[dev] IPv6 Multihop BGP & Vendor specific capability 131

[Donald Sharp]

David -

Can you capture a pcap of the session?  This would help us
tremendously in tracking down where the issue is.

thanks!

donald

On Wed, Sep 27, 2017 at 5:25 AM, David Hooton <david.hooton at ordnance.co> wrote:
> Hi All,
>
>
>
> I’m running 3.0-rc2 and appear to have found a bug in the IPv6 multihop BGP
> code.
>
>
>
> The box is configured to peer with a 3rd party ASR9000 and can’t seem to
> keep the session up. It will download ~30,000 routes then reset the session
> with the following errors in the logs.
>
>
>
> Sep 27 19:19:45 ord-285eec43a74305dd bgpd[16943]: bgp_mp_reach_parse:
> (2001:XX00:100::30:XXX) Failed to read NLRI
>
> Sep 27 19:19:45 ord-285eec43a74305dd bgpd[16943]: %NOTIFICATION: sent to
> neighbor 2001:XX00:100::30:XXX 3/1 (UPDATE Message Error/Malformed Attribute
> List) 0 bytes
>
> Sep 27 19:19:45 ord-285eec43a74305dd bgpd[16943]: 2001:XX00:100::30:XXX:
> Attribute MP_REACH_NLRI, parse error
>
> Sep 27 19:19:45 ord-285eec43a74305dd bgpd[16943]: %ADJCHANGE: neighbor
> 2001:XX00:100::30:XXX(Unknown) in vrf Default Down BGP Notification send
>
> Sep 27 19:19:47 ord-285eec43a74305dd bgpd[16943]: 2001:XX00:100::30:XXX
> Vendor specific capability 131
>
> Sep 27 19:19:47 ord-285eec43a74305dd bgpd[16943]: %ADJCHANGE: neighbor
> 2001:XX00:100::30:XXX(Unknown) in vrf Default Up
>
> Sep 27 19:19:49 ord-285eec43a74305dd bgpd[16943]: bgp_mp_reach_parse:
> (2001:XX00:100::30:XXX) Failed to read NLRI
>
> Sep 27 19:19:49 ord-285eec43a74305dd bgpd[16943]: %NOTIFICATION: sent to
> neighbor 2001:XX00:100::30:XXX 3/1 (UPDATE Message Error/Malformed Attribute
> List) 0 bytes
>
> Sep 27 19:19:49 ord-285eec43a74305dd bgpd[16943]: 2001:XX00:100::30:XXX:
> Attribute MP_REACH_NLRI, parse error
>
> Sep 27 19:19:49 ord-285eec43a74305dd bgpd[16943]: %ADJCHANGE: neighbor
> 2001:XX00:100::30:XXX(Unknown) in vrf Default Down BGP Notification send
>
>
>
> A single hop BGP session seems to work fine, it is just the multihop
> sessions which won’t stay up. Any suggestions?
>
>
>
> Kind Regards,
>
> David Hooton
> Founder | Ordnance
>
> Cloud Scale, Carrier Grade
> P: +61415850000 T: @dave_hooton W: ordnance.co
>
>
>
>
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