to transmit at link AA; Dispose the egress equipment B by same existing mode, allow the data communication device of VLAN1 and VLAN2 to cross link BB forwarding, the link AA-BB that the source device A arrives the egress equipment B is divided into respectively VLAN1 and VLAN2, and the logical links that the service message of link AA-BB forwarding VLAN1 consists of has realized that the source device A links to each other by active link in VLAN1 with the egress equipment B; The logical links that the service message of link AA-BB forwarding VLAN2 consists of has realized that the source device A links to each other by the protection link in VLAN2 with the egress equipment B.Promptly; the VLAN label that the link AA-BB that arrives place end equipment B B by source end device A A goes up the vlan data of transmission distinguish be link AA-BB current be as the active link transport service or as protection link transmission business, and then identification Ethernet the work transmission entity and the protection transmission entity that connect.
In addition, implementation method of the present invention shown in Figure 4 both had been applicable to that 1:1 protection switched structure, was applicable to that also 1+1 protection switches structure.Respectively the realization act specific embodiment that the present invention switches structure two kinds of protections is elaborated below in conjunction with Fig. 5,6,7.
Shown in Figure 8 is that the embodiment of the invention one adopts the 1:1 protection to switch the linear guard method of Ethernet that structure realizes in networking shown in Figure 5 to may further comprise the steps:
In this step, after VLAN1 and the VLAN2, source device A and egress equipment B are joined by active link in VLAN1, link to each other by the protection link in VLAN2 with link A1-B1 and link A2-B2 graduation.In the VLAN that two links are divided into separately, during the transmission of data, can not produce loop.
Here, because the transmission means that adopts the 1:1 protection to switch service message in the structure, the source device A is passed through active link or protection link transport service message in different VLAN from the egress equipment B.The source device A sends service message by active link A1-B1 in VLAN1, the egress equipment B can allow the message of VLAN1 and abandon the message of VLAN2 by ACL (access control lists), thereby the egress equipment B receives service message by active link A1-B1 in VLAN1.
In this step, when active link A1-B1 in VLAN1 link failure did not take place, the source device A sent service message by active link in VLAN1, and the egress equipment B receives service message by active link A1-B1 in VLAN1.
Source device A and egress equipment B continue to detect connectedness and link A2-B2 the connectedness among VLAN2s of link A1-B1 in VLAN1.
In this step, when if source end device A detects the active link generation forwarding fault of carrying out professional transmission, determine that then fault appears transmitting in link A1-B1 in VLAN1 and, make place end equipment B determine that fault takes place to transmit the active link of transport service message in VLAN1 according to this notice with this event notice place end equipment B.Vice versa, and the egress equipment B detects active link generation forwarding fault among the VLAN1, determines that then link A1-B1 fault occurs transmitting also with this event notice egress device A in VLAN1.
After the source device A determines that the active link among the VLAN1 takes place to transmit fault, mode by the loopback mouth with the service message winding to local terminal, again the VLAN tag modification of the message of VLAN1 is become the label of VLAN2, transmit the service message of VLAN2 by protection link A2-B2; Perhaps, the source device A is redirected to VLAN2 by the mode that ACL is redirected with service message, and A2-B2 sends service message in VLAN2 by the protection link, namely transmits the service message of VLAN2 by link A2-B2.
After the egress equipment B determines that the active link among the VLAN1 takes place to transmit fault; can allow the message of VLAN2 and abandon the message of VLAN1 by ACL; thereby the egress equipment B receives service message by protection link A2-B2 in VLAN2, namely transmit the service message of VLAN2 by link A2-B2.
In addition, all occur transmit fault at VLAN1 and link A2-B2 at VLAN2 if source device A and/or egress equipment B detect link A1-B1, then need further report network to interrupt, for example be reported to network management system.
In actual applications, the 1:1 protection is switched structure and can be adopted unidirectional switching, also can adopt two-way switching, by the protection reversed process of APS agreement (APS) information reconciliation source and egress.。
Here, can adopt the multiple method for detecting connectivity of prior art detect the A1-B1 link at VLAN1 and A2-B2 link the connectedness in VLAN2, for example, adopt and operate, to manage, safeguard that (OAM) method carries out detection of connectivity, adopt two-way forwarding detection (BFD) to carry out detection of connectivity etc.
In the embodiment of the invention shown in Figure 8; by active link is divided among two different VLAN with the protection link; when needs are implemented the STP agreement in protected field; can pass through with source end equipment and two different STP examples of place end equipment disposition in same STP territory, as STP example 1 and STP example 2.The egress equipment B is decontroled STP example 1 and is blocked STP example 2, receives message by active link in VLAN1.Determine active link when VLAN1 takes place to transmit fault when the egress equipment B, the egress equipment B is decontroled STP example 2 and is blocked STP example 1, receives the service message of VLAN2.Thereby can the supportive protection territory and any mixed networking in STP territory, realize the coexistence in protected field and STP territory, and network convergence time is not subjected to the STP convergence time effects.
Figure 9 shows that the embodiment of the invention two adopts the 1:1 protection to switch the linear guard method flow chart of Ethernet that structure realizes in networking shown in Figure 6, may further comprise the steps:
Here, because the transmission means that adopts the 1:1 protection to switch service message in the structure, source equipment sends service message by active link or protection link from egress equipment in different VLAN.When the source device A sends service message by active link in VLAN1, the egress equipment B can allow the message of VLAN1 and abandon the message of VLAN2 by ACL, thereby the egress equipment B receives the service message among the VLAN1.
In this step, when if source end device A detects the active link generation forwarding fault of carrying out professional transmission, the event notice place end equipment B of fault then active link is taken place to transmit in VLAN1, makes place end equipment B determine that fault takes place to transmit active link in VLAN1; Vice versa, when place end equipment B detects the active link generation forwarding fault of carrying out professional transmission, active link taken place to transmit the event notice source end device A of fault at VLAN1.
After if the source device A determines that the active link among the VLAN1 takes place to transmit fault, the mode of source device A by the loopback mouth with the service message winding to the source device A, this message is stamped the label of VLAN2, send the service message of VLAN2 by link X1X2-Y1Y2; Perhaps, the source device A is redirected by ACL, and service message is redirected to VLAN2, sends the service message of VLAN2 by link X1X2-Y1Y2.
The egress equipment B determines that fault takes place to transmit link X1X2-Y1Y2 in VLAN1 after, can allow the message of VLAN2 and abandon the message of VLAN1 by ACL, thereby the egress equipment B receives the service message of VLAN2 by link X1X2-Y1Y2.
In VLAN1 and VLAN2, all occur transmitting fault if source device A and/or egress equipment B detect link X1X2-Y1Y2, then need further report network to interrupt, for example can be reported to network management system.
In actual applications, the 1:1 protection is switched structure and can be adopted unidirectional switching, also can adopt two-way switching, by the protection reversed process of APS agreement (APS) information reconciliation source and egress.
Here, can adopt the multiple method for detecting connectivity of prior art to detect the connectedness of link X1X2-Y1Y2 at VLAN1 and VLAN2, for example, adopt and operate, to manage, safeguard that (OAM) method carries out detection of connectivity, adopt two-way forwarding detection (BFD) to carry out detection of connectivity etc.
Among the embodiment shown in Figure 9; by with link X1X2-Y1Y2 as active link with as the protection link be divided into respectively among two different VLAN; when needs are implemented the STP agreement in protected field; two VLAN can be mapped to two different STP examples in same STP territory respectively, as STP example 1 and STP example 2.Place end equipment B is decontroled STP example 1 and is blocked STP example 2, the message of the VLAN1 that receives by active link.Determine active link when VLAN1 takes place to transmit fault when the egress equipment B, decontrol STP example 2 and block STP example 1, receive the service message of VLAN2 by the protection link.Thereby can the supportive protection territory and any mixed networking in STP territory, realize the coexistence in protected field and STP territory, and network convergence time is not subjected to the STP convergence time effects.Source device A and egress equipment B realize that respectively by the aggregated links access network 1:1 protects the load balancing of switching in the structure, are improving link utilization.
Figure 10 shows that and adopt the 1:1 protection to switch the linear guard method flow chart of Ethernet that structure realizes in networking shown in Figure 7, may further comprise the steps:
Here, because the transmission means that adopts the 1:1 protection to switch service message in the structure, source equipment sends service message by active link or protection link from egress equipment in different VLAN.When the source device A sends the service message of VLAN1 by active link, the egress equipment B can allow the message of VLAN1 and abandon the message of VLAN2 by ACL, thereby the egress equipment B receives the service message of VLAN1 by active link.
In this step, when if source end device A detects the active link generation forwarding fault of carrying out professional transmission, the event notice place end equipment B of fault then active link is taken place to transmit in VLAN1, makes place end equipment B determine that fault takes place to transmit active link in VLAN1; Vice versa, when place end equipment B detects the active link generation forwarding fault of carrying out professional transmission, active link taken place to transmit the event notice source end device A of fault at VLAN1.
After if the source device A determines that the active link among the VLAN1 take place to be transmitted fault, the mode of source device A by the loopback mouth to the source device A, stamped the label of VLAN2 with this message with the service message winding, sends the service message of VLAN2 by link AA-BB; Perhaps, the source device A is redirected by ACL, and service message is redirected to VLAN2, sends the service message of VLAN2 by link AA-BB.
The egress equipment B determines that fault takes place to transmit link AA-BB in VLAN1 after, can allow the message of VLAN2 by the mode of ACL and abandon the message of VLAN1, thereby the egress equipment B receives the service message of VLAN2 by link AA-BB.
In this step, when detecting the link occurs fault of carrying out professional transmission, by the business transmission being switched to the mode of not carrying out professional transmission and the transmission link of link failure not taking place, realized the 1:1 protection.If source device A and/or egress equipment B detect link AA-BB and fault all occurs transmitting at VLAN1 and VLAN2 in addition, then need further report network to interrupt, for example can be reported to network management system.
In actual applications, the 1:1 protection is switched structure and can be adopted unidirectional switching, also can adopt two-way switching, by the protection reversed process of APS information reconciliation source and egress.This is same as the prior art.
Here, can adopt the multiple method for detecting connectivity of prior art to detect link AA-BB in the connectedness of VLAN1 in VLAN2, for example, adopt and operate, to manage, safeguard that (OAM) method carries out detection of connectivity, adopt two-way forwarding detection (BFD) to carry out detection of connectivity etc.
In the embodiment of the invention shown in Figure 10; by with link AA-BB as active link with as the protection link be divided into respectively among two different VLAN; when needs are implemented the STP agreement in protected field; source end and Su Duan can be configured in the same STP territory; and two VLAN are mapped to different STP examples respectively, as STP example 1 and STP example 2.The egress equipment B is decontroled STP example 1 and is blocked STP example 2, receives message by active link in VLAN1.Determine active link when VLAN1 takes place to transmit fault when the egress equipment B, decontrol STP example 2 and block STP example 1, in VLAN2, receive message by the protection link.Thereby can the supportive protection territory and any mixed networking in STP territory, realize the coexistence in protected field and STP territory, and network convergence time is not subjected to the STP convergence time effects.
Shown in Figure 11 is that the embodiment of the invention four adopts 1+1 protection to switch the linear protection method flow diagram that structure realizes in networking shown in Figure 5, may further comprise the steps:
The source device A sends the service message of two VLAN all the time by the mode of traffic mirroring.The egress equipment B allows the message of VLAN1 by ACL and abandons the message of VLAN2, thereby the egress equipment B receives service message by active link in VLAN1.
The lasting detection of source device A and egress equipment B link A1-B1 is the connectedness in VLAN2 at VLAN1 and link A2-B2.It is roughly the same with the mode that above-described embodiment one discloses that source device A and egress equipment B determine that link A1-B1 occurs transmitting fault in VLAN1, so repeat no more.
The egress equipment B is determined to allow the message of VLAN2 and to abandon the message of VLAN1 by ACL, thereby the egress equipment B receives the service message of VLAN2 by the protection link.
If the source device A and/the egress equipment B all detects link A1-B1 and all occurs transmitting fault in VLAN2 at VLAN1 and link A2-B2, then needs further report network to interrupt, and for example can be reported to network management system.
In actual applications; 1+1 protection is switched structure can adopt unidirectional switching; also can adopt the two-way type of switching; if employing unidirectional switching; then do not need to use the protection reversed process of APS information reconciliation source and egress; if adopt two-way switching, then need the protection reversed process by APS information reconciliation source and egress.
Here, can adopt the multiple method for detecting connectivity of prior art to detect link A1-B1 in VLAN1 and link A2-B2 connectedness at VLAN2, for example, adopt and operate, to manage, safeguard that (OAM) method carries out detection of connectivity, adopt two-way forwarding detection (BFD) to carry out detection of connectivity etc.
In the embodiment of the invention shown in Figure 11; by active link is divided among two different VLAN with the protection link; when needs are implemented the STP agreement in protected field; can be by source end and Su Duan be configured in the same STP territory; and described two different VLAN are mapped to respectively in the different STP examples, as STP example 1 and STP example 2.The egress equipment B can also be decontroled STP example 1 and block STP example 2, receives message by active link in VLAN1.Determine active link when VLAN1 takes place to transmit fault when the egress equipment B, the egress equipment B is decontroled STP example 2 and is blocked STP example 1, receives the service message of VLAN2.Thereby can the supportive protection territory and any mixed networking in STP territory, realize the coexistence in protected field and STP territory.
Shown in Figure 12 is that the embodiment of the invention five adopts 1+1 protection to switch the linear protection method flow diagram that structure realizes in networking shown in Figure 6, may further comprise the steps:
Here, according to the transmission means that 1+1 protection is switched service message in the structure, source end device A is by the service message of link X1X2-Y1Y2 transmission VLAN1 and VLAN2, and place end equipment B then selects to receive by link X1X2-Y1Y2 the service message of VLAN1.
Source device A and egress equipment B continue to detect the connectedness of link X1X2-Y1Y2 in VLAN1 and VLAN2.It is roughly the same with the mode that above-described embodiment two discloses that source device A and egress equipment B determine that link X1X2-Y1Y2 occurs transmitting fault in VLAN1, so repeat no more.
The egress equipment B is determined to allow the message of VLAN2 and to abandon the message of VLAN1 by ACL, thereby the egress equipment B receives the service message of VLAN2 by the protection link.
In this step, fault in VLAN1 and VLAN2, all occurs turning to if source device A and/or egress equipment B detect link X1X2-Y1Y2, then need further report network to interrupt, for example can be reported to network management system.
In actual applications; 1+1 protection is switched structure can adopt unidirectional switching; also can adopt the two-way type of switching; if employing unidirectional switching; then do not need to use the protection reversed process of APS information reconciliation source and egress; if adopt two-way switching, then need the protection reversed process by APS information reconciliation source and egress.
Here, can adopt the multiple method for detecting connectivity of prior art to detect the connectedness of link X1X2-Y1Y2 in VLAN1 and VLAN2, for example, adopt and operate, to manage, safeguard that (OAM) method carries out detection of connectivity, adopt two-way forwarding detection (BFD) to carry out detection of connectivity etc.
In the embodiment of the invention shown in Figure 12; by with link X1X2-Y1Y2 as active link with as the protection link be divided into respectively among two different VLAN; when needs are implemented the STP agreement in protected field; source end and Su Duan can be configured in the same STP territory; and described two different VLAN are mapped to respectively in the different STP examples, as STP example 1 and STP example 2.The egress equipment B also can by decontroling STP example 1 and blocking STP example 2, receive the message of VLAN1 by link X1X2-Y1Y2.Determine link X1X2-Y1Y2 when VLAN1 takes place to transmit fault when the egress equipment B, the egress equipment B is further decontroled STP example 2 and is blocked STP example 1, receives the service message of VLAN2 by link X1X2-Y1Y2.Thereby can the supportive protection territory and any mixed networking in STP territory, realize the coexistence in protected field and STP territory, and network convergence time is not subjected to the STP convergence time effects.
Shown in Figure 13 is that the embodiment of the invention six adopts 1+1 protection to switch the linear guard method flow chart of Ethernet that structure realizes in networking shown in Figure 7, may further comprise the steps:
Here, according to the transmission means that 1+1 protection is switched service message in the structure, source end device A sends the service message of two VLAN all the time by the mode of traffic mirroring.The egress equipment B allows the message of VLAN1 by ACL and abandons the message of VLAN2, thereby the egress equipment B receives the reception service message of VLAN1 by active link.
In this step, source device A and egress equipment B continue to detect the connectedness of link AA-BB in VLAN1 and VLAN2.It is roughly the same with the mode that above-described embodiment three discloses that source device A and egress equipment B determine that link AA-BB occurs transmitting fault in VLAN1, so repeat no more.
Place end equipment B allows the message of VLAN2 by ACL and abandons the message of VLAN1, thereby receives the service message of VLAN2 by active link, has realized 1+1 protection.
If source device A and/or egress equipment B detect link AA-BB and all occur transmit fault in VLAN1 and VLAN2 in addition, then need further report network to interrupt, for example can be reported to network management system.
In actual applications; 1+1 protection is switched structure can adopt unidirectional switching; also can adopt the two-way type of switching; if employing unidirectional switching; then do not need to use the protection reversed process of APS information reconciliation source and egress; if adopt two-way switching, then need the protection reversed process by APS information reconciliation source and egress.
Here, can adopt the multiple method for detecting connectivity of prior art to detect the connectedness of link AA-BB in VLAN1 and VLAN2, for example, adopt and operate, to manage, safeguard that (OAM) method carries out detection of connectivity, adopt two-way forwarding detection (BFD) to carry out detection of connectivity etc.
In the embodiment of the invention shown in Figure 13; by with link AA-BB as active link with as the protection link be divided into respectively among two different VLAN; when needs are implemented the STP agreement in protected field; source end and Su Duan can be configured in the same STP territory; and described two different VLAN are mapped to respectively in the different STP examples, as STP example 1 and STP example 2.The egress equipment B can also be decontroled STP example 1 and block STP example 2, receives the message of VLAN1 by link AA-BB.Determine active link when VLAN1 takes place to transmit fault when the egress equipment B, the egress equipment B is further decontroled STP example 2 and is blocked STP example 1, receives the service message of VLAN2 by link AA-BB.Thereby can the supportive protection territory and any mixed networking in STP territory, realize the coexistence in protected field and STP territory, and network convergence time is not subjected to the STP convergence time effects.
As can be seen from the above embodiments; the present invention not only can support the networking mode between the source end equipment and place end equipment in the prior art; can also support source end equipment and place end equipment mode by single-link or aggregated links access network; and active link between source end equipment and the place end equipment and protection link can also be linked into same intermediate equipment.
Therefore, use the present invention, can realize the flexible networking between source equipment and the egress equipment.In addition; when needs are implemented the STP agreement in protected field; can also by with source end equipment and place end equipment disposition in same STP territory; and with active link with the protection link be mapped to respectively in the different STP examples; thereby support the mixed networking of STP territory and protected field; realize the coexistence of protected field and STP territory, and network convergence time is not subjected to the STP convergence time effects.
In addition, when source equipment and egress during by the aggregated links access network, can also improve the utilization rate of link.In addition; owing to can come identification work transmission entity and protection transmission entity by VLAN among the present invention; therefore, on active link and protection link, all can carry work transmission entity or the protection transmission entity that a plurality of Ethernets connect by the mode of dividing VLAN.
The present invention also provides a kind of device that is applied in the Ethernet cable protection, and this device is applicable as the source among Fig. 5, Fig. 6, Fig. 7.
As shown in figure 14, this device 1400 comprises: link unit 1401, packet sending and receiving unit 1402.
Link unit 1401 is used for connecting egress by active link in a VLAN; In the 2nd VLAN, pass through protection link connection egress.
Packet sending and receiving unit 1402 is used for carrying out business transmission at a VLAN with egress by active link, fault occurs transmitting if determine active link in a VLAN, then carries out business transmission with egress by the protection link in the 2nd VLAN.
As shown in figure 14; this device can be provided with detecting unit 1403; be used for connectedness and protection link the connectedness among two VLANs of testing link at a VLAN; fault appears transmitting in active link in a VLAN or the protection link occurs transmitting fault in the 2nd VLAN if detect, and then notifies packet sending and receiving unit 1402.This detecting unit 1403 can be further used for to transmit appearred in active link that fault or protection link occur transmitting the event notice egress of fault in the 2nd VLAN and the active link that receives from egress the forwarding fault occurs or protects link to occur transmitting the notice of fault and sending to message repeating unit 1402 in a VLAN in the 2nd VLAN in a VLAN.Message repeating unit 1042 can according to the notice of detecting unit 1043, determine that fault takes place to transmit active link and/or the protection link link failure occurs in the 2nd VLAN in a VLAN.
Message repeating unit 1402 is further used for: if determine that fault appears transmitting in active link in a VLAN and fault appears transmitting in the protection link in the 2nd VLAN, then report network interrupts.
The link unit 1401 of device in 1400 comes access network by the access device that two single-links or two aggregated links connect respectively as intermediate equipment, and perhaps link unit 1401 comes access network by the access device that a single-link or aggregated links connect as intermediate equipment.
Link unit 1401 also can be further used for: in the STP territory under device 1400 VLAN and the 2nd VLAN are mapped to a STP example and the 2nd STP example respectively.
In the present embodiment, the packet sending and receiving unit 1402 of device 1400 sends the service message of a VLAN by active link, make Su Duan receive the service message of a VLAN, realize that the source end carries out business by active link at a VLAN with Su Duan and transmits by active link.The packet sending and receiving unit 1402 of device 1400 determines that active link at a VLAN fault takes place to transmit; then send the service message of the 2nd VLAN by the protection link; so that egress receives the service message of the 2nd VLAN by active link, realize that source carries out business by active link at the 2nd VLAN with egress and transmit.In this way, in network, implement the 1:1 linear protection switching.
In the present embodiment; the packet sending and receiving unit 1402 of device 1400 sends the service message of a VLAN and the message of the 2nd VLAN respectively by active link and protection link all the time, makes the service message of place end selective reception the one VLAN or the service message of the 2nd VLAN.In this way, in network, realize the 1+1 linear protection switching.
The present invention also provides a kind of device that is applied to the linear protection of Ethernet, and this device is applicable as the Su Duan in Fig. 5, Fig. 6, the network shown in Figure 7.
Referring to Figure 15, this device 1500 comprises: link unit 1501, packet sending and receiving unit 1502.
Packet sending and receiving unit 1502 is used for carrying out business transmission at a VLAN with source by described active link, fault occurs transmitting if determine active link in a VLAN, then carries out business transmission with source by described protection link in the 2nd VLAN.
As shown in figure 15; this device 1500 can also be provided with detecting unit 1503; be used for connectedness and protection link the connectedness among two VLANs of testing link at a VLAN; fault appears transmitting in active link in a VLAN or the protection link occurs transmitting fault in the 2nd VLAN if detect, and then notifies packet sending and receiving unit 1502.This detecting unit 103 can be further used for to transmit appearred in active link that fault or protection link occur transmitting the event notice source of fault in the 2nd VLAN and the active link that receives from source the forwarding fault occurs or protects link to occur transmitting the notice of fault and sending to message repeating unit 102 in a VLAN in the 2nd VLAN in a VLAN.Message repeating unit 1502 can according to the notice of detecting unit 1053, determine that fault takes place to transmit active link and/or the protection link link failure occurs in the 2nd VLAN in a VLAN.
Described detecting unit 1503 is further used for: if determine that fault appears transmitting in active link in a VLAN and the protection link link failure occurs in the 2nd VLAN, then report network interrupts.
The link unit 1501 of device in 1500 comes access network by the access device that two single-links or two aggregated links connect respectively as intermediate equipment, and perhaps link unit 1501 comes access network by the access device that a single-link or aggregated links connect as intermediate equipment.
Described link unit 1501 is further used for: in the STP territory (the STP territory identical with the source end) under device 1500, a VLAN and the 2nd VLAN are mapped to a STP example and the 2nd STP example (shining upon identical STP example respectively with 1400 last VLAN of device and the 2nd VLAN) respectively.
In the present embodiment, the packet sending and receiving unit 1502 of device 1500 can be by the service message of active link reception from a VLAN of source, and realization source and egress are carried out the business transmission by active link at a VLAN.Packet sending and receiving unit 1502 definite active links of device 1500 are transmitted fault in VLAN generation, and then by the service message of protection link reception from the 2nd VLAN of source, realization source and egress are carried out the business transmission by active link at the 2nd VLAN.In this way, in network, realize the 1:1 linear protection switching.
In the present embodiment; device 1500 packet sending and receiving unit 1502 can also receive message from the 2nd VLAN of source end by selecting active link to receive from the service message of a VLAN of source end or by the protection link, thereby receives the service message of a VLAN in the service message selectivity from the service message of a VLAN of source end and the 2nd VLAN.In this way, in network, realize the 1+1 linear protection switching.
The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being made, is equal to replacement, improvement etc., all should be included within the scope of protection of the invention.
Claims (21)
1. linear guard method of Ethernet is characterized in that this method comprises:
The source end links to each other by active link in first virtual LAN VLAN with Su Duan, links to each other by the protection link in the 2nd VLAN;
Source end and Su Duan carry out the business transmission by active link in a VLAN;
Source end and/or place end determine that fault takes place to transmit active link in a VLAN, then source end and Su Duan carry out the business transmission by the protection link in the 2nd VLAN.
2. the linear guard method of Ethernet according to claim 1 is characterized in that this method further comprises:
Source and/or egress determine that active link at a VLAN and protection link fault takes place all to transmit in the 2nd VLAN, and then report network interrupts.
3. the linear guard method of Ethernet according to claim 1; it is characterized in that this method further comprises: source end and Su Duan in affiliated Spanning-Tree Protocol STP territory with a VLAN and the STP example and the 2nd STP example that the 2nd VLAN are mapped to this STP territory respectively.
4. Ethernet cable protection method according to claim 1 is characterized in that, source and egress are by two single-links or two aggregated links access networks.
5. Ethernet cable protection method according to claim 1 is characterized in that, source and egress are respectively by a single-link or an aggregated links access network.
6. according to claim 4 or the linear guard method of 5 described Ethernets, it is characterized in that,
Source and egress are carried out the business transmission by active link and comprised in a VLAN: source sends service message by active link in a VLAN, egress receives service message by active link in a VLAN;
Source and egress are carried out the business transmission by the protection link and comprised in the 2nd VLAN: source sends service message by the protection link in the 2nd VLAN, egress receives service message by the protection link in the 2nd VLAN.
7. according to claim 4 or the linear guard method of the described Ethernet of 5 arbitrary claims, it is characterized in that,
Source and egress are carried out the business transmission by active link and comprised in a VLAN: source sends service message by active link in a VLAN, send service message by the protection link in the 2nd VLAN simultaneously, egress receives service message by active link in a VLAN;
Source and egress are carried out the business transmission by the protection link and comprised in the 2nd VLAN: source sends service message by active link in a VLAN; send service message by the protection link in the 2nd VLAN simultaneously, egress receives service message by the protection link in the 2nd VLAN.
8. device that is applied to Ethernet cable protection, this device is characterized in that this device comprises: link unit, packet sending and receiving unit for the source in the Ethernet cable protection;
The link unit is used for connecting egress by active link in a VLAN; In the 2nd VLAN, pass through protection link connection egress;
The packet sending and receiving unit is used for carrying out business transmission at a VLAN with egress by active link, if determine active link fault takes place in a VLAN to transmit, and then carries out business transmission with egress by the protection link in the 2nd VLAN.
9. device according to claim 8 is characterized in that, the packet sending and receiving unit is further used for: fault among two VLANs all occur transmit with the protection link if determine active link in a VLAN, then report network interrupts.
10. device according to claim 8 is characterized in that, the link unit is further used for: in affiliated STP territory a VLAN and the 2nd VLAN are mapped to a STP example and the 2nd STP example respectively.
11. device according to claim 8 is characterized in that, the link unit connects respectively access device by two single-links or two aggregated links.
12. device according to claim 8 is characterized in that, the link unit connects access device by a single-link or an aggregated links.
13. according to claim 11 or 12 described devices, it is characterized in that,
The packet sending and receiving unit sends service message by active link in a VLAN makes egress receive this service message in a VLAN, if determine that active link fault occurs transmitting and then sends service message so that egress receives this service message in the 2nd VLAN in the 2nd VLAN by the protection link in a VLAN.
14. according to claim 11 or the described device of 12 arbitrary claims, it is characterized in that,
The packet sending and receiving unit sends service message by active link and protection link in a VLAN neutralizes the 2nd VLAN, receive message so that egress is chosen among a VLAN or the 2nd VLAN.
15. a device that is applied to Ethernet cable protection, this device is the egress in the Ethernet cable protection, and this egress links to each other with source with the protection link by active link, it is characterized in that this device comprises: link unit, packet sending and receiving unit;
The link unit is used for connecting source by active link in a VLAN; In the 2nd VLAN, pass through protection link connection source;
The packet sending and receiving unit is used for carrying out business transmission at a VLAN with the source end by active link, transmits fault if determine active link in a VLAN, then carries out business transmission with the source end by the protection link in the 2nd VLAN.
16. device according to claim 15 is characterized in that, the packet sending and receiving unit is further used for: link failure among two VLANs all occur with the protection link if determine active link in a VLAN, then report network interrupts.
17. device according to claim 15 is characterized in that, the link unit is further used for: in affiliated STP territory a VLAN and the 2nd VLAN are mapped to a STP example and the 2nd STP example respectively.
18. device according to claim 15 is characterized in that, the link unit connects respectively access device by two single-links or two aggregated links.
19. device according to claim 15 is characterized in that, the link unit connects access device by a single-link or an aggregated links.
20. the device according to described in claim 18 or 19 is characterized in that,
The packet sending and receiving unit receives service message from source by active link in a VLAN, occurs transmitting fault then by protecting link to receive service message from source in the 2nd VLAN in a VLAN if determine active link.
21. according to claim 18 or 19 described devices, it is characterized in that,
The packet sending and receiving unit is selected to receive service message from source by active link or protection link at a VLAN or the 2nd VLAN.
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