配置实例：
maui-rtr-10 (Client)
maui-rtr-10#show running-config
Building configuration...
Current configuration:
!
version 12.1
service timestamps debug datetime msec
service timestamps log datetime msec
no service passWord-encryption
!
hostname maui-rtr-10
!
aaa new-model
aaa authentication login default local
aaa authentication login NO_AUTHEN none
aaa authentication ppp default local
!--- This is the basic AAA configuration for ppp calls
enable secret 5
!
username admin password 0
username maui-rtr-11 password 0 cisco
!--- Username for remote router (maui-rtr-11) and shared secret password Shared
!--- secret (used for CHAP authentication)must be the same on both sides
!
ip subnet-zero
!
chat-script Dialout ABORT ERROR ABORT BUSY "" "AT" OK "ATDT \T" TIMEOUT 45 CONNECT \c
!--- chat script named "Dialout" is used for the backup dialout.
modemcap entry MY_USR_MODEM:MSC=&F1S0=1
!--- Modemcap named "MY_USR_MODEM" will be applied to the AUX port line interface.
!--- This modemcap was created using the command:
!--- modemcap edit MY_USR_MODEM miscellaneous &F1S0=1
!--- Refer to the Modem-Router Connection Guide for more information
!
interface Loopback0
ip address 172.17.1.1 255.255.255.0
!
interface Ethernet0/0
ip address 172.16.1.1 255.255.255.0
no keepalive
!
interface Serial0/0
no ip address
shutdown
no fair-queue
!
interface Serial0/1
!--- Primary Link
ip address 192.168.10.2 255.255.255.252
encapsulation ppp
clockrate 64000
ppp authentication chap
!
interface Async65
!--- Async interface corresponding to the AUX Port(backup link)
!--- This was determined using the show line command
ip unnumbered Loopback0
!--- This assigns the loopback 0 ip address to this interface.
!--- The central router will have a dialer map to this loopback address
encapsulation ppp
dialer in-band
!--- Allow DDR on this interface
dialer idle-timeout 30
!--- idle timeout(in seconds)for this link
!--- dialer watch checks the status of the primary link
!--- every time the idle-timeout eXPires
dialer watch-disable 15
!--- delays disconnecting the backup interface (for 15 seconds)after
!--- the primary interface is found to be up
dialer map ip 172.22.1.1 name maui-rtr-11 broadcast 84007
!--- dialer map for the AUX Port interface of the central router
!--- Remember that the central router's AUX port is unnumbered to its Loopback 0
dialer map ip 172.22.53.0 name maui-rtr-11 broadcast 84007
!--- map statement for the route/network being watched
!--- address must exactly match the network configured with
!--- the dialer watch-list command
!--- dials the phone number specified when the watched route disappears
dialer watch-group 8
!--- Enable dialer watch on this backup interface
!--- Watch the route specified with dialer watch-list 8
dialer-group 1
!--- apply interesting traffic defined in dialer-list 1
async default routing
!--- permit routing over the async interface
!--- this is required for a routing protocol to run across the async link
async mode interactive
ppp authentication chap
!
router ospf 5
network 172.16.1.0 0.0.0.255 area 0
network 172.17.1.0 0.0.0.255 area 0
network 192.168.10.0 0.0.0.3 area 0
!
ip classless
no ip http server
!
Access-list 101 remark Define Interesting Traffic
access-list 101 deny ospf any any
!--- Mark OSPF as uninteresting
!--- This will prevent OSPF hellos from keeping the link up
access-list 101 permit ip any any
!
dialer watch-list 8 ip 172.22.53.0 255.255.255.0
!--- define the route to be watched
!--- this exact route(including subnet mask) must exist in the routing table
dialer-list 1 protocol ip list 101
!--- interesting traffic is defined by access-list 101
!--- This is applied to BRI0 using dialer-group 1
!
line con 0
login authentication NO_AUTHEN
transport input none
line Aux 0
!--- line configuration for the AUX port
exec-timeout 0 0
!--- disable exec timeout on the interface
autoselect ppp
script dialer Dialout
!--- Use the chat script named "Dialout" for outgoing calls.
modem InOut
!--- enable incoming and outgoing calls
modem autoconfigure type MY_USR_MODEM
!--- Apply the modemcap MY_USR_MODEM (configured previously) to initalize the modem.
transport input all
stopbits 1
!--- Improve throughput by redUCing async framing overhead.
speed 115200
!--- AUX port on the 2600 supports a speed of 115200.
!--- Note: If you are routing through the AUX port, each character generates a
!--- processor interrupt. This is an abnormally high load on the CPU, which can be
!--- resolved by using a lower AUX port speed.
flowcontrol hardware
!--- This configures RTS/CTS flow control.
line vty 0 4
!
no scheduler allocate
end
maui-rtr-11 (Central Site)
maui-rtr-11#show running-config
Building configuration...
Current configuration:
!
version 12.1
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname maui-rtr-11
!
aaa new-model
aaa authentication login default local
aaa authentication login NO_AUTHEN none
aaa authentication ppp default local
!--- This is the basic AAA configuration for ppp calls
enable secret 5
!
username admin password 0
username maui-rtr-10 password 0 cisco
!--- Username for remote router (maui-rtr-10) and shared secret!--- Shared secret(used for CHAP authentication) must be the same on both sides
!
memory-size iomem 30
!
ip subnet-zero
!
modemcap entry MY_USR_MODEM:MSC=&F1S0=1
!--- Modemcap (MY_USR_MODEM) will be applied to the AUX port line interface
!--- This modemcap was created using the command:
!--- modemcap edit MY_USR_MODEM miscellaneous &F1S0=1
!--- Refer to the Modem-Router Connection Guide for more information
!
interface Loopback0
ip address 172.22.1.1 255.255.255.0
!
interface FastEthernet0/0
!--- Interface to corporate network
ip address 172.22.53.105 255.255.255.0
no keepalive
duplex auto
speed auto
!
!
!
interface Serial0/1
!--- Primary Link
ip address 192.168.10.1 255.255.255.252
encapsulation ppp
ppp authentication chap
!
interface Serial0/2
no ip address
shutdown
!
interface Async65
!--- Async interface corresponding to the AUX Port(backup link)
!--- This was determined using the show line command
ip unnumbered Loopback0
!--- Use Loopback 0 address for this interface
!--- The remote router will have a dialer map to this loopback address
encapsulation ppp
dialer in-band
dialer idle-timeout 900
dialer map ip 172.17.1.1 name
