OSPF GR配置

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OSPF GR配置举例：

路由器R1、R2和R3都为双主控设备，主用板和备用板间形成备份关系。路由器间通过OSPF协议实现网络互连，并提供GR机制。
要求当R1通过GR方式重启OSPF进程或者进行主备倒换时转发不中断。

1、各设备配置接口地址及部署OSPF。（略）

2、在R1、R2和R3上使能OSPF GR功能。

[R1] ospf 1
[R1-ospf-1] opaque-capability enable
[R1-ospf-1] graceful-restart

[R3] ospf 1
[R3-ospf-1] opaque-capability enable
[R3-ospf-1] graceful-restart

[R3] ospf 1
[R3-ospf-1] opaque-capability enable
[R3-ospf-1] graceful-restart

3、查看路由器上OSPF GR的状态（以R1的显示为例）：

<R1> display ospf 1 graceful-restart 

	 OSPF Process 1 with Router ID 10.1.13.1
 Graceful-restart capability     : enabled
 Graceful-restart support        : planned and un-planned, totally
 Helper-policy support  : planned and un-planned, strict lsa check
 Current GR state                   : normal
 Graceful-restart period          : 120 seconds

 Number of neighbors under helper:
  Normal neighbors     : 0
  Virtual neighbors      : 0
  Sham-link neighbors : 0
  Total neighbors        : 0

 Number of restarting neighbors : 0

 Last exit reason:
  On graceful restart : none
  On Helper              : none

4、在R1用户视图下执行reset ospf process graceful-restart重启OSPF进程1，同时在R2上执行display ospf peer查看与R1的OSPF邻接关系：

<R1> reset ospf 1 process graceful-restart

<R2> display ospf 1 peer 

	 OSPF Process 1 with Router ID 10.1.12.2
		 Neighbors 

 Area 0.0.0.1 interface 10.1.12.2(GigabitEthernet0/0/0)'s neighbors
 Router ID: 10.1.13.1    Address: 10.1.12.1       GR State: Doing GR   
   State: Full                Mode: Nbr is  Master  Priority: 1
   DR: 10.1.12.1            BDR: 10.1.12.2            MTU: 0    
   Dead timer due in 32  sec 
   Retrans timer interval: 5 
   Neighbor is up for 00:00:13     
   Authentication Sequence: [ 0 ]

R2上OSPF邻居状态为Full，表示R1以GR方式重启OSPF进程时，R2上邻居关系不中断。

5、查看路由器上OSPF GR的状态：R1正常退出GR，R2正常退出Helper。

<R1> display ospf 1 graceful-restart

	 OSPF Process 1 with Router ID 10.1.13.1
 Graceful-restart capability     : enabled
 Graceful-restart support        : planned and un-planned, totally
 Helper-policy support            : planned and un-planned, strict lsa check
 Current GR state                   : normal
 Graceful-restart period          : 120 seconds

 Number of neighbors under helper:
  Normal neighbors     : 0
  Virtual neighbors      : 0
  Sham-link neighbors : 0
  Total neighbors        : 0

 Number of restarting neighbors : 0

 Last exit reason:
  On graceful restart : successful exit
  On Helper             : none

<R2> display ospf 1 graceful-restart 

	 OSPF Process 1 with Router ID 10.1.12.2
 Graceful-restart capability     : enabled
 Graceful-restart support        : planned and un-planned, totally
 Helper-policy support            : planned and un-planned, strict lsa check
 Current GR state                   : normal
 Graceful-restart period          : 120 seconds

 Number of neighbors under helper:
  Normal neighbors      : 0
  Virtual neighbors       : 0
  Sham-link neighbors  : 0
  Total neighbors         : 0

 Number of restarting neighbors : 0

 Last exit reason:
  On graceful restart : none
  On Helper              : successful exit

关于 OSPF GR配置文章到此结束，感谢您的耐心观看，如果有不明白OSPF配置的或者想学习更多计算机网络知识的，可以访问本站-计算机网络-这个栏目查看更多内容。

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