[AusNOG] Team Cymru BGP flap Q

[Dino Sosic]

Could this deliberate reset happen due to the large latency/RTT between the two speakers?

From: Mark Newton [mailto:newton at atdot.dotat.org]
Sent: Monday, 29 May 2017 12:08 PM
To: Dino Sosic <Dino.Sosic at datacom.com.au>
Cc: ausnog at lists.ausnog.net
Subject: Re: [AusNOG] Team Cymru BGP flap Q


Fiddling with timers won't change this: the message is "Peer closed the session" because "BGP Notification Received", so it's a deliberate reset that's coming from the other end, rather than a network failure.

  - mark

On 05/29/2017 12:26 PM, Dino Sosic wrote:
Yes of course. I’ve shoot them an email. But they are not known to be the fastest guys, especially since it’s a free service. This was more of “does or did anyone else from AU have issues regarding this?” ☺

Ta
Dino


From: Mark Newton [mailto:newton at atdot.dotat.org]
Sent: Monday, 29 May 2017 10:19 AM
To: Dino Sosic <Dino.Sosic at datacom.com.au><mailto:Dino.Sosic at datacom.com.au>
Cc: ausnog at lists.ausnog.net<mailto:ausnog at lists.ausnog.net>
Subject: Re: [AusNOG] Team Cymru BGP flap Q

Have you thought about asking your peer?

  - mark


On May 29, 2017, at 8:37 AM, Dino Sosic <Dino.Sosic at datacom.com.au<mailto:Dino.Sosic at datacom.com.au>> wrote:

Hi,

Would anyone have any ideas why this BGP is flapping two or so times a day?

1303812: May 28 2017 23:56:29 ACST: %BGP-5-NBR_RESET: Neighbor 38.229.66.20 reset (Peer closed the session)
1303813: May 28 2017 23:56:29 ACST: %BGP-5-ADJCHANGE: neighbor 38.229.66.20 vpn vrf internet Down Peer closed the session
1303814: May 28 2017 23:56:29 ACST: %BGP_SESSION-5-ADJCHANGE: neighbor 38.229.66.20 IPv4 Unicast vpn vrf internet topology base removed from session  Peer closed the session
1303815: May 28 2017 23:56:41 ACST: %BGP-5-ADJCHANGE: neighbor 38.229.66.20 vpn vrf internet Up
1303816: May 28 2017 23:58:26 ACST: %BGP-3-NOTIFICATION: received from neighbor 38.229.66.20 4/0 (hold time expired) 0 bytes
1303817: May 28 2017 23:58:26 ACST: %BGP-5-NBR_RESET: Neighbor 38.229.66.20 reset (BGP Notification received)
1303818: May 28 2017 23:58:26 ACST: %BGP-5-ADJCHANGE: neighbor 38.229.66.20 vpn vrf internet Down BGP Notification received
1303819: May 28 2017 23:58:26 ACST: %BGP_SESSION-5-ADJCHANGE: neighbor 38.229.66.20 IPv4 Unicast vpn vrf internet topology base removed from session  BGP Notification received
1303820: May 28 2017 23:58:39 ACST: %BGP-5-ADJCHANGE: neighbor 38.229.66.20 vpn vrf internet Up


Nothing fancy in the config, just usual template peer-session and peer-policy. Anyone else having this issue? Platform is ASR1k running 03.14.01.S (15.5.1 S1). Latency to the peer is around 300 ms in average, due to it being in US. I did try different timers but it didn’t resolve the issue, just slowed it down.

Cheers,

Dino



Confidentiality and Privilege Notice

This document is intended solely for the named addressee. The information contained in the pages is confidential and contains legally privileged information. If you are not the addressee indicated in this message or responsible for delivery of the message to such person, you may not copy or deliver this message to anyone, and you should destroy this message and kindly notify the sender by reply email. Confidentiality and legal privilege are not waived or lost by reason of mistaken delivery to you.

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.ausnog.net/pipermail/ausnog/attachments/20170529/f1dabade/attachment.html>