CCNA Cisco Certified Network Associate Study Guide - FTP Server

530 Chapter 10 � Wide Area Networking Protocols
4. Set the SPIDs on 804B and make the IP address of the interface
172.16.60.2/24.
804A#config t
804A(config)#int bri0
804A(config-if)#isdn spid 1 0835866201 ldn 8358662
804A(config-if)#isdn spid 2 0835866401 ldn 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 recommended
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 dialergroup
1, which matches the dialer-list number.
804B(config)#config t
804B(config)#int bri0
804B(config)#dialer-group 1