Huawei AR2200-S Series Configuration Manual page 60

Huawei AR2200-S Series Enterprise Routers
Configuration Guide - Reliability
Networking Requirements
As shown in
connects to the IP network through GE1/0/0. The link between GE1/0/0 and the IP network is
used as the primary link, and the link between PRI1/0/0:15 (ISDN interface) and the ISDN is
used as the backup link. To prevent service interruption due to faults on the primary link,
associate interface backup with BFD on RouterA. When the BFD session detects faults on the
primary link, it reports faults to the interface backup module. The interface backup module then
switches traffic to the backup link of PRI1/0/0:15.
Figure 1-15 Networking diagram of association between interface backup and BFD
Headquarters of
company A
Configuration Roadmap
The configuration roadmap is as follows:
1. Configure IP addresses for interfaces on routes along the primary link and static routes to
ensure connectivity at the network layer.
2. Configure C-DCC on RouterA and RouterB and configure dialer numbers 600501 and
600502 so that RouterA can initiate calls to and receive calls from RouterB.
3. Configure BFD sessions on RouterA and RouterB.
4. Associate interface backup with BFD on backup interface PRI1/0/0:15 of RouterA.
Data Preparation
To complete the configuration, you need the following data:
l IP addresses of interfaces on RouterA, RouterB, RouterC, and RouterD, dialer numbers,
and static routes
l BFD session name
l Peer IP address for each BFD session
l Local and remote discriminators of BFD sessions
Issue 01 (2012-01-06)
Figure 1-15, the egress gateway RouterA in the headquarters of company A
GE1/0/0
2.1.1.2/24
RouterC
GE1/0/0
2.1.1.1/24
RouterA
PRI1/0/0:15
IP:3.1.1.1/24
ISDN:600501
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1 Interface Backup Configuration
IP
GE1/0/0
4.1.1.1/24
RouterD
GE1/0/0
4.1.1.2/24
RouterB
PRI1/0/0:15
IP:3.1.1.2/24
ISDN
ISDN:600502
Branch of
company A
Primary link
Backup link
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