北京配置：
show run
Building configuration...
Current configuration:
!
version 12.0
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname Beijing
!
!
username beijing password 0 cisco
ip subnet-zero
isdn switch-type basic-net3
!
!
!
interface Loopback0
ip address 2.2.2.2 255.0.0.0
no ip directed-broadcast
!
interface Loopback1
no ip address
no ip directed-broadcast
!
interface Ethernet0
no ip address
no ip directed-broadcast
shutdown
!
interface Serial0
backup interface Dialer1
ip address 192.168.10.1 255.255.255.0
no ip directed-broadcast
no ip mroute-cache
no fair-queue
!
interface Serial1
no ip address
no ip directed-broadcast
shutdown
!
interface Serial2
no ip address
no ip directed-broadcast
shutdown
--More-- !
interface Serial3
no ip address
no ip directed-broadcast
shutdown
!
interface Serial4
no ip address
no ip directed-broadcast
shutdown
!
interface Serial5
no ip address
no ip directed-broadcast
shutdown
!
interface Serial6
no ip address
no ip directed-broadcast
shutdown
!
interface Serial7
no ip address
--More-- no ip directed-broadcast
shutdown
!
interface Serial8
no ip address
no ip directed-broadcast
shutdown
!
interface Serial9
no ip address
no ip directed-broadcast
shutdown
!
interface BRI0
no ip address
no ip directed-broadcast
encapsulation ppp
dialer pool-member 1
isdn switch-type basic-net3
!
interface Dialer1
ip address 192.168.11.1 255.255.255.0
no ip directed-broadcast
encapsulation ppp
dialer remote-name Shanghai
dialer string 12
dialer pool 1
dialer-group 1
ppp authentication chap
ppp chap password 7 13061E010803
!
ip nat translation timeout never
ip nat translation tcp-timeout never
ip nat translation udp-timeout never
ip nat translation finrst-timeout never
ip nat translation syn-timeout never
ip nat translation dns-timeout never
ip nat translation icmp-timeout never
ip classless
ip route 1.0.0.0 255.0.0.0 Serial0
ip route 1.0.0.0 255.0.0.0 Dialer1 200
ip route 192.168.11.0 255.255.255.0 Serial0
ip route 192.168.11.0 255.255.255.0 Dialer1 200
!
access-list 101 permit icmp any any
dialer-list 1 protocol ip list 101
--More-- !
line con 0
transport input none
line aux 0
line vty 0 4
login
!
end
上海配置：
Shanghaien
Password:
Shanghai#show run
Building configuration...
Current configuration:
!
version 12.0
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname Shanghai
!
enable password cisco
!
username shanghai password 0 cisco
username name
username cisco
ip subnet-zero
isdn switch-type basic-net3
!
!
!
interface Loopback0
ip address 1.1.1.1 255.0.0.0
no ip directed-broadcast
--More-- !
interface Ethernet0
no ip address
no ip directed-broadcast
shutdown
!
interface Serial0
no ip address
no ip directed-broadcast
no ip mroute-cache
shutdown
no fair-queue
!
interface Serial1
backup interface Dialer1
backup load 60 5
ip address 192.168.10.2 255.255.255.0
no ip directed-broadcast
clockrate 64000
!
interface BRI0
no ip address
no ip directed-broadcast
--More-- encapsulation ppp
dialer pool-member 1
isdn switch-type basic-net3
!
interface Dialer0
no ip address
no ip directed-broadcast
no cdp enable
!
interface Dialer1
ip address 192.168.11.2 255.255.255.0
no ip directed-broadcast
encapsulation ppp
dialer remote-name Beijing
dialer string 11
dialer pool 1
dialer-group 1
ppp authentication chap
ppp chap hostname Beijing
ppp chap password 7 14141B180F0B
!
ip classless
ip route 2.0.0.0 255.0.0.0 Serial1
--More--
ip route 2.0.0.0 255.0.0.0 Dialer1 200
ip route 192.168.11.0 255.255.255.0 Serial1
ip route 192.168.11.0 255.255.255.0 Dialer1 200
!
access-list 101 permit tcp any any
access-list 101 permit icmp any any
dialer-list 1 protocol ip list 101
!
line con 0
transport input none
line aux 0
line vty 0 4
password cisco
login
!
end
Shanghai#
