一、實驗

拓撲

?

路由器R1和R2都為雙主控設備，主用板和備用板間形成備份關系。路由器間通過IS-IS協議實現網絡互連，并提供GR機制。

要求當R1通過GR方式重啟IS-IS進程或者進行主備倒換時轉發不中斷。

?1、基礎配置

AR1
system
sysname AR1
int g 0/0/0
ip add 10.0.12.1 24AR2
system
sysname AR2
int g 0/0/0
ip add 10.0.12.2 24

2、路由配置

AR1
isis 1
netw 49.0001.0000.0001.00
int g 0/0/0
isis enableAR2
isis 1
netw 49.0001.0000.0002.00
int g 0/0/0
isis enable

查看ISIS鄰居狀態

3、GR配置

AR1
isis 1
graceful-restart
graceful-restart no-impact-holdtimeAR2
isis 1
graceful-restart
graceful-restart no-impact-holdtime

查看ISIS GR狀態信息

[AR1]display isis 1 graceful-restart  status Restart information for ISIS(1)-------------------------------IS-IS(1) Level-1 Restart Status
Restart Interval: 300 
SA Bit Supported Total Number of Interfaces = 1Restart Status: RESTART COMPLETE IS-IS(1) Level-2 Restart Status
Restart Interval: 300 
SA Bit Supported Total Number of Interfaces = 1Restart Status: RESTART COMPLETE 

[AR2]display isis 1 graceful-restart status Restart information for ISIS(1)-------------------------------IS-IS(1) Level-1 Restart Status
Restart Interval: 300 
SA Bit Supported Total Number of Interfaces = 1Restart Status: RESTART COMPLETE IS-IS(1) Level-2 Restart Status
Restart Interval: 300 
SA Bit Supported Total Number of Interfaces = 1Restart Status: RESTART COMPLETE 

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