Huawei Quidway NetEngine80E Configuration Manual page 650

HUAWEI NetEngine80E/40E Router
Configuration Guide - IP Routing
As shown in
Distance_opt(B, D) < Distance_opt(B, A) + Distance_opt(A, D). In this inequality, Distance_opt
(X, Y) specifies the shortest path from node X to node Y. After IPv6 IS-IS Auto FRR is
configured, when the link between Router A and Router C becomes faulty, traffic forwarded by
Router A is rapidly switched to the backup link.
Figure 7-3 Networking diagram for IPv6 IS-IS Auto FRR (IP protecting IP)
RouterA
Pre-configuration Tasks
Before configuring IPv6 IS-IS Auto FRR, complete the following tasks:
l
l
l
Data Preparation
To configure IPv6 IS-IS Auto FRR, you need the following data.
No.
1
2
Issue 02 (2014-09-30)
Figure 7-3, the link cost satisfies the traffic protection inequality, namely,
Configuring IP addresses for interfaces to ensure that neighboring nodes are reachable at
the network layer
Configuring IPv6 IS-IS.
Setting costs for links to ensure that the primary link is the optimal path and the backup
link is the sub-optimal path.
Data
IS-IS process ID
Interface to be enabled with IPv6 IS-IS Auto FRR
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
RouterC
RouterB
7 IS-IS Configuration
RouterD
Traffic in normal
Traffic in case of failure
625