ISIS路由泄漏及负载均衡.docx

实验需求，完成ISIS 负载均衡 （R1访问R4有两条路径）需求：level-1 R1 Level-1-2 R2 R3 Level-2 R4ISIS AREA 1 :49.0001ISIS AREA 2:49.0002R1 作为level-1能够收到默认路由的条件：1. R1 是level12. R2 R3必须是level-1-2,且必须连接到多区域正常情况下，L2路由器中会含有整个自治系统的所有路由包含L1L1需要通过路由泄漏有需求的选择L2路由。此实现选择的网络环境为Broadcast，需要选举DIS。DIS选举规则，优先级高,MAC地址大。配置如下; R1 Int fa0/0 Ip add 12.1.1.1 255.255.255.0 No shut Int fa0/1Ip add 13.1.1.1 255.255.255.0No shutInt loop 0Ip add 1.1.1.1 255.255.255.0No shutExitRouter isisNet 49.0001.1111.1111.1111.00Log-adjest-changes allIs-type level-1ExitInt fa0/1Ip router isisInt fa0/0Ip router isisInt loop 0Ip router isisR2 Int fa0/0Ip add 12.1.1.2 255.255.255.0No shutInt fa0/1Ip add 24.1.1.2 255.255.255.0No shutInt loop 0Ip add 2.2.2.2 255.255.255.0No shutExitRouter isisNet 49.0001.2222.2222.2222.00Log-adjest-changes allIs-type level-1-2ExitInt fa0/0Ip router isisInt fa0/1Ip router isisInt loop 0Ip router isisExitShow clns is-neighborShow clns neighborClear isis *Clear clns neighborShow isis hostnameShow isis databaseShow isis database verboseR3Int fa0/0Ip add 13.1.1.3 255.255.255.0No shutInt fa0/1Ip add 34.1.1.3 255.255.255.0No shutInt loop 0Ip add 3.3.3.3 255.255.255.0No shutExitRouter isisNet 49.0001.3333.3333.3333.00Log-adjest-changes allIs-type level-1-2ExitInt fa0/0Ip router isisInt fa0/1Ip router isisInt loop 0Ip router isisExitR4Int fa0/0Ip add 34.1.1.4 255.255.255.0No shutInt fa0/1Ip add 24.1.1.4 255.255.255.0No shutInt loop 0Ip add 4.4.4.4 255.255.255.0No shutInt loop 1Ip add 5.5.5.5 255.255.255.0No shutExitRouter isisNet 49.0002.4444.4444.4444.00Log-adjest-changes allIs-type level-2-onlyExitInt fa0/0Ip router isisInt fa0/1Ip router isisInt loop 0Ip router isisExitShow clns is-neighbor 查看DIS。在R1 中使用show ip route 可查看到两条默认路由。这样即可实现R1-R4的负载均衡。如果此时，需求，R1访问R4的5.5.5.5 网段，只能走下路。访问其他R4网段走上路。R1: int fa0/0 Isis metric 5 (默认为10) 修改度量值后，默认路由会优先选择去往12.1.1.2 R3: router isis Redistribute isis ip level-2 into level-1 dis-list 100 Exit Access-li