Display Information About Graceful Restart; Warm Standby And Nonstop Routing For Ospf Version 2 - Cisco NCS 5500 Series Configuration Manuals

Implementing OSPF
Displays the state of the graceful restart link.

Display Information About Graceful Restart

This section describes the tasks you can use to display information about a graceful restart.
• To see if the feature is enabled and when the last graceful restart ran, use the show ospf command. To
Displaying the State of the Graceful Restart Feature
The following screen output shows the state of the graceful restart capability on the local router:
RP/0/RP0/CPU0:router#
Routing Process "ospfv3 1" with ID 2.2.2.2
Initial SPF schedule delay 5000 msecs
Minimum hold time between two consecutive SPFs 10000 msecs
Maximum wait time between two consecutive SPFs 10000 msecs
Initial LSA throttle delay 0 msecs
Minimum hold time for LSA throttle 5000 msecs
Maximum wait time for LSA throttle 5000 msecs
Minimum LSA arrival 1000 msecs
LSA group pacing timer 240 secs
Interface flood pacing timer 33 msecs
Retransmission pacing timer 66 msecs
Maximum number of configured interfaces 255
Number of external LSA 0. Checksum Sum 00000000
Number of areas in this router is 1. 1 normal 0 stub 0 nssa
Graceful Restart enabled, last GR 11:12:26 ago (took 6 secs)

Warm Standby and Nonstop Routing for OSPF Version 2

OSPFv2 warm standby provides high availability across RP switchovers. With warm standby extensions,
each process running on the active RP has a corresponding standby process started on the standby RP. A
standby OSPF process can send and receive OSPF packets with no performance impact to the active OSPF
process.
Nonstop routing (NSR) allows an RP failover, process restart, or in-service upgrade to be invisible to peer
routers and ensures that there is minimal performance or processing impact. Routing protocol interactions
between routers are not impacted by NSR. NSR is built on the warm standby extensions. NSR alleviates the
requirement for Cisco NSF and IETF graceful restart protocol extensions.
see details for an OSPFv3 instance, use the show ospfv3 process-name [ area-id ] database grace
command.
show ospfv3 1 database grace
Area BACKBONE(0)
Number of interfaces in this area is 1
SPF algorithm executed 1 times
Number of LSA 6. Checksum Sum 0x0268a7
Number of DCbitless LSA 0
Number of indication LSA 0
Number of DoNotAge LSA 0
Flood list length 0
Routing Configuration Guide for Cisco NCS 5500 Series Routers, IOS XR Release 6.3.x
Display Information About Graceful Restart
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