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Verifying Graceful Restart Operation

This topic contains the following sections:

Graceful Restart Operational Mode Commands

To verify proper operation of graceful restart, use the following commands:

show bgp neighbor (for BGP graceful restart)
show log (for IS-IS and OSPF/OSPFv3 graceful restart)
show (ospf | ospfv3) overview (for OSPF/OSPFv3 graceful restart)

For more information about these commands and a description of their output fields, see the CLI Explorer.

Verifying BGP Graceful Restart

To view graceful restart information for BGP sessions, use the show bgp neighbor command:

user@PE1> show bgp neighbor 192.255.10.1

Peer: 192.255.10.1+179 AS 64595 Local: 192.255.5.1+1106 AS 64595
  Type: Internal    State: Established    Flags: <>
  Last State: OpenConfirm   Last Event: RecvKeepAlive
  Last Error: None
  Export: [ static ] 
  Options:<Preference LocalAddress HoldTime GracefulRestart Damping PeerAS Refresh>
  Local Address: 192.255.5.1 Holdtime: 90 Preference: 170
  IPSec SA Name: hope
  Number of flaps: 0
  Peer ID: 192.255.10.1     Local ID: 192.255.5.1      Active Holdtime: 90
  Keepalive Interval: 30
  NLRI for restart configured on peer: inet-unicast
  NLRI advertised by peer: inet-unicast
  NLRI for this session: inet-unicast
  Peer supports Refresh capability (2)
  Restart time configured on the peer: 180
  Stale routes from peer are kept for: 180
  Restart time requested by this peer: 300
  NLRI that peer supports restart for: inet-unicast
  NLRI that peer saved forwarding for: inet-unicast
  NLRI that restart is negotiated for: inet-unicast
  NLRI of received end-of-rib markers: inet-unicast
  NLRI of all end-of-rib markers sent: inet-unicast
  Table inet.0 Bit: 10000
    RIB State: restart is complete
    Send state: in sync
    Active prefixes: 0
    Received prefixes: 0
    Suppressed due to damping: 0
  Last traffic (seconds): Received 19   Sent 19   Checked 19
  Input messages:  Total 2      Updates 1       Refreshes 0     Octets 42
  Output messages: Total 3      Updates 0       Refreshes 0     Octets 116
  Output Queue[0]: 0

Verifying IS-IS and OSPF Graceful Restart

To view graceful restart information for IS-IS and OSPF, configure traceoptions (see Tracking Graceful Restart Events).

Here is the output of a traceoptions log from an OSPF restarting router:

Oct  8 05:20:12 Restart mode - sending grace lsas
Oct  8 05:20:12 Restart mode - estimated restart duration timer triggered
Oct  8 05:20:13 Restart mode - Sending more grace lsas

Here is the output of a traceoptions log from an OSPF helper router:

Oct  8 05:20:14 Helper mode for neighbor 192.255.5.1
Oct  8 05:20:14  Received multiple grace lsa from 192.255.5.1