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三 廣域網(wǎng)協(xié)議設(shè)置( 三 )

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shutdown
!
interface BRI0
no ip address
no ip mroute-cache
shutdown
!
router eigrp 200
network 16.0.0.0
!
ip classless
!
dialer-list 1 protocol ip permit
!
line con 0
line 2
script dialer cisco-default
script reset reset
modem InOut
modem autoconfigure discovery
rxspeed 38400
txspeed 38400
flowcontrol hardware
line aux 0
line vty 0 4
password cisco
login
!
end
c2522rb#
4.異步撥號備份X.25:
設(shè)置X.25的撥號備份,首先X.25連接的端口必須運行動態(tài)路由協(xié)議,異步撥號口必須使用靜態(tài)路由.本例選擇EIGRP作為路由選擇協(xié)議,將靜態(tài)路由的Metric的值設(shè)置為200,由于EIGRP的默認Metric為90,所以當(dāng)同時有兩條路徑通往同一網(wǎng)段時,其中Metric值小的路徑生效,而當(dāng)X.25連接出現(xiàn)問題時,路由器無法通過路由協(xié)議學(xué)習(xí)到路由表 ， 則此時靜態(tài)路由生效 ， 訪問通過撥號端口實現(xiàn) 。當(dāng)X.25連接恢復(fù)正常時 ， 路由器又可以學(xué)習(xí)到路由表 ， 則由于 Metric值的不同 ， 靜態(tài)路由自動被動態(tài)路由所代替 ， 這樣就實現(xiàn)了備份的功能 。
路由器Router1配置如下:
hostname router1
!
enable secret 5 $1$UTvD$99YiY2XsRMxHudcYeHn.Y.
enable password cisco
!
username router2 password cisco
ip subnet-zero
chat-script cisco-default "" "AT" TIMEOUT 30 OK "ATDT T" TIMEOUT 30 CONNECT c
chat-script reset atz
interface Ethernet0
ip address 202.96.38.100 255.255.255.0
!
interface Serial0
ip address 202.96.0.1 255.255.255.0
encapsulation x25
x25 address 10112227
x25 htc 16
x25 map ip 202.96.0.2 10112225 broadcast
!
interface Serial1
no ip address
shutdown
!
!
interface Async 1
ip address 202.96.1.1 255.255.255.252
encapsulation ppp
dialer in-band
dialer idle-timeout 60
dialer map ip 202.96.1.2 name router2 modem-script cisco-default 2113470
dialer-group 1
ppp authentication chap
!
router eigrp 200
redistribute connected
network 202.96.0.0
!
ip route 202.96.37.0 255.255.255.0 202.96.1.2 200
dialer-list 1 protocol ip permit
line con 0
line aux 0
script dialer cisco-default
script reset reset
modem InOut
modem autoconfigure discovery
transport input all
rxspeed 38400
txspeed 38400
flowcontrol hardware
line vty 0 4
password cisco
login
!
end
路由器Router2配置如下:
hostname router2
!
enable secret 5 $1$T4IU$2cIqak8f/E4Ug6dLT0k.J0
enable password cisco
!
username router1 password cisco
ip subnet-zero
chat-script cisco-default "" "AT" TIMEOUT 30 OK "ATDT T" TIMEOUT 30 CONNECT c
chat-script reset atz
!
interface Ethernet0
ip address 202.96.37.100 255.255.255.0
!
interface Serial0
ip address 202.96.0.2 255.255.255.0
no ip mroute-cache
encapsulation x25
x25 address 10112225
x25 htc 16
x25 map ip 202.96.0.1 10112227 broadcast
!
interface Serial1
no ip address
shutdown
!
interface Async1
ip address 202.96.1.2 255.255.255.252
encapsulation ppp
keepalive 30
async default routing
async mode dedicated
dialer in-band
dialer idle-timeout 60
dialer wait-for-carrier-time 120
dialer map ip 202.96.1.1 name router1 modem-script cisco-default 2113469
dialer-group 1
ppp authentication chap
!
router eigrp 200
redistribute static
network 202.96.0.0
!
no ip classless
ip route 202.96.38.0 255.255.255.0 202.96.1.1 200
dialer-list 1 protocol ip permit

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