CN101778031A - Ethernet and multicast stream processing method based on VPLS - Google Patents
Ethernet and multicast stream processing method based on VPLS Download PDFInfo
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Abstract
The invention discloses an Ethernet and multicast stream processing method based on VPLS; a configured semi-opening H-VPLS ring comprises a first semi-ring and a second semi-ring, the first semi-ring is communicated with the second semi-ring through first PE equipment, and the second semi-ring is communicated with the first semi-ring through second PE equipment; the first PE equipment proactively establishes PW connection with the second PE equipment through BFD when the failure of the first semi-ring is detected and the second semi-ring is normal; and the second PE equipment proactively establishes PW connection with the first PE equipment through BFD when the failure of the second semi-ring is detected and the first semi-ring is normal. The Ethernet and multicast stream processing method based on VPLS prevents traffic redundancy and bandwidth waste, and can well protect the business in case of single node failure.
Description
Technical field
The present invention relates to the networking technology of Ethernet, relate in particular to a kind of Ethernet and multicast stream processing method thereof based on VPLS.
Background technology
In metropolitan area network, can run into three kinds of faults usually, that is: one, a node or a link failure in the metropolitan area network; Two, metropolitan area network is to the link failure between the core online; Three, the node failure in the core net.These faults can have a strong impact on the robustness and the stability of network.
Problem at link failure, prior art has proposed a kind of VPLS (VPLS, Virtual Private LAN Service) networking technology, be illustrated in figure 1 as in the prior art distribution model based on VPLS, all Provider Edge (PE among the figure, Provider Edge) equipment all descends to hang customer edge (CE, Custom Edge) equipment.In the prior art, the distribution model of the VPLS of application drawing 1, a kind of metropolitan area network solution that adopts metropolitan area network the whole network VPLS networking technology as shown in Figure 2, the whole network VPLS networking technology adopt two P (Provider) up, promptly flow is introduced two descending routers (PE1 and PE2) in the network by the static adding of two P equipment (R1 and R2) multicast group; Adopt the networking of shellring shape at metropolitan area network, after routing convergence, can cut apart with the poison reverse assurance by level and not have loop for three layers.On three layers of physics looped network basis, adjacent PE sets up two layers hierarchical virtual private LAN service (H-VPLS, Hierarchical Virtual Private LAN service), professional transmission on the H-VPLS ring, in the time of so can effectively ensureing link failure, the robustness of metropolitan area network and stability.
Why above-mentioned networking solution shown in Figure 2 adopts the reason of H-VPLS to be, tradition VPLS has adopted horizontal cutting techniques in order to prevent loop, promptly " there is not PE to transmit the packet that it receives from another PE " to a PE, if adopt traditional VPLS, because the multicast of all PE is positioned at same virtual routing transmitting example (VFI, Virtual Forwarding Instance) in, received the message of PE1 so as PE2, because the horizontal cutting techniques of VPLS, PE2 can not be transmitted to PE3 to multicast message.If, must adopt VPLS to connect multicast message entirely and just can issue each PE, therefore adopted the H-VPLS technology here so adopt common VPLS.
Above-mentioned networking solution has following main points:
1, H-VPLS ring.
H-VPLS is divided into the virtual link (PW, Pseudo Wire) of two types of Hub and Spoke, wherein, between the Spoke PE, can transmit data message between Spoke PE and the Hub PE, and can not transmit data message between the Hub PE.Then can adopt the PW of Spoke type interconnected between the PE of metropolitan area network shown in Figure 2 (dotted line is depicted as PW among Fig. 2), also can adopt the PW of Spoke-Hub type alternately interconnected, as PE1＜-PE2/PE2＜-PE3/PE3＜-PE4/PE4＜-can set up the PW of Spoke type between the PE5.Can not set up PW but connect between 2 PE (PE1 and PE5) of up 2 P equipment (R1 and R2), if foundation can cause 2 layers of VPLS loop.
Networking structure according to Fig. 2, no matter multicast data flow is to introduce or the R2 introducing from R1, (suppose that the CE that each PE hangs down has user's program request) when multicast data flow is incorporated into each PE only can be between adjacent PE inundation, so multicast data flow the flow direction between PW all be unidirectional and unique, be that multicast message only duplicates portion in metropolitan area network.Be the situation that multicast data flow is introduced from PE1 as shown in Figure 3.
2, multicast service is introduced mechanism.
Because metropolitan area network is up 2 P equipment are arranged, so the mode that adopts static multicast groups to add is introduced upstream router with Business Stream, upstream router is taked active and standby technology, be that these two service nodes (PE1 and PE5 among Fig. 3) are respectively active and standby, decide active and standby switching by active and standby Internet igmpinternet (IGMP, Internet GroupManagement Protocol) requestor election mechanism.
3、MPLS?FRR。
The quick heavy-route of MPLS (FRR) technology is widely used in guaranteeing that the MPLS network has carrier-class reliability protection (50ms switches); used MPLS FRR to guarantee the VPLS protection of link in this multicast metropolitan area network solution; in when, link down not taking place when; multicast data flow is (supposing that R1 is main requestor) in the path of H-VPLS ring: R1-＞PE1-＞PE2-＞PE3-＞PE4-＞PE5, as shown in Figure 4.
Application scenarios as shown in Figure 5, in when, between PE2 and the PE3 link down taking place when, because the PW that PE2 and PE3 set up, when so the route of PE2 and PE3 is interrupted, the loopback of PE3 (Loopback) route can be passed through PE4, PE5, PE1 is distributed to PE2, therefore, PE2 is PE2-＞PE1-＞PE5-＞PE4-＞PE3 to the new MPLS forward-path of PE3, PE2 is according to this new label switched path (LSP, Label Switching Path) and PE3 set up PW, then multicast data flow in the path of two layers of H-VPLS ring as shown in Figure 5, be R1-＞PE1-＞PE2-＞PE1-＞PE5-＞PE4-＞PE3-＞PE4-＞PE5, so just guaranteed that by MPLS FRR the VPLS multicast message can be transmitted under the situation of link down.
4, the advantage of above-mentioned technology and problem.
According to top analysis, the advantage of this metropolitan area network technical solution is mainly reflected in:
This VPLS networking has been avoided the full connection of VPLS by H-VPLS, so the multicast message introduced of P equipment will duplicate aly to the H-VPLS ring in the P device just, and whole multicast data message is one-way transmission in single PW.Simultaneously, can guarantee that by MPLS FRR multicast data flow reaches the protection of switching of carrier class 50ms.
But the defective of this solution also is conspicuous, mainly comprises:
In the link chain rupture, even protect switching of flow by FRR, but multicast data flow is through the VPLS ring time, flow path has produced tangible redundancy, the serious waste bandwidth, that is to say if suppose flux of multicast to have occupied big bandwidth, when link failure FRR switches protection, might produce serious packet loss;
In addition, ineffective to the protection of single node fault, as shown in Figure 6, when node PE3 delays machine (down), can't set up PW forever between PE2, PE3 and PE3, the PE4, because the loopback address of PE3 is unreachable.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of Ethernet and multicast stream processing method thereof based on VPLS, and is redundant and to the ineffective problem of single node error protection to solve the flow path that exists in the prior art.
For achieving the above object, technical scheme of the present invention is achieved in that
The invention provides a kind of multicast stream processing method of the Ethernet based on VPLS (VPLS), this method comprises:
Disposing hierarchical virtual private LAN service (H-VPLS) ring of the half-open shape of the mouth as one speaks is made up of first semi-ring and second semi-ring, and described first semi-ring is communicated with second semi-ring by first Provider Edge (PE) equipment, and described second semi-ring is communicated with first semi-ring by the 2nd PE equipment;
A described PE equipment detects (BFD) by two-way forwarding, detecting the first semi-ring fault, and second semi-ring is just often, initiatively set up with described the 2nd PE equipment between virtual link (PW) be connected;
Described the 2nd PE equipment detecting the second semi-ring fault, and first semi-ring is just often by BFD, initiatively set up with a described PE equipment between PW be connected.
After configuration first semi-ring and second semi-ring, this method further comprises: dispose the PW between PE equipment and the 2nd PE equipment, and a described PE equipment is not initiatively set up tag distribution protocol (LDP) with the 2nd PE equipment acquiescence and is connected, and can only passively set up PW and connect.
This method further comprises: at described first semi-ring and second semi-ring all just often, the PW state between described PE equipment and the 2nd PE equipment is down, and does not have multicast data flow to introduce between described PE equipment and the 2nd PE equipment.
A described PE equipment detecting the first semi-ring fault, and second semi-ring is just often by BFD, initiatively set up with the 2nd PE equipment between PW be connected, be specially:
When a described PE Equipment Inspection is down to the BFD state between the P equipment of self and first semi-ring, and the BFD state between the P equipment of second semi-ring is when being up, initiatively set up with the 2nd PE equipment between PW be connected.
Described the 2nd PE equipment detecting the second semi-ring fault, and first semi-ring is just often by BFD, initiatively set up with a PE equipment between PW be connected, be specially:
When described the 2nd PE Equipment Inspection is down to the BFD state between the P equipment of self and second semi-ring, and the BFD state between the P equipment of first semi-ring is when being up, initiatively set up with a PE equipment between PW be connected.
The present invention also provides a kind of Ethernet based on VPLS, the half-open shape of the mouth as one speaks H-VPLS ring of described Ethernet is made up of first semi-ring and second semi-ring, and described first semi-ring is communicated with second semi-ring by a PE equipment, and described second semi-ring is communicated with first semi-ring by the 2nd PE equipment;
A described PE equipment is used for by BFD, detecting the first semi-ring fault, and second semi-ring is just often, initiatively set up with described the 2nd PE equipment between PW be connected;
Described the 2nd PE equipment is used for by BFD, detecting the second semi-ring fault, and first semi-ring is just often, initiatively set up with a described PE equipment between PW be connected.
Configuration PW between described PE equipment and the 2nd PE equipment, and a described PE equipment and the 2nd PE equipment acquiescence initiatively do not set up LDP and is connected, can only passively set up the PW connection.
At described first semi-ring and second semi-ring all just often, the PW state between described PE equipment and the 2nd PE equipment is down, and does not have multicast data flow to introduce between described PE equipment and the 2nd PE equipment.
A described PE equipment is further used for, and is down at the BFD state that detects between the P equipment of self and first semi-ring, and the BFD state between the P equipment of second semi-ring is when being up, initiatively set up with the 2nd PE equipment between PW be connected.
Described the 2nd PE equipment is further used for, and is down at the BFD state that detects between the P equipment of self and second semi-ring, and the BFD state between the P equipment of first semi-ring is when being up, initiatively set up with a PE equipment between PW be connected.
A kind of Ethernet and multicast stream processing method thereof provided by the present invention based on VPLS, disposing the H-VPLS ring of the half-open shape of the mouth as one speaks is made up of first semi-ring and second semi-ring, and first semi-ring is communicated with second semi-ring by a PE equipment, and second semi-ring is communicated with first semi-ring by the 2nd PE equipment; The one PE equipment detects (BFD) by two-way forwarding, detecting the first semi-ring fault, and second semi-ring is just often, initiatively set up with the 2nd PE equipment between PW be connected; The 2nd PE equipment detecting the second semi-ring fault, and first semi-ring is just often by BFD, initiatively set up with a PE equipment between PW be connected.
By the present invention, avoided Business Stream redundancy and bandwidth waste, when the single node fault takes place, can play good service protection; In addition, owing to Business Stream is encircling always, thereby shortened the time of introducing Business Stream.
Description of drawings
Fig. 1 is based on the distribution model schematic diagram of VPLS in the prior art;
Fig. 2 is the schematic diagram of the whole network VPLS networking in the prior art;
Fig. 3 is the schematic diagram that multicast data flow is introduced among the whole network VPLS of prior art;
Fig. 4 be in the prior art when no link down, multicast data flow is at the path schematic diagram of H-VPLS ring;
Fig. 5 be in the prior art when link down, multicast data flow is at the path schematic diagram of H-VPLS ring;
Fig. 6 be in the prior art when node failure, multicast data flow is at the path schematic diagram of H-VPLS ring;
Fig. 7 among the present invention based on the Ethernet networking schematic diagram of VPLS;
Fig. 8 among the present invention when link down, the path schematic diagram that multicast data flow is encircled at H-VPLS;
Fig. 9 among the present invention when node failure, the path schematic diagram that multicast data flow is encircled at H-VPLS.
Embodiment
The technical solution of the present invention is further elaborated below in conjunction with the drawings and specific embodiments.
Redundant and for solving the flow path that exists in the prior art to the ineffective problem of single node error protection, the present invention proposes a kind of Ethernet networking mode based on VPLS, disposing the H-VPLS ring of the half-open shape of the mouth as one speaks is made up of first semi-ring and second semi-ring, and first semi-ring is communicated with second semi-ring by a PE equipment, and second semi-ring is communicated with first semi-ring by the 2nd PE equipment; Then, dispose the PW between PE equipment and the 2nd PE equipment, and dispose a PE equipment and the 2nd PE equipment acquiescence and initiatively do not set up tag distribution protocol (LDP, Label Distribution Protocol) and connect, can only passively set up PW and connect.
Based on above-mentioned networking mode and configuration, the one PE equipment and the 2nd PE equipment detect (BFD by two-way forwarding, Bidirectional Forwarding Detection), detecting first semi-ring and second semi-ring all just often, PW state between the one PE equipment and the 2nd PE equipment is down, and does not have multicast data flow to introduce between PE equipment and the 2nd PE equipment;
Detect the first semi-ring fault at a PE equipment by BFD, and second semi-ring is just often, a PE equipment initiatively set up with the 2nd PE equipment between PW be connected; Concrete: when a PE Equipment Inspection is down to self with BFD state between the P equipment of first semi-ring, and the BFD state between the P equipment of second semi-ring is when being up, and active foundation is connected with PW between the 2nd PE equipment;
Detect the second semi-ring fault at the 2nd PE equipment by BFD, and first semi-ring is just often, the 2nd PE equipment initiatively set up with a PE equipment between PW be connected; Concrete: when the 2nd PE Equipment Inspection is down to self with BFD state between the P equipment of second semi-ring, and the BFD state between the P equipment of first semi-ring is when being up, and active foundation is connected with PW between the PE equipment.
Below in conjunction with specific embodiment above-mentioned networking mode and multicast stream processing method are further elaborated.
As shown in Figure 7, half-open shape of the mouth as one speaks networking is adopted in whole networking, and uses a multicast VFI; Professional VFI is divided into two paths transmission (i.e. two semi-rings), does not have physical connection between PE1 and PE6, and does not set up the PW that can transmit between PE3 and the PE4, adopts bfd for backup pw technology herein, is described below:
PE3 (a PE equipment) and PE4 (the 2nd PE equipment) configuration PW, but acquiescence is not initiatively set up the LDP connection, can only passively set up PW and connect, perhaps the state of PE3 and PE4 is set to standby (Standby), and PE3 triggers PW with PE4 by BFD and is connected;
PE3 and R1 (a P equipment) set up BFD, PE4 and R2 (the 2nd P equipment) set up BFD, if and only if, and PE3 detects the BFD state up of PE3 to R2 (PE3-R2), during the BFD state down of PE3 to R1 (PE3-R1), PE3 will initiatively set up the PW that activates (active) with PE4 and be connected, after the PW between PE3 and the PE4 connects foundation, can flow by multicast data forwarding between PE3 and the PE4;
Same, if and only if, and PE4 detects the BFD state up of PE4 to R1 (PE4-R1), and during the BFD state down of PE4 to R2 (PE4-R2), the PW that PE4 will be initiatively with PE3 sets up active is connected, after the PW between PE4 and the PE3 connects foundation, can multicast data forwarding stream between PE4 and the PE3.
Under networking condition shown in Figure 7, R1 and R2 are the multicast inquiry nodes, and it is descending that it introduces whole multicast data flows by static state adding group, and the switching equipment that ring connects down intercepts whether introduce corresponding multicast data flow by IGMP SNOOPING.
During below with reference to link down shown in Figure 8, multicast data flow is at the path schematic diagram of H-VPLS ring, and the multicast stream processing method during to link down describes.As shown in Figure 8, when the link between PE2 and the PE3 disconnects, PE3 detects the BFD state down of PE3-R1, and the BFD state up of PE3-R2, PE3 initiatively foundation is connected with the PW of the active of PE4, the multicast data flow forward-path of this moment comprises: these two multicast data flow forward-paths of R1-＞PE1-＞PE2 and R2-＞PE6-＞PE5-＞PE4-＞PE3 shown in arrow line among the figure.
When referring again to single node fault shown in Figure 9 below, multicast data flow is at the path schematic diagram of H-VPLS ring, and the multicast stream processing method during to the single node fault describes.As shown in Figure 9, when node PE2 breaks down, PE3 detects the BFD state down of PE3-R1, the BFD state up of PE3-R2, PE3 initiatively foundation is connected with the PW of the active of PE4, the multicast data flow forward-path of this moment comprises: these two multicast data flow forward-paths of R1-＞PE1 and R2-＞PE6-＞PE5-＞PE4-＞PE3 shown in arrow line among the figure.
Be example with above-mentioned Fig. 7, Fig. 8, networking mode shown in Figure 9 still, the flow process of multicast specifically may further comprise the steps on its configuration H-VPLS ring:
Step 101 is prepared the line between the PE equipment, and it is up to prepare two P equipment.
Step 102, three layers of route between the configuration PE directly do not connect between PE1 and the PE6.
Step 103, the H-VPLS between the configuration PE connects.
Step 104, multicast VFI is divided into two paths transmission, and R1 and R2 are the multicast inquiry device.
Step 105, R1 and R2 are by static adding group, and multicast data flow is introduced in respectively on two semi-rings.
Step 106, PE3 and PE4 configuration PW, but acquiescence is not initiatively set up the LDP connection, can only passively set up PW and connect.
After environment configurations was finished, under the normal condition, the PW state between PE3 and the PE4 was down, did not have multicast data flow to introduce, and therefore, two semi-rings under the normal condition can not cause the multicast service conflict.
When the link between PE2 and the PE3 disconnected because of breaking down, PE3 detected the BFD state up of PE3-R2, and the BFD state down of PE3-R1, and PE3 is connected active with the PW that PE4 sets up active.Because the PW state up of PE3 and PE4, and multicast data flow encircle always, so on two newly-generated semi-rings whole multicast data flows arranged again, thereby multicast data flow can not interrupted.
When the PE2 node broke down, PE3 detected the BFD state up of PE3-R2, and the BFD state down of PE3-R1, and PE3 is connected active with the PW that PE4 sets up active.Because the PW state up of PE3 and PE4, and multicast data flow encircle always, so on two newly-generated semi-rings whole multicast data flows arranged again, thereby multicast data flow can not interrupted.
In sum,, avoided Business Stream redundancy and bandwidth waste, when the single node fault takes place, can play good service protection by networking mode of the present invention and multicast stream processing method; In addition, owing to Business Stream is encircling always, thereby shortened the time of introducing Business Stream.
The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.
Claims (10)
1. multicast stream processing method based on the Ethernet of VPLS (VPLS) is characterized in that this method comprises:
Disposing hierarchical virtual private LAN service (H-VPLS) ring of the half-open shape of the mouth as one speaks is made up of first semi-ring and second semi-ring, and described first semi-ring is communicated with second semi-ring by first Provider Edge (PE) equipment, and described second semi-ring is communicated with first semi-ring by the 2nd PE equipment;
A described PE equipment detects (BFD) by two-way forwarding, detecting the first semi-ring fault, and second semi-ring is just often, initiatively set up with described the 2nd PE equipment between virtual link (PW) be connected;
Described the 2nd PE equipment detecting the second semi-ring fault, and first semi-ring is just often by BFD, initiatively set up with a described PE equipment between PW be connected.
2. according to the multicast stream processing method of the described Ethernet based on VPLS of claim 1, it is characterized in that, after configuration first semi-ring and second semi-ring, this method further comprises: dispose the PW between PE equipment and the 2nd PE equipment, and a described PE equipment is not initiatively set up tag distribution protocol (LDP) with the 2nd PE equipment acquiescence and is connected, and can only passively set up PW and connect.
3. according to the multicast stream processing method of claim 1 or 2 described Ethernets based on VPLS, it is characterized in that, this method further comprises: at described first semi-ring and second semi-ring all just often, PW state between described PE equipment and the 2nd PE equipment is down, and does not have multicast data flow to introduce between described PE equipment and the 2nd PE equipment.
4. according to the multicast stream processing method of claim 1 or 2 described Ethernets based on VPLS, it is characterized in that a described PE equipment passes through BFD, detecting the first semi-ring fault, and second semi-ring is just often, initiatively set up with the 2nd PE equipment between PW be connected, be specially:
When a described PE Equipment Inspection is down to the BFD state between the P equipment of self and first semi-ring, and the BFD state between the P equipment of second semi-ring is when being up, initiatively set up with the 2nd PE equipment between PW be connected.
5. according to the multicast stream processing method of claim 1 or 2 described Ethernets based on VPLS, it is characterized in that described the 2nd PE equipment passes through BFD, detecting the second semi-ring fault, and first semi-ring is just often, initiatively set up with a PE equipment between PW be connected, be specially:
When described the 2nd PE Equipment Inspection is down to the BFD state between the P equipment of self and second semi-ring, and the BFD state between the P equipment of first semi-ring is when being up, initiatively set up with a PE equipment between PW be connected.
6. Ethernet based on VPLS, it is characterized in that, the half-open shape of the mouth as one speaks H-VPLS ring of described Ethernet is made up of first semi-ring and second semi-ring, and described first semi-ring is communicated with second semi-ring by a PE equipment, and described second semi-ring passes through the 2nd PE equipment and is communicated with first semi-ring;
A described PE equipment is used for by BFD, detecting the first semi-ring fault, and second semi-ring is just often, initiatively set up with described the 2nd PE equipment between PW be connected;
Described the 2nd PE equipment is used for by BFD, detecting the second semi-ring fault, and first semi-ring is just often, initiatively set up with a described PE equipment between PW be connected.
7. according to the described Ethernet of claim 6, it is characterized in that based on VPLS, the configuration PW between described PE equipment and the 2nd PE equipment, and a described PE equipment and the 2nd PE equipment acquiescence initiatively do not set up LDP and is connected, can only passively set up the PW connection.
8. according to claim 6 or 7 described Ethernets based on VPLS, it is characterized in that, at described first semi-ring and second semi-ring all just often, the PW state between described PE equipment and the 2nd PE equipment is down, and does not have multicast data flow to introduce between described PE equipment and the 2nd PE equipment.
9. according to claim 6 or 7 described Ethernets based on VPLS, it is characterized in that, a described PE equipment is further used for, at the BFD state that detects between the P equipment of self and first semi-ring is down, and when the BFD state between the P equipment of second semi-ring is up, initiatively set up with the 2nd PE equipment between PW be connected.
10. according to claim 6 or 7 described Ethernets based on VPLS, it is characterized in that, described the 2nd PE equipment is further used for, at the BFD state that detects between the P equipment of self and second semi-ring is down, and when the BFD state between the P equipment of first semi-ring is up, initiatively set up with a PE equipment between PW be connected.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103795625A (en) * | 2014-01-23 | 2014-05-14 | 杭州华三通信技术有限公司 | Multi-protocol label switching network quick rerouting implementation method and device |
| WO2018006711A1 (en) * | 2016-07-08 | 2018-01-11 | 中兴通讯股份有限公司 | Service processing method and device |
| CN108494691A (en) * | 2018-06-22 | 2018-09-04 | 新华三技术有限公司 | A kind of multicast forward method, device and VTEP |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101420377B (en) * | 2008-11-27 | 2011-05-04 | 华为技术有限公司 | Method and system for sharing load |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103795625A (en) * | 2014-01-23 | 2014-05-14 | 杭州华三通信技术有限公司 | Multi-protocol label switching network quick rerouting implementation method and device |
| WO2018006711A1 (en) * | 2016-07-08 | 2018-01-11 | 中兴通讯股份有限公司 | Service processing method and device |
| CN108494691A (en) * | 2018-06-22 | 2018-09-04 | 新华三技术有限公司 | A kind of multicast forward method, device and VTEP |
| CN108494691B (en) * | 2018-06-22 | 2021-02-26 | 新华三技术有限公司 | Multicast forwarding method and device and tunnel endpoint equipment |
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