set protocols ospf graceful-restart helper strict-lsa-checking

Run the command set protocols ospf graceful-restart helper strict-lsa-checking to configure strict LSA checking on the Helper Router. Optional parameter vrf can be used to specify a VRF, if no VRF is specified the command takes effect on the default VRF. Strict LSA checking is enabled by default.

Optional parameter instance-id can be included to specify the OSPFv2 multi-instance ID in the default VRF.

Multiple instances of OSPF are only allowed in the default VRF. A maximum of 8 instance can be configured in the default VRF. In non-default VRFs, only single instance OSPF can be configured.

The command delete protocols ospf graceful-restart helper strict-lsa-checking can be used to remove this configuration.

Command Syntax

set protocols ospf [instance-id <instance-id>] [vrf<vrf-name>] graceful-restart helper strict-lsa-checking enable <true | false>

delete protocols ospf [instance-id <instance-id>] [vrf <vrf-name>] graceful-restart helper strict-lsa-checking enable <true | false>

Parameter

Parameter	Description
instance-id <instance-id>	Optional, specifies the OSPF instance ID. The value is an integer that ranges from 1 to 8.
vrf <vrf-name>	Optional. Specifies the name of the VRF for the OSPF instance.
true	Enables strict LSA checking.
false	Disables strict LSA checking.

Usage Guidelines

The strict LSA checking feature allows a helper router to terminate the graceful restart process if it detects a changed LSA that would cause flooding during the graceful restart process. You can enable strict LSA checking on an OSPF helper to have the router terminate graceful restart when there is a change to an LSA that would be flooded to the restarting router. This feature takes effect only when the router is in helper mode.

Example

Enable strict LSA checking on the Helper Router.

admin@PICOS# set protocols ospf instance-id 1 graceful-restart helper strict-lsa-checking enable true
admin@PICOS# commit