Huawei Quidway NetEngine80E Configuration Manual page 883

HUAWEI NetEngine80E/40E Router
Configuration Guide - IP Routing
In a traditional forwarding mode, the router selects an optimal route out of several routes destined
for the same network and delivers the optimal route to the FIB table for data forwarding. If the
optimal route fails, the router can reselect an optimal route only after routes are converged.
During this period, services are interrupted. After the router delivers the reselected optimal route
to the FIB table, services are restored. Service interruption in this mode lasts a long time, which
cannot meet service requirements.
After BGP Auto FRR is enabled on the router, the router selects an optimal route from the routes
destined for the same network. In addition, the router automatically adds information about the
second optimal route to the backup forwarding entries of the optimal route and delivers the
backup forwarding entries to the FIB table. If the primary link fails, the router switches traffic
to the backup link immediately. The switchover completes within sub-seconds because it does
not depend on route convergence.
Pre-configuration Tasks
Before configuring BGP Auto FRR,
Data Preparation
To configure BGP Auto FRR, you need the following data.
No.
1
Procedure
Step 1 Run:
system-view
The system view is displayed.
Step 2 Run:
bgp { as-number-plain | as-number-dot }
The BGP view is displayed.
Step 3 Run:
ipv4-family unicast
The BGP IPv4 unicast address family view is displayed.
Step 4 Run:
auto-frr
BGP Auto FRR for unicast routes is enabled.
By default, BGP Auto FRR is disabled for unicast routes.
Issue 02 (2014-09-30)
configure basic BGP
Data
IP address family for which BGP Auto FRR needs to be configured
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8 BGP Configuration
Functions.
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