Fast convergence on link failure in multi-homed ethernet virtual private networks

A link failure, multi-homing technology, applied in the field of computer networks, can solve problems such as taking many seconds

Active Publication Date: 2016-07-06
JUMIPER NETWORKS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Again, such a reconfiguration may take many seconds

Method used

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  • Fast convergence on link failure in multi-homed ethernet virtual private networks
  • Fast convergence on link failure in multi-homed ethernet virtual private networks
  • Fast convergence on link failure in multi-homed ethernet virtual private networks

Examples

Experimental program
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Effect test

example 1

[0092] Example 1: A method includes preconfiguring at a first provider edge (PE) network device a primary route to a customer edge (CE) network device and one or more secondary routes to the CE network device, the primary route Using a first communication link between a first PE network device and a CE network device, and one or more secondary routes using one or more other corresponding links between the first PE network device and one or more other PE network devices A communication link where the first PE network device and one or more other PE network devices are configured in fully active mode as part of a segment of a layer 2 virtual bridge, and the CE network device is multihomed to the first PE network device and one or more other PE network devices; receiving at the first PE network device a data packet addressed to the CE network device; detecting, by the first PE network device, a link failure for the primary route; and by the first PE network device The network dev...

example 2

[0093] Example 2: The method according to Example 1, wherein pre-configuring the primary route and one or more secondary routes includes: configuring a next hop list, the next hop list includes an interface next hop for the primary route and for One or more secondary next hops for one or more secondary routes.

example 3

[0094] Example 3: The method of Example 2, further comprising configuring the interface next hop with a low weight in the next hop list such that all networks of the CE network device are addressed when the first communication link is available Traffic is routed via the first communication link; and one or more secondary next hops are configured with a high weight in the next hop list such that network traffic is load balanced when the first communication link is unavailable.

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Abstract

Techniques are described for providing fast convergence in the event of a link failure in an all-active multi-homed Ethernet virtual private network. A provide edge (PE) network device may pre-configure an interface next hop and secondary next hops. The secondary next hops may be logical links to other PE network devices in the same Ethernet segment. In the event of a link failure in the interface next hop between the PE network device and a customer edge (CE) network device, the PE network device may be configured to forward data traffic to the CE network device using the secondary next hops. In the event of a link failure between the PE network device and a core network, the PE network device may be configured to send an out-of-service message to the CE network device that instructs the CE network device to stop sending traffic to the PE network device.

Description

technical field [0001] This disclosure relates to computer networks, and more particularly to routing packets within computer networks. Background technique [0002] A computer network is a collection of interconnected computing devices capable of exchanging data and sharing resources. Example network devices include Layer 2 devices operating within Layer 2 (L2) (i.e., the Data Link layer) of the Open System Interconnection (OSI) Reference Model and Layer 3 (L3) (i.e., Layer 3 devices operating within the network layer). Devices within a computer network often include a control unit that provides control plane functions for the network devices and forwards components for routing or switching data units. [0003] Ethernet Virtual Private Network (EVPN) can be used to extend two or more Remote layer two (L2) client network. In particular, EVPN transports L2 communications (eg, Ethernet packets or "frames") between customer networks via intermediate networks. In a typical ...

Claims

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Application Information

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IPC IPC(8): H04L12/24H04L12/703H04L45/24H04L45/243H04L45/28H04L45/50
CPCH04L41/0654H04L41/0803H04L45/28H04L45/22H04L41/00H04L45/24H04L45/245H04L12/4641
Inventor N·辛格A·弗梅S·M·伊瓦尼M·夏尔马H·霍塞尼P·K·古迪佩蒂
Owner JUMIPER NETWORKS INC
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