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mpls-based evpn BUM message locality priority forwarding method and system

A technology of local priority and forwarding method, applied in the network field, can solve the problems of complex implementation and low MPLSEVPN forwarding efficiency, and achieve the effect of simplifying hardware design and improving packet forwarding efficiency.

Active Publication Date: 2022-04-01
SUZHOU CENTEC COMM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] The technical problem to be solved by the embodiments of the present invention is how to solve the problem of low forwarding efficiency and complex implementation in the current MPLS EVPN solution in the prior art

Method used

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  • mpls-based evpn BUM message locality priority forwarding method and system

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Embodiment 1

[0042] figure 2 It is a network topology applied in this embodiment. The ESI of CE1 is ES1, the ESI of CE2 is ES2, the ESI of CE3 is ES3, the ESI of CE4 is ES4, and CE5 is directly connected to PE1. PE1 and PE4 are DFs.

[0043] The basic idea of ​​the method of the present invention is that when the message is copied, the specific ESI-Label is no longer carried, but the Ingress PE ID of the source PE is mapped to the Ingress-PE-ID-Label, which is carried in the message and sent out In this way, when the Egress PE on the other PE side receives the copied message, it obtains the Ingress PEID according to the Ingress-PE-ID-Label, and then obtains the ESIs of the ESs connected to the source PE by querying the Label table. During the replication process of this PE, it is sufficient to discard the packets sent to these ESIs.

[0044] Such as figure 2 As shown, assume that CE1 sends a BUM (Broadcast / Unknown unicast / Multicast) message, such as a broadcast message, to CE2-5 at t...

Embodiment 2

[0057] This embodiment discloses an MPLS-based EVPN BUM message local priority forwarding system, which is applied to the PE end, including: the source PE end, including the copied BUM message after receiving the BUM message sent by the CE end Pressing into the source PE label pressing unit; and, according to the configuration of broadcast forwarding, sending to the sending unit of other PE ends; as the PE end of the DF, including the method for obtaining the source PE corresponding to the source PE through mapping according to the source PE label A mapping unit of the ES; and a sending unit for sending the copied BUM message to the target CE end in the ES corresponding to the PE; the target CE end excludes the CE end in the ES corresponding to the source PE.

[0058] In a specific implementation, in the aforementioned MPLS-based EVPN BUM message local priority forwarding system, the sending unit at the source PE end is further configured to directly send the BUM message to the...

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Abstract

The present invention discloses an MPLS-based EVPN BUM message locality priority forwarding method and system, wherein the method includes: after the source PE end receives the BUM message sent by the CE end, presses into the copied BUM message The source PE label is sent to other PE terminals according to the broadcast forwarding configuration; the PE terminal serving as the DF obtains one or more ESs corresponding to the source PE through mapping according to the source PE label; and, reports the copied BUM to The text is sent to the target CE in the ES corresponding to the current PE; the target CE excludes the CE in the ES corresponding to the source PE. The problems of high hardware implementation complexity and low forwarding efficiency in the prior art can be solved by the MPLS-based EVPN BUM message locality priority forwarding method and system.

Description

technical field [0001] The present invention relates to the field of network technology, in particular to a method and system for preferentially forwarding MPLS-based EVPN BUM messages. Background technique [0002] At present, in order to improve the high reliability of the access side, for the Ethernet virtual private network (English: Ethernet Virtual Private Network, referred to as: EVPN) networking, the EVPN protocol stipulates multi-homing access networking, which can be better used for the EVPN protocol. Ensure the reliability of service data packets. The solution using MPLS as the forwarding plane is called MPLS EVPN. [0003] Such as figure 1 In the topology shown, the customer edge device (Custom Edge, CE) 1 can access the network through the service provider router (Provider Edge, PE) 1 and PE2, which is the meaning of multi-homing, ES1 is an ID representing the home; When PE1 and PE2 receive a packet from CE1, they mark the source of the packet as ES1, and con...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L45/745H04L12/46
CPCH04L45/745H04L12/4641
Inventor 崔兴龙冯莹周伟
Owner SUZHOU CENTEC COMM CO LTD