Dell PowerConnect 8100 CLI Reference Guide - Page 1198
Graceful Restart, Commands in
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Graceful Restart The PowerConnect implementation of OSPFv2 supports graceful restart as specified in RFC 3623. Graceful restart works in concert with PowerConnect nonstop forwarding to enable the hardware to continue forwarding IPv4 packets using OSPFv2 routes while a backup unit takes over management unit responsibility. When OSPF executes a graceful restart, it informs its neighbors that the OSPF control plane is restarting, but that it will be back shortly. Helpful neighbors continue to advertise to the rest of the network that they have full adjacencies with the restarting router, avoiding announcement of a topology change and everything that goes with that (i.e., flooding of LSAs, SPF runs). Helpful neighbors continue to forward packets through the restarting router. The restarting router relearns the network topology from its helpful neighbors. PowerConnect implements both the restarting router and helpful neighbor features described in RFC 3623. Commands in this Chapter This chapter explains the following commands: area default-cost capability opaque ip ospf priority (Router OSPF) show ip ospf asbr area nssa (Router clear ip ospf OSPF) ip ospf retransmit- show ip ospf database interval area nssa defaultinfo-originate (Router OSPF Config) clear ip ospf stubrouter ip ospf transmitdelay show ip ospf database database-summary area nssa noredistribute compatible rfc1583 log adjacencychanges show ip ospf interface area nssa nosummary default-information max-metric routeroriginate (Router lsa OSPF Configuration) show ip ospf interface brief area nssa translator- default-metric role maximum-paths show ip ospf interface stats 1198 OSPF Commands
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