两条ISDN备份DDN配置：
Building configuration...
Current configuration : 1707 bytes
!
version 12.2
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname XXXX
!
enable password XXX
!
username XXXX password 0 XXX
ip subnet-zero
!
!
!
isdn switch-type basic-net3
!
!
!
interface BRI2/0
no ip address
encapsulation ppp
dialer pool-member 1
isdn switch-type basic-net3
isdn T310 4000
ppp authentication chap
ppp multilink
!
interface BRI2/1
no ip address
encapsulation ppp
dialer pool-member 1
isdn switch-type basic-net3
isdn T310 4000
ppp authentication chap
ppp multilink
!
interface BRI2/2
no ip address
encapsulation hdlc
shutdown
isdn switch-type basic-net3
!
interface BRI2/3
no ip address
encapsulation hdlc
shutdown
isdn switch-type basic-net3
!
interface FastEthernet3/0
ip address 10.11.2.254 255.255.255.0 secondary
ip address 10.11.1.254 255.255.255.0
duplex auto
speed auto
!
interface Serial3/0
ip address 10.251.2.9 255.255.255.252
encapsulation ppp
!
interface FastEthernet3/1
ip address 10.102.1.254 255.255.255.0
duplex auto
speed auto
!
interface Dialer1
ip address 10.252.2.9 255.255.255.252
encapsulation ppp
dialer pool 1
dialer remote-name benburouter
dialer idle-timeout 60
dialer string XXXXXXX
dialer string XXXXXXX
dialer load-threshold 1 either
dialer-group 1
ppp authentication chap
ppp multilink
!
ip classless
ip route 10.12.1.0 255.255.255.0 10.251.2.10
ip route 10.12.1.0 255.255.255.0 10.252.2.10 100
ip route 10.202.1.0 255.255.255.0 10.251.2.10
ip route 10.202.1.0 255.255.255.0 10.252.2.10 100
ip http server
!
access-list 1 permit any
dialer-list 1 protocol ip list 1
!
line con 0
line aux 0
line vty 0 4
password
login
!
end
