[j-nsp] SRX 550 BGP Flapping

[Emille Blanc]

You might want to check the MTU of the path, or ensure that pmtu is enabled.
It looks like you're using a redundant ethernet interface (reth). If you're using a non-standard MTU, make sure it is set correctly for its member interface(s).

________________________________________
From: juniper-nsp [juniper-nsp-bounces at puck.nether.net] On Behalf Of sameer mughal [pcs.sameer1 at gmail.com]
Sent: Monday, January 29, 2018 8:20 PM
To: juniper-nsp at puck.nether.net
Subject: Re: [j-nsp] SRX 550 BGP Flapping

I have seen hold time error. what will be the fix on this issue?

show bgp neighbor xx.xx.xx.xx
Peer: xx.xx.xx.xx+179 AS xxxx  Local: xx.xx.xx.xx+56228 AS xxxx
  Type: External    State: Established    Flags: <Sync>
  Last State: OpenConfirm   Last Event: RecvKeepAlive
  Last Error: Hold Timer Expired Error
  Export: [ IMPORT-LAN-INTO-BGP ] Import: [ Reject-BGP ]
  Options: <Preference LocalAddress AuthKey PeerAS Refresh>
  Options: <AdvertisePeerAs>
  Authentication key is configured
  Local Address: xx.xx.xx.xx Holdtime: 90 Preference: 170
  Number of flaps: 30
  Last flap event: HoldTime
  Error: 'Hold Timer Expired Error' Sent: 30 Recv: 0
  Peer ID: xx.xx.xx.xx Local ID: xx.xx.xx.xx       Active Holdtime: 90
  Keepalive Interval: 30         Group index: 0    Peer index: 0
  BFD: disabled, down
  Local Interface: reth2.0
  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)
  Stale routes from peer are kept for: 300
  Peer does not support Restarter functionality
  Peer does not support Receiver functionality
  Peer does not support LLGR Restarter or Receiver functionality
  Peer supports 4 byte AS extension (peer-as xx.xx.xx.xx)
  Peer does not support Addpath
  Table inet.0 Bit: 10000
    RIB State: BGP restart is complete

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On Tue, Jan 30, 2018 at 9:14 AM, sameer mughal <pcs.sameer1 at gmail.com>
wrote:

> Hi,
> Can anyone help me on this bgp flapping issue?
>
> show bgp summary
> Groups: 1 Peers: 1 Down peers: 0
> Table          Tot Paths  Act Paths Suppressed    History Damp State
> Pending
> inet.0
>                       37         31          0          0          0
>     0
> Peer                     AS      InPkt     OutPkt    OutQ   Flaps Last
> Up/Dwn State|#Active/Received/Accepted/Damped...
> xx.xx.xx.xx         9541         86         70       0      *30 *
>  28:28 31/37/36/0           0/0/0/0
>
> {primary:node0}
>
> Peer: xx.xx.xx.xx +179 AS 9541 Local: xx.xx.xx.xx +56228 AS 64520
>   Type: External    State: Established    Flags: <Sync>
>   Last State: OpenConfirm   Last Event: RecvKeepAlive
>   Last Error: Hold Timer Expired Error
>   Export: [ IMPORT-LAN-INTO-BGP ] Import: [ Reject-BGP ]
>   Options: <Preference LocalAddress AuthKey PeerAS Refresh>
>   Options: <AdvertisePeerAs>
>   Authentication key is configured
>   Local Address: 192.168.111.74 Holdtime: 90 Preference: 170
>   Number of flaps: 30
>   Last flap event: HoldTime
>   Error: 'Hold Timer Expired Error' Sent: 30 Recv: 0
>   Peer ID: xx.xx.xx.xx Local ID: xx.xx.xx.xx        Active Holdtime: 90
>   Keepalive Interval: 30         Group index: 0    Peer index: 0
>   BFD: disabled, down
>   Local Interface: reth2.0
>   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)
>   Stale routes from peer are kept for: 300
>   Peer does not support Restarter functionality
>   Peer does not support Receiver functionality
>   Peer does not support LLGR Restarter or Receiver functionality
>   Peer supports 4 byte AS extension (peer-as 9541)
>   Peer does not support Addpath
>   Table inet.0 Bit: 10000
>     RIB State: BGP restart is complete
>     Send state: in sync
>     Active prefixes:              31
>     Received prefixes:            37
>     Accepted prefixes:            36
>     Suppressed due to damping:    0
>     Advertised prefixes:          48
>   Last traffic (seconds): Received 28   Sent 10   Checked 58
>   Input messages:  Total 80     Updates 30      Refreshes 0     Octets 2749
>   Output messages: Total 64     Updates 5       Refreshes 0     Octets 1618
>   Output Queue[0]: 0            (inet.0, inet-unicast)
>
>
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