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Communication method, device and system for avoiding loop

A technology of communication equipment and communication methods, applied in the field of communication, can solve problems such as loop problems, and achieve the effect of avoiding transmission loop problems

Active Publication Date: 2020-01-07
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After PE2 receives the data packet (packet) to be sent to CE1 sent by PE device PE3, when the interface connecting PE2 to CE1 is in the fault state, PE2 sends the data packet to PE1, and after PE1 receives the data packet sent by PE2, when PE1 When the interface connected to CE1 is in a fault state, a data packet is sent to PE2, and the data packet is sent back to PE2, causing a loop problem

Method used

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  • Communication method, device and system for avoiding loop
  • Communication method, device and system for avoiding loop
  • Communication method, device and system for avoiding loop

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Embodiment Construction

[0034] In order to make the purpose, technical solution and advantages of the present application clearer, the implementation manners of the present application will be further described below in conjunction with the accompanying drawings.

[0035] Internet Protocol version 6 segment routing (SRv6) inserts a segment routing header (segment routing header, SRH) in the IPv6 packet, including an IPv6 address list and a link pointing to the IPv6 address list in the SRH. Index, the segment end point node (segmentendpoint node) on the data packet forwarding path searches for IPv6 addresses one by one according to the index, and updates the destination address of the data packet with the found IPv6 address to realize forwarding. The destination address of the data packet is an IPv6 address, and the IPv6 address in SRv6 can be used as a segment identifier (segment identifier, SID).

[0036] SRv6EVPN refers to SRv6-based EVPN.

[0037] Virtual Private Wire Service (VPWS) is a point-to...

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Abstract

The invention provides a communication method, device and system for avoiding a loop. The invention discloses a communication method. The first PE device sends a first identifier to the second PE device through the first interface, then, the first PE equipment receives a data packet which is sent by the second PE equipment and comprises a first identifier through the first interface; and then thefirst PE device determines that a second interface associated with the first identifier is in a fault state, and in response to determining that the second interface is in the fault state, the first PE device avoids sending a data packet to the second PE device via the first interface, and the second interface is an interface of the first PE device for connecting the CE device. Through the schemeprovided by the invention, a loop can be avoided.

Description

technical field [0001] The present application relates to the communication field, and in particular to a communication method, device and system for avoiding loops. Background technique [0002] Ethernet virtual private network (ethernet virtual private network, EVPN) provides an all-active mode. In the all-active mode, when a device is multi-homed to multiple provider edges , PE) device, the multiple PE devices can forward traffic to the device. When the multiple PE devices refer to two PE devices, the aforementioned multi-active mode may also be called a dual-active mode, and the aforementioned multi-homing may also be called dual-homed. [0003] In the EVPN active-active mode, when the interfaces connecting the two PE devices to the customer edge (CE) device are both in a fault state, a loop problem will be caused. For example, if figure 1 As shown in the figure, CE equipment CE1 is dual-homed to PE equipment PE1 and PE2, and PE1 and PE2 are in the active-active mode....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/705H04L12/703H04L12/741H04L12/749H04L12/46H04L45/18H04L45/28H04L45/74H04L45/741
CPCH04L45/28H04L45/745H04L45/18H04L45/741H04L12/4641H04L2101/622
Inventor 胡重阳王海波
Owner HUAWEI TECH CO LTD
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