思科CCNA中文教程--第十三章拨号备份.pdf

第十三章拨号备份
. 自动拨号备份
提问当广域网链路中断得时候自动拨号恢复备份链路
回答
Router1#configure terminal
Enter mands, one per line. End TL/Z.
Router1(config)#interface BRI0/0
Router1(config-if)#ip address
Router1(config-if)#encapsulation ppp
Router1(config-if)#dialer idle-timeout 300
Router1(config-if)#dialer map ip name dialhost broadcast 95551212
Router1(config-if)#dialer load-threshold 50 either
Router1(config-if)#dialer-group 1
Router1(config-if)#isdn switch-type basic-ni
Router1(config-if)#isdn spid1 800555123400 5551234
Router1(config-if)#isdn spid2 800555123500 5551235
Router1(config-if)#ppp authentication chap
Router1(config-if)#ppp multilink
Router1(config-if)#exit
Router1(config)#username dialhost password dialpassword
Router1(config)#ip route 180
Router1(config)#dialer-list 1 protocol ip list 101
Router1(config)#access-list 101 deny eigrp any any
Router1(config)#access-list 101 permit ip any any
Router1(config)#router eigrp 55
Router1(config-router)#network
Router1(config-router)#end
Router1#
注释 isdn switch-type 定义对端 ISDN 交换机类型,中国用 3。通过 Router1#show isdn status
来查看当前状态
Router1#show isdn status
Global ISDN Switchtype = basic-ni
ISDN BRI1/0 interface
dsl 8, interface ISDN Switchtype = basic-ni
Layer 1 Status:
ACTIVE
Layer 2 Status:
TEI = 85, Ces = 1, SAPI = 0, State = MULTIPLE_FRAME_ESTABLISHED
TEI = 86, Ces = 2, SAPI = 0, State = MULTIPLE_FRAME_ESTABLISHED
TEI 85, ces = 1, state = 8(established)
spid1 configured, spid1 sent, spid1 valid
TEI 86, ces = 2, state = 8(established)
spid2 configured, spid2 sent, spid2 valid
Layer 3 Status:
0 Active Layer 3 Call(s)
Activated dsl Bs = 0
The Free Channel Mask: 0x80000003
Total Allocated Bs = 2
Router1#
说明得是关注流量触发了拨号接通以后所有得数据都可以传输,不仅仅是关注流量
. 使用拨号接口
提问捆绑多个物理接口为一个拨号接口
回答
捆绑两个 ISDN BRI 接口
Router1#configure terminal
Enter mands, one per line. End TL/Z.
Router1(conf