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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)
    • show rsvp neighbor detail (for RSVP graceful restart—helper router)
    • show rsvp version (for RSVP graceful restart—restarting router)
    • show ldp session detail (for LDP graceful restart)
    • show connections (for CCC and TCC graceful restart)
    • show route instance detail (for Layer 3 VPN graceful restart and for any protocols using graceful restart in a routing instance)
    • show route protocol l2vpn (for Layer 2 VPN 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 192.0.2.10
    Peer: 192.0.2.10+179 AS 64496 Local: 192.0.2.5+1106 AS 64496
      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: 192.0.2.5 Holdtime: 90 Preference: 170
      IPSec SA Name: hope
      Number of flaps: 0
      Peer ID: 192.0.2.10     Local ID: 192.0.2.5      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 192.0.2.5
    Oct  8 05:20:14  Received multiple grace lsa from 192.0.2.5
    

    Verifying CCC and TCC Graceful Restart

    To view graceful restart information for CCC and TCC connections, use the show connections command. The following example assumes four remote interface CCC connections between CE1 and CE2:

    user@PE1> show connections
    CCC and TCC connections [Link Monitoring On]
      Legend for status (St)              Legend for connection types
      UN -- uninitialized                 if-sw:  interface switching
      NP -- not present                   rmt-if: remote interface switching
      WE -- wrong encapsulation           lsp-sw: LSP switching
      DS -- disabled
      Dn -- down                          Legend for circuit types
      -> -- only outbound conn is up      intf -- interface
      <- -- only inbound  conn is up      tlsp -- transmit LSP
      Up -- operational                   rlsp -- receive LSP
      RmtDn -- remote CCC down
      Restart -- restarting
    
    CCC Graceful restart : Restarting
    
    Connection/Circuit                Type    St      Time last up     # Up trans
    CE1-CE2-0                         rmt-if  Restart -----                     0
      fe-1/1/0.0                        intf  Up
      PE1-PE2-0                         tlsp  Up
      PE2-PE1-0                         rlsp  Up
    CE1-CE2-1                         rmt-if  Restart -----                     0
      fe-1/1/0.1                        intf  Up
      PE1-PE2-1                         tlsp  Up
      PE2-PE1-1                         rlsp  Up
    CE1-CE2-2                         rmt-if  Restart -----                     0
      fe-1/1/0.2                        intf  Up
      PE1-PE2-2                         tlsp  Up
      PE2-PE1-2                         rlsp  Up
    CE1-CE2-3                         rmt-if  Restart -----                     0
      fe-1/1/0.3                        intf  Up
      PE1-PE2-3                         tlsp  Up
      PE2-PE1-3                         rlsp  Up
    

    Modified: 2016-06-20