NETGEAR OSPF Graceful Restart Commands

Routing Commands
304
ProSafe M4100 and M7100 Managed Switches
show ip ospf virtual-link brief
This command displays the OSPF Virtual Interface information for all areas in the system.
Format show ip ospf virtual-link brief
Modes • Privileged EXEC
• User EXEC
Area ID
Neighbor
Hello Interval
Dead Interval
Retransmit
Interval
Transit Delay
OSPF Graceful Restart Commands
The OSPF protocol can be configured to participate in the checkpointing service, so that
these protocols can execute a graceful restart when the management unit fails. In a graceful
restart, the hardware to continues forwarding IPv4 packets using OSPF routes, while a
backup switch takes over management unit responsibility.
Graceful restart uses the concept of “helpful neighbors.” A fully adjacent router enters helper
mode when it receives a link state announcement (LSA) from the restarting management unit
indicating its intention of performing a graceful restart. In helper mode, a switch continues to
advertise to the rest of the network that they have full adjacencies with the restarting router,
Hello Interval The configured hello interval for the OSPF virtual interface.
Dead Interval The configured dead interval for the OSPF virtual interface.
Iftransit Delay
Interval The configured transit delay for the OSPF virtual interface.
Retransmit
Interval The configured retransmit interval for the OSPF virtual interface.
Authentication
Type The configured authentication type of the OSPF virtual interface.
State The OSPF Interface States are: down, loopback, waiting, point-to-point, designated
router, and backup designated router. This is the state of the OSPF interface.
Neighbor State The neighbor state.
Term Definition
The area id of the requested OSPF area.
The neighbor interface of the OSPF virtual interface.
The configured hello interval for the OSPF virtual interface.
The configured dead interval for the OSPF virtual interface.
The configured retransmit interval for the OSPF virtual interface.
The configured transit delay for the OSPF virtual interface.
Term Definition