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Method, device and system for forwarding messages

A message forwarding and message technology, applied in the field of network communication, can solve the problem of bearer network bandwidth waste

Active Publication Date: 2014-12-31
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] During the forwarding of BUM packets, if there is multi-homing in the E-VPN, each egress PE does not finally send the BUM packets sent by the ingress PE to the remote site. bandwidth waste

Method used

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  • Method, device and system for forwarding messages
  • Method, device and system for forwarding messages

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0091] The first BGP UPDATE message is sent to the Ingress PE when the Egress PE determines that the state of the EVI on the Egress PE is Active. For the format of the first BGP UPDATE message described in this example, please refer to the attached Figure 4a shown. The first BGP UPDATE message includes a first E-VPN NLRI, and the first E-VPN NLRI includes a first route type (Route Type) field (attached Figure 4a "Route Type" field) and the first RD field (attached Figure 4a The "route identifier" field in ), the content of the first route type field is 3 (that is, it indicates that the E-VPN NLRI is an Inclusive Multicast Ethernet Tag Route type message object, which contains EVI), and the first RD The field carries the RD of the EVI on the first egress PE.

[0092] The first RD field is carried in the attached Figure 4a In a set of fixed-format data structures in the route type specific data (Route Type specific) field, the data structure also includes the Ethernet Ta...

example 2

[0096] For the format of the first BGP UPDATE message described in this example, please refer to the attached Figure 4b shown. The first BGP UPDATE message includes the first E-VPN network layer reachability information NLRI, and the first E-VPN NLRI includes the first route type (Route Type) field (attached Figure 4b "Route Type" field in), the first RD field (attached Figure 4b "Route Identifier" field in ) and the first status indication field (attached Figure 4b "S" field in ), the content of the first route type field indicates that the first E-VPN NLRI carries the state information of EVI, and the first RD field carries all the information on the first Egress PE For the RD of the EVI, when the content of the first state indication field is the first value, it indicates that the state of the EVI corresponding to the RD is Active. Further, when the content of the first status indication field is the second value, it indicates that the status of the EVI is Inactive. ...

example 3

[0102] For the format of the first BGP UPDATE message described in this example, please refer to the attached Figure 4c shown. The first BGP UPDATE message includes the first E-VPN NLRI and the first extended community attribute corresponding to the first E-VPN NLRI (that is, the first extended community attribute is used to describe the first E-VPN Attributes and characteristics of NLRI), the first E-VPN NLRI includes the first route discriminator RD field (attached Figure 4c "Route Distinguisher" field), the first extended community attribute includes the first type (Type) field (attached Figure 4c "Type (to be determined)" field) and the first status indication field, the content of the first type field indicates that the first extended community attribute carries EVI status information, and the first RD field carries the The RD of the EVI on the first Egress PE indicates that the state of the EVI corresponding to the RD is Active when the content of the first state in...

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Abstract

The invention discloses a method for forwarding messages. The method includes that an Ingress PE (provider edge) in an EVI (ether virtual private network instance) determines the state of the EVI on a first Egress PE to be active, and an E-VPN (ether virtual private network) corresponding to the EVI comprises a first CE (client edge); the Ingress PE determines the state of the EVI on a second Egress PE to be inactive; the Ingress PE omits to forward a BUM (broadcast, unknown single-cast and multi-cast) message to the second Egress PE, and the BUM message is from the first CE; the Ingress PE forwards the BUM message to the first Egress PE. By the method, repeated BUM flow, not sent to a far-end site in the end, transmitted in a bearer network is reduced, so that bandwidth waste in the bearer network is reduced.

Description

technical field [0001] The invention relates to the technical field of network communication, in particular to a message forwarding method, a message forwarding device and a message forwarding system. Background technique [0002] Ethernet virtual private network (Ether Virtual Private Network, referred to as E-VPN) is based on Internet Protocol (Internet Protocol, referred to as IP) and multi-protocol label switching (Multi-protocol Label Switching, referred to as MPLS) The technology of connecting customer sites so that users in different regions can work as if they are in the same site, where the customer site can be a local area network (Local Area Network, LAN for short). [0003] E-VPN consists of an operator's IP / MPLS bearer network and multiple customer sites. Each customer site is isolated from each other and can only communicate with each other through the IP / MPLS bearer network. For ease of understanding, the attached figure 1 A schematic diagram of the structur...

Claims

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Application Information

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IPC IPC(8): H04L12/801H04L12/46H04L45/50H04L45/74
CPCH04L12/6418H04L12/66H04L61/5007H04L45/50H04L45/74H04L49/351H04L69/325
Inventor 张军林李振斌
Owner HUAWEI TECH CO LTD
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