Netgear M4100-26G CLI Manual - Page 304
OSPF Graceful Restart Commands
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ProSafe M4100 and M7100 Managed Switches Term Definition 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 The configured authentication type of the OSPF virtual interface. Type 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. show ip ospf virtual-link brief This command displays the OSPF Virtual Interface information for all areas in the system. Format Modes show ip ospf virtual-link brief • Privileged EXEC • User EXEC Term Area ID Neighbor Hello Interval Dead Interval Retransmit Interval Transit Delay 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. 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, Routing Commands 304