Example For Configuring Bgp Auto Frr - Huawei Quidway NetEngine80E Configuration Manual

HUAWEI NetEngine80E/40E Router
Configuration Guide - IP Routing

8.28.12 Example for Configuring BGP Auto FRR

BGP Auto FRR provides backup forwarding entries for the optimal route, minimizing the delay
for important services.
Networking Requirements
As networks evolve continuously, voice, on-line video, and financial services raise increasingly
high requirements for real-time performance. Usually, primary and backup links are deployed
on a network to ensure the stability of these services. If the primary link fails, the Router needs
to wait for route convergence to be completed. After that, the Router reselects an optimal route
and delivers the reselected route to the FIB table to start a link switchover. This is the traditional
switchover mode. In this mode, service interruption lasts a long time, which does not meet the
services' requirement.
BGP Auto FRR addresses this problem. After BGP Auto FRR is enabled on a Router, the
Router selects the optimal route to forward packets. 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
quickly switches traffic to the backup link. The switchover does not depend on route
convergence. Therefore, the service interruption time is very short, reaching the sub-second
level.
As shown in
network 4.4.4.4/32. It is required that traffic be transmitted on LinkA, the primary link, under
normal circumstances and quickly switched to LinkB, the backup link, in the case that LinkA
fails.
Issue 02 (2014-09-30)
#
interface Gigabitethernet2/0/0
undo shutdown
ip address 9.1.1.2 255.255.255.0
#
bgp 200
router-id 3.3.3.3
peer 9.1.1.1 as-number 200
peer 200.1.2.1 as-number 100
peer 200.1.2.1 ebgp-max-hop 255
#
ipv4-family unicast
undo synchronization
peer 9.1.1.1 enable
peer 200.1.2.1 enable
peer 200.1.2.1 route-policy 10 export
#
route-policy 10 permit node 10
apply cost 150
#
return
Figure 8-40, Router A resides in AS 100. There are two paths that can reach the
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8 BGP Configuration
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