22. Holddown Timers (保持失效定时器)路由器在Hold-Down时间内将该条记录标记为possibly down以使其它路由器能够重新计算网络结构的变化Network 10.4.0.0 is down
then back up
then back downUpdate after
hold-down TimeNetwork 10.4.0.0
is unreachableABC10.1.0.010.2.0.010.3.0.010.4.0.0E0S0S0S1S0E0XUpdate after
hold-down Time
23. Triggered Updates(触发更新)当路由表发生变化时路由器立即发送更新信息ABC10.2.0.010.3.0.010.4.0.0E0S0S0S1S0E0XNetwork 10.4.0.0
is unreachableNetwork 10.4.0.0
is unreachableNetwork 10.4.0.0
is unreachable10.1.0.0
32. 查看RIP信息RouterA#sh ip protocols
Routing Protocol is "rip"
Sending updates every 30 seconds, next due in 0 seconds
Invalid after 180 seconds, hold down 180, flushed after 240
Outgoing update filter list for all interfaces is
Incoming update filter list for all interfaces is
Redistributing: rip
Default version control: send version 1, receive any version
Interface Send Recv Key-chain
Ethernet0 1 1 2
Serial2 1 1 2
Routing for Networks:
10.0.0.0
172.16.0.0
Routing Information Sources:
Gateway Distance Last Update
10.1.1.2 120 00:00:10
Distance: (default is 120)
172.16.1.1S2E0S3192.168.1.110.1.1.110.2.2.210.1.1.2S2S310.2.2.3172.16.1.0ABC192.168.1.0 E0
33. 查看路由表RouterA#sh ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, * - candidate default
U - per-user static route, o - ODR
T - traffic engineered route
Gateway of last resort is not set
172.16.0.0/24 is subnetted, 1 subnets
C 172.16.1.0 is directly connected, Ethernet0
10.0.0.0/24 is subnetted, 2 subnets
R 10.2.2.0 [120/1] via 10.1.1.2, 00:00:07, Serial2
C 10.1.1.0 is directly connected, Serial2
R 192.168.1.0/24 [120/2] via 10.1.1.2, 00:00:07, Serial2172.16.1.1S2E0S3192.168.1.110.1.1.110.2.2.210.1.1.2S2S310.2.2.3172.16.1.0ABC192.168.1.0 E0
36. Router(config)# router rip Starts the RIP routing process, version 1 by defaultRIPv2 配置命令Router(config-router)# version 2
Router(config-router)# no auto-summary Defines RIPv2 on the routerRouter(config-router)# network network-number 哪些接口参与路由
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