176
[RouterA-Serial2/0] link-protocol x25 dte ietf
[RouterA-Serial2/0] x25 x121-address 10
[RouterA-Serial2/0] x25 map ip 10.0.0.2 x121-address 15 broadcast
[RouterA-Serial2/0] ip address 10.0.0.1 8
[RouterA-Serial2/0] quit
# Configure RIP.
[RouterA] rip
[RouterA-rip-1] network 10.0.0.0
[RouterA-rip-1] network 20.0.0.0
[RouterA-rip-1] import-route direct
[RouterA-rip-1] quit
# Create a dynamic route backup group.
[RouterA] standby routing-rule 1 ip 30.0.0.1 32
# Configure the routes used by the serial interface to adopt higher priorities over those used by
the dialup interface.
[RouterA] interface bri 3/0
[RouterA-Bri3/0] rip metricin 2
# Enable dynamic route backup.
[RouterA-Bri3/0] standby routing-group 1
2. Configure Router B:
# Enable X.25 switching on Router B.
<RouterB> system-view
[RouterB] x25 switching
# Configure Serial 2/0 and Serial 2/1 as X.25 interfaces.
[RouterB] interface serial 2/0
[RouterB-Serial2/0] link-protocol x25 dce ietf
[RouterB-Serial2/0] quit
[RouterB] interface serial 2/1
[RouterB-Serial2/1] link-protocol x25 dce ietf
[RouterB-Serial2/1] quit
# Configure switching information for X.25.
[RouterB] x25 switch svc 10 interface serial 2/0
[RouterB] x25 switch svc 15 interface serial 2/1
3. Configure Router C:
# Create a dialer access group rule.
<RouterC> system-view
[RouterC] dialer-rule 1 ip permit
# Configure dialup parameters for interface BRI 3/0.
[RouterC] interface bri 3/0
[RouterC-Bri3/0] ip address 20.0.0.2 8
[RouterC-Bri3/0] dialer enable-circular
[RouterC-Bri3/0] dialer-group 1
[RouterC-Bri3/0] quit
# Configure interface Serial 2/1 and enable X.25 encapsulation on the interface.
[RouterC] interface serial 2/1
[RouterC-Serial2/1] link-protocol x25 dte ietf
[RouterC-Serial2/1] x25 x121-address 15
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