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Chapter 10
Wide Area Networking Protocols
804A(config-if)#
isdn spid 1 0835866201 8358662
804A(config-if)#
isdn spid 2 0835866401 8358664
804A(config-if)#
ip address 172.16.60.2 255.255.255.0
804A(config-if)#
no shut
5.
Create static routes on the routers to use the remote ISDN interface.
Dynamic routing will create two problems: (1) the ISDN line will
always stay up, and (2) a network loop will occur because of multiple
links between the same location. The CCNA exam only discusses
distant vector routing protocols (RIP and IGRP). Static routes are rec-
ommended with ISDN.
804A(config)#
ip route 172.16.50.0 255.255.255.0
172.16.60.2
804A(config)#
ip route 172.16.60.2 255.255.255.255 bri0
804B(config)#
ip route 172.16.30.0 255.255.255.0
172.16.60.1
804B(config)#
ip route 172.16.60.1 255.255.255.255 bri0
6.
Specify interesting traffic to bring up the ISDN link. Let's choose all IP
traffic. This is a global configuration mode command.
804A(config)#
dialer-list 1 protocol ip permit
804B(config)#
dialer-list 1 protocol ip permit
7.
Under the BRI interface of both routers, add the command
dialer-
group 1
, which matches the dialer-list number.
804B(config)#
config t
804B(config)#
int bri0
804B(config)#
dialer-group 1
8.
Configure the dialer information on both routers.
804A#
config t
804A(config)#
int bri0
804A(config-if)#
dialer string 8358662
804B#
config t
804B(config)#
int bri0
804B(config-if)#
dialer string 8358661
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