Dcc Application Using Isdn Bri Interface To Dial And Providing Leased Line - 3Com 3C13636 Configuration Manual

3Com Router 3000 Ethernet Family
Configuration Guide
[3Com-Serial0/0/0:15] ppp pap local-user userb password simple userb
1.4.3 DCC Application Using ISDN BRI Interface to Dial and Providing
Leased Line
I. Network requirements
To implement C-DCC, use a B channel on the ISDN BRI interface to provide a leased
line, and another B channel to implement remote dialing connection.
As shown in the following figure, the B2 channel on the interface Bri0/0/0 of RouterA is
connected to the B1 channel on the interface Bri0/0/0 of RouterC to provide a leased
line, whereas the B1 channel is connected to RouterB through dialup.
In the ISDN network, configure on the switches connected to RouterA and RouterC a
semipermanent connection from 8810148 to 8810152, ensuring that both RouterA and
RouterC can set up virtual circuit connections to the ISDN network. RouterA adopts
C-DCC to call RouterB and RouterC, so do RouterB and RouterC. The addresses of
RouterA, RouterB and RouterC are respectively 100.1.1.1, 100.1.1.2, and 100.1.1.3.
II. Network diagram
Router A
Figure 1-12 DCC using the ISDN BRI interface to provide dial and a leased line
simultaneously
III. Configuration procedure
1) Configure RouterA
[3Com] dialer-rule 1 ip permit
[3Com] interface bri 0/0/0
[3Com-Bri0/0/0] ip address 100.1.1.1 255.255.255.0
[3Com-Bri0/0/0] dialer enable-circular
[3Com-Bri0/0/0] dialer isdn-leased 1
[3Com-Bri0/0/0] dialer-group 1
[3Com-Bri0/0/0] dialer route ip 100.1.1.2 8810152
2) Configure RouterB
[3Com] dialer-rule 2 ip permit
[3Com] interface bri 1/0/0
[3Com-Bri1/0/0] ip address 100.1.1.2 255.255.255.0
[3Com-Bri1/0/0] dialer enable-circular
Bri0/0/0
8810148
ISDN
NT1
3Com Corporation
Bri1/0/0
8810152
NT1
Bri0/0/0
NT1
1-47
Chapter 1 DCC Configuration
Router B
Router C