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Answers to Chapter 6 Q&A Section 413
20
Configure both routers A and B for basic DDR connectivity using dialer maps. Use basic-
ni1 for the switch type. Include the configuration parameters from Questions 3 and 4.
!RouterA
isdn switch-type basic-ni1
interface e0
ip address 172.16.1.1 255.255.255.0
interface bri0
encapsulation ppp
ip address 172.17.1.1 255.255.255.0
dialer map ip 172.17.1.2 broadcast 9726785677
dialer map ip 172.17.1.2 broadcast 9726785678
ppp Multilink
isdn spid1 97255567890101 9724446789
isdn spid2 97255567880101 9725556788
router rip
network 172.16.0.0
network 172.17.0.0
network 172.18.0.0
passive-interface bri0
exit
ip route 172.19.1.0 255.255.255.0 172.17.1.2
dialer-list 1 protocol ip permit
!RouterB
isdn switch-type basic-ni1
Interface e0
ip address 172.19.1.2 255.255.255.0
interface bri0
encapsulation ppp
ip address 172.17.1.2 255.255.255.0
dialer map ip 172.17.1.1 broadcast 9725556789
dialer map ip 172.17.1.1 broadcast 9725556788
ppp Multilink
isdn spid1 97267856770101 9726785677
isdn spid2 97267856780101 9726785678
exit
router rip
network 172.17.0.0
network 172.18.0.0
network 172.19.0.0
passive-interface bri0
exit
ip route 172.16.1.0 255.255.255.0 172.17.1.1
dialer-list 1 protocol ip permit