Dell FCX624-I Laptop User Manual


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964 PowerConnect B-Series FCX Configuration Guide
53-1002266-01
Clearing OSPF information
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Enabling and disabling OSPF graceful restart
OSPF graceful restart is enabled by default on a PowerConnect Layer 3 switch. To disable it, use
the following commands.
PowerConnect (config)# router ospf
PowerConnect (config-ospf-router)# no graceful-restart
To re-enable OSPF graceful restart after it has been disabled, enter the following commands.
PowerConnect (config)# router ospf
PowerConnect (config-ospf-router)# graceful-restart
Syntax: [no] graceful-restart
Configuring the OSPF graceful restart time
Use the following commands to specify the maximum amount of time advertised to a neighbor
router to maintain routes from and forward traffic to a restarting router.
PowerConnect (config) router ospf
PowerConnect (config-ospf-router)# graceful-restart restart-time 120
Syntax: [no] graceful-restart restart-time <seconds>
The <seconds> variable sets the maximum restart wait time advertised to neighbors.
Possible values are from 10 through 1800 seconds.
The default value is 120 seconds.
Disabling OSPF graceful restart helper mode
By default, a PowerConnect Layer 3 switch supports other restarting routers as a helper. You can
prevent your PowerConnect router from participating in OSPF graceful restart by using the
following commands.
PowerConnect (config) router ospf
PowerConnect (config-ospf-router)# graceful-restart helper-disable
Syntax: [no] graceful-restart helper-disable
This command disables OSPF graceful restart helper mode.
The default behavior is to help the restarting neighbors.
Clearing OSPF information
The following kinds of OSPF information can be cleared from a Dell OSPF link state database and
OSPF routing table:
Routes received from OSPF neighbors. You can clear routes from all OSPF neighbors, or an
individual OSPF neighbor, specified either by the neighbor IP address or its router ID
OSPF topology information, including all routes in the OSPF routing table
All routes in the OSPF routing table that were redistributed from other protocols