HP MSR2000/3000/4000 Router Series Layer 2 - WAN Configuration Guide

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# Enable PPP on interface Serial 2/0.
[RouterB] interface serial 2/0
[RouterB-Serial2/0] link-protocol ppp
[RouterB-Serial2/0] ip address 10.0.0.2 8
[RouterB-Serial2/0] quit
# Configure interface Loopback 1.
[RouterB] interface loopback 1
[RouterB-Loopback1] ip address 30.0.0.1 32
[RouterB-Loopback1] quit
# Configure RIP.
[RouterB] rip
[RouterB-rip-1] network 10.0.0.0
[RouterB-rip-1] network 20.0.0.0
[RouterB-rip-1] network 30.0.0.0
[RouterB-rip-1] import-route direct
Configuration example for dynamic route backup monitoring
multiple network segments
Network requirements
As shown in Figure 51, Router A and Router B are directly connected through serial interfaces running PPP.
They are also connected through an ISDN switched network, enabling them to call each other by B-DDR.
The telephone number of Router A is 660330, and that of Router B is 660220.
Configure dynamic route backup on Router A to monitor the network segments 10.0.0.1/8, 11.0.0.1/8,
and 12.0.0.1/8, which are all connected to Router B.
Generally, the PPP link functions as the primary link between Router A and Router B. When the routes to
all the three network segments become invalid, Router A automatically dials an ISDN BRI link to Router
B.
Figure 51 Network diagram
This network diagram only illustrates a simple application where a dynamic route backup group is used
to monitor multiple subnets. In actual use, the monitored network segments can be connected to multiple
devices.
Eth1/1
11.0.0.1/8
Eth1/2
12.0.0.1/8
ISDN
Router A
S2/0
1.0.0.1/8
Router B
S2/0
1.0.0.2/8
Eth1/0
10.0.0.1/8
S2/1:15
2.0.0.1/8
S2/1:15
2.0.0.2/8