VRRP接口追踪和抢占

Myth丶恋晨 2022-01-15 13:59 372阅读 0赞

拓扑图

[![174227225.png][]][174227225.png]

实验过程

1.pc1和pc2的配置

<table style="border-bottom:medium none;border-left:medium none;border-collapse:collapse;border-top:medium none;border-right:medium none;"> 
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 <td style="border-bottom:1pt solid;border-left:1pt solid;width:426.1pt;border-top:1pt solid;border-right:1pt solid;"> Router&gt;en Router#config t Enter configuration commands, one per line.&nbsp; End with CNTL/Z. Router(config)#no ip domain-lookup Router(config)#line con 0 Router(config-line)#no exec-timeout Router(config-line)#loggin syn Router(config-line)#exit Router(config)#host&nbsp; pc1 pc1(config)#int e0/0 pc1(config-if)#no shut pc1(config-if)#ip add 192.168.1.1 255.255.255.0 pc1(config-if)#exit pc1(config)#ip default-gateway 192.168.1.254&nbsp; //网关指向虚拟IP Router&gt;en Router#config t Enter configuration commands, one per line.&nbsp; End with CNTL/Z. Router(config)#no ip domain-lookup Router(config)#line con 0 Router(config-line)#no exec-timeout Router(config-line)#loggin syn Router(config-line)#exit Router(config)#host&nbsp; pc2 pc2(config)#int e0/0 pc2(config-if)#no shut pc2(config-if)#ip add 192.168.2.2 255.255.255.0 pc2(config-if)#exit pc2(config)#ip default-gateway 192.168.2.254 pc2(config)#end </td> 
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2.R2的配置

<table style="border-bottom:medium none;border-left:medium none;border-collapse:collapse;border-top:medium none;border-right:medium none;"> 
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 <td style="border-bottom:1pt solid;border-left:1pt solid;width:426.1pt;border-top:1pt solid;border-right:1pt solid;"> Router&gt;en Router#config t Enter configuration commands, one per line.&nbsp; End with CNTL/Z. Router(config)#no ip domain-lookup Router(config)#line con 0 Router(config-line)#no exec-timeout Router(config-line)#loggin syn Router(config-line)#exit Router(config)#host&nbsp; R2 R2(config)#int e0/0 R2(config-if)#no shut R2(config-if)#ip add 192.168.1.2 255.255.255.0 R2(config-if)#int e0/1 R2(config-if)#no shut R2(config-if)#ip add 192.168.2.3 255.255.255.0 R2(config-if)#exit R2(config)#int e0/0&nbsp;&nbsp; R2(config-if)#vrrp 10 ip 192.168.1.254&nbsp; //创建vrrp组10 R2(config-if)#vrrp 10 priority 150&nbsp; //修改优先级 R2(config-if)#vrrp 10 preempt&nbsp; //启用抢占功能 R2(config-if)#int e0/1 R2(config-if)#vrrp 20 ip 192.168.2.254 R2(config-if)# &nbsp; </td> 
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3.R3的配置

<table style="border-bottom:medium none;border-left:medium none;border-collapse:collapse;border-top:medium none;border-right:medium none;"> 
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 <td style="border-bottom:1pt solid;border-left:1pt solid;width:426.1pt;border-top:1pt solid;border-right:1pt solid;"> Router&gt;en Router#config t Enter configuration commands, one per line.&nbsp; End with CNTL/Z. Router(config)#no ip domain-lookup Router(config)#line con 0 Router(config-line)#no exec-timeout Router(config-line)#loggin syn Router(config-line)#exit Router(config)#host&nbsp; R3 R3(config)#int e0/0 R3(config-if)#no shut R3(config-if)#ip add 192.168.1.3 255.255.255.0 R3(config-if)#int e0/1 R3(config-if)#no shut R3(config-if)#ip add 192.168.2.4 255.255.255.0 R3(config-if)#exit R3(config-if)#exit R3(config)#int e0/0 R3(config-if)#vrrp 10 ip 192.168.1.254 R3(config-if)#int e0/1 R3(config-if)#vrrp 20 ip 192.168.2.254 R3(config-if)#vrrp 20 priority 150 R3(config-if)#vrrp 20 preempt R3(config-if)#exit </td> 
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4.查看R2的vrrp信息

5.查看R3的vrrp信息

6.在R2上配置VRRP抢占

7.在R3上配置VRRP抢占

8.模拟故障，关闭R1的e0/1接口

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 <td style="border-bottom:1pt solid;border-left:1pt solid;width:426.1pt;border-top:1pt solid;border-right:1pt solid;"> R2(config)#int e0/1 R2(config-if)#shut R2(config-if)#end R2#show vrrp br Interface&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Grp Pri Time&nbsp; Own Pre State&nbsp;&nbsp; Master addr&nbsp;&nbsp;&nbsp;&nbsp; Group addr Et0/0&nbsp;&nbsp;&nbsp; 10&nbsp; 80&nbsp; 3414&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Y&nbsp; Backup&nbsp; 192.168.1.3&nbsp;&nbsp;&nbsp;&nbsp; 192.168.1.254&nbsp; Et0/1&nbsp; &nbsp;&nbsp;20&nbsp; 100 3609&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Y&nbsp; Init&nbsp;&nbsp;&nbsp; 192.168.2.4&nbsp;&nbsp;&nbsp;&nbsp; 192.168.2.254 R3#show vrrp br Interface&nbsp;&nbsp;&nbsp;&nbsp; Grp Pri Time&nbsp; Own Pre State&nbsp;&nbsp; Master addr&nbsp;&nbsp;&nbsp;&nbsp; Group addr Et0/0&nbsp;&nbsp;&nbsp; 10&nbsp; 100 3609&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Y&nbsp; Master&nbsp; 192.168.1.3&nbsp;&nbsp;&nbsp;&nbsp; 192.168.1.254&nbsp; Et0/1&nbsp;&nbsp; &nbsp;20&nbsp; 150 3414&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Y &nbsp;Master&nbsp; 192.168.2.4&nbsp;&nbsp;&nbsp;&nbsp; 192.168.2.254 说明：当e0/1down掉以后，自动切换到了R3，现在pc1到pc2走R3，并且R2 vrrp的优先级自动减少了70. </td> 
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8.打开R2的e0/1接口

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 <td style="border-bottom:1pt solid;border-left:1pt solid;width:426.1pt;border-top:1pt solid;border-right:1pt solid;"> R2(config)#int e0/1 R2(config-if)#no shut R2(config-if)#end R2#show vrrp br Interface&nbsp;&nbsp;&nbsp;&nbsp; Grp Pri Time&nbsp; Own Pre State&nbsp;&nbsp; Master addr&nbsp;&nbsp;&nbsp;&nbsp; Group addr Et0/0&nbsp;&nbsp;&nbsp;&nbsp; 10&nbsp; 150 3414&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Y&nbsp; Master&nbsp; 192.168.1.2&nbsp;&nbsp;&nbsp;&nbsp; 192.168.1.254&nbsp; Et0/1&nbsp;&nbsp; &nbsp;20&nbsp; 100 3609&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Y&nbsp; Backup&nbsp; 192.168.2.4&nbsp;&nbsp;&nbsp;&nbsp; 192.168.2.254 R3#show vrrp br Interface&nbsp;&nbsp;&nbsp;&nbsp; Grp Pri Time&nbsp; Own Pre State&nbsp;&nbsp; Master addr&nbsp;&nbsp;&nbsp;&nbsp; Group addr Et0/0&nbsp;&nbsp;&nbsp; 10&nbsp; 100 3609&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Y&nbsp; Init&nbsp;&nbsp;&nbsp; 0.0.0.0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 192.168.1.254&nbsp; Et0/1&nbsp; &nbsp;20&nbsp; 80&nbsp; 3414&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Y&nbsp; Backup&nbsp; 192.168.2.3&nbsp;&nbsp;&nbsp;&nbsp; 192.168.2.254 说明：当R2的接口恢复正常以后，pc1到pc2的线路自动切回了R2，这是因为R2上面启用了抢占功能。 </td> 
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转载于:https://blog.51cto.com/mxn19871215/483601

[174227225.png]: https://s1.51cto.com/attachment/201101/174227225.png