1100 OSPF Commands
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
(Router OSPF)
bandwidth ip ospf network show ip ospf area
area nssa (Router
OSPF)
capability opaque ip ospf priority show ip ospf asbr
area nssa default-
info-originate
clear ip ospf ip ospf retransmit-
interval
show ip ospf database
area nssa no-
redistribute
compatible rfc1583 ip ospf transmit-
delay
show ip ospf database
database-summary
area nssa no-
summary
default-
information
originate
maximum-paths show ip ospf interface
area nssa
translator-role
default-metric network area show ip ospf interface
brief
area nssa
translator-stab-intv
distance ospf nsf show ip ospf interface
stats
2CSPC4.XCT-SWUM2XX1.book Page 1100 Monday, October 3, 2011 11:05 AM