3Com MSR 50 Series Configuration Manual page 193

On Router A, the B2 channel on interface BRI 1/0 is connected to the B1
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channel on interface BRI 1/0 on Router C to provide a leased line, whereas the
B1 channel is connected to Router B through dialup.
Interface BRI 1/0 on Router A is assigned the IP address of 100.1.1.1/24,
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interface BRI 1/0 on Router B the IP address of 100.1.1.2/24, and interface BRI
1/0 on Router C the IP address of 100.1.1.3/24.
In the ISDN network, virtual circuit mappings are set up on the switches
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connected to Router A and Router to ensure that they can connect to the ISDN
network.
Configure C-DCC to allow Router A to call Router B and Router C and vice versa.
Network diagram
Figure 27 Network diagram for using DCC with dialup ISDN BRI and leased line
Router A
BRI1/0
100 .1.1.1/24
Configuration procedure
1 Configure Router A
<RouterA> system-view
[RouterA] dialer-rule 1 ip permit
[RouterA] interface bri 1/0
[RouterA-Bri1/0] ip address 100.1.1.1 255.255.255.0
[RouterA-Bri1/0] dialer isdn-leased 1
[RouterA-Bri1/0] dialer enable-circular
[RouterA-Bri1/0] dialer-group 1
[RouterA-Bri1/0] dialer route ip 100.1.1.2 8810052
2 Configure Router B
<RouterB> system-view
[RouterB] dialer-rule 2 ip permit
[RouterB] interface bri 1/0
[RouterB-Bri1/0] ip address 100.1.1.2 255.255.255.0
[RouterB-Bri1/0] dialer enable-circular
[RouterB-Bri1/0] dialer-group 2
[RouterB-Bri1/0] dialer route ip 100.1.1.1 8810048
3 Configure Router C
<RouterC> system-view
[RouterC] interface bri 1/0
[RouterC-Bri1/0] ip address 100.1.1.3 255.255.255.0
NT 1
8810048
ISDN
DCC Configuration Example
NT 1
BRI1/0
100 .1.1.2/24
8810052
NT 1
BRI1/0
100 .1.1.3/24
193
Router B
Router C