User's Manual

43-3
Usage Guide:
If grace period set by GR restarter is bigger than max-grace period configured by helper, helper will
not help restarter to complete GR. The no command deletes all helper policies.
Example:
Configure the maximum grace period allowed by GR helper to 100s.
Switch(config)#ospf graceful-restart helper max-grace-period 100
43.5 ospf graceful-restart helper never
Command:
ospf graceful-restart helper never
no ospf graceful-restart helper
Function:
One of GR helper policies. Configured the switch can not work as OSPF GR helper. The no
command deletes all configured helper policies.
Command mode:
Global configuration mode
Default:
Switch can work as GR helper.
Usage Guide:
After configure the policy, switch can only work as GR restarter (a switch processes switchover and
restart protocol), not GR helper (a switch helps restarter to complete GR).
Example:
Configure that switch cannot work as OSPF helper.
Switch(config)#ospf graceful-restart helper never
43.6 show ip ospf
Command:
show ip ospf [<process-id>]
Function:
Show main information of OSPF, including whether it supports GR and it can works as GR helper,
the configured grace period and so on.
Parameter:
<process-id>: Process ID, ranging from 0 to 65535. It means that show main OSPF information of