Router-To-Router Callback For Dcc - 3Com 3C13636 Configuration Manual

3Com Router 3000 Ethernet Family
Configuration Guide
[3Com-Bri1/0/0] dialer-group 2
[3Com-Bri1/0/0] dialer route ip 100.1.1.1 8810148
3) Configure RouterC
[3Com] dialer-rule 1 ip permit
[3Com] interface bri 0/0/0
[3Com-Bri0/0/0] ip address 100.1.1.3 255.255.255.0
[3Com-Bri0/0/0] dialer enable-circular
[3Com-Bri0/0/0] dialer isdn-leased 0
[3Com-Bri0/0/0] dialer-group 1
[3Com-Bri0/0/0] dialer route ip 100.1.1.1 8810148

1.4.4 Router-to-Router Callback for DCC

I. Network requirements
Two routers realize PPP callback via the serial interfaces across PSTN, and ISDN
callback with the ISDN caller identification technique across ISDN.
As shown in the following figure, in the C-DCC implementation, RouterA and RouterB
are interconnected via the serial interfaces across PSTN, RouterC and RouterD are
interconnected via ISDN BRI/PRI interfaces across ISDN. RouterA and RouterC are
specified to be the callback clients, while RouterB and RouterD are callback servers.
RouterA and RouterC use the same address 100.1.1.1, whereas RouterB and RouterD
use the same address 100.1.1.2.
II. Network diagram
Router A Router A
Callback Client Callback Client
Router C Router C
Callback Client Callback Client
Figure 1-13 Network for the DCC application providing router-to-router callback
III. Configuration procedure
Solution 1: Use C-DCC to implement PPP callback. The server determines the callback
client by the username configured by the command dialer route.
1) Configure RouterA
[3Com] dialer-rule 1 ip permit
Serial0/0/0 Serial0/0/0
8810048 8810048
Modem Modem
PPP callback networking PPP callback networking
Bri0/0/0 Bri0/0/0
8810148 8810148
ISDN ISDN
NT1 NT1
ISDN caller ID callback networking ISDN caller ID callback networking
3Com Corporation
1-48
Chapter 1 DCC Configuration
Serial1/0/0 Serial1/0/0
8810052 8810052
PSTN PSTN
Modem Modem
Bri1/0/0 Bri1/0/0
8810152 8810152
NT1 NT1
Router B Router B
Callback Server Callback Server
Router D Router D
Callback Server Callback Server