Hi Paolo,

Thanks for the suggestion. I am using bird which has separate daemons for v4 and v6, so I don't think there is any way to combine the sessions.


I could resolve this by changing the router IDs to be different between v4 and v6, but I'd hoped this would not be necessary and I could match on the peer IP address instead.

Charlie


On 02/01/17 00:21, Paolo Lucente wrote:
Hi Charlie,

I see about the same BGP router-id; i then wonder: why don't you just
travel both v4 and v6 address families inside the very same v4 (or v6)
session? Why the need for two sessions?

Cheers,
Paolo

On Sat, Dec 31, 2016 at 05:18:18PM +0000, Charlie Smurthwaite wrote:
Thank you very much Paolo!

The parser now accepts this configuration, but it still doesn't
quite work. Here is  my bgp_agent_map now:

bgp_ip=127.0.0.1   ip=0.0.0.0/0 filter='ip  or (vlan and ip)'
bgp_ip=::1         ip=0.0.0.0/0 filter='ip6 or (vlan and ip6)'

It seems that while ::1 is now accepted, it doesn't actually match
the peer. Here is the BGP log output:

INFO ( default/core/BGP ): maximum BGP peers allowed: 2
INFO ( default/core/BGP ): waiting for BGP data on :::17917
INFO ( default/core/BGP ): [127.0.0.1] BGP peers usage: 1/2
INFO ( default/core/BGP ): [185.5.34.12] Capability: MultiProtocol
[1] AFI [1] SAFI [1]
INFO ( default/core/BGP ): [185.5.34.12] Capability: 4-bytes AS [41]
ASN [65535]
INFO ( default/core/BGP ): [185.5.34.12] BGP_OPEN: Local AS: 65535
Remote AS: 65535 HoldTime: 240
INFO ( default/core/BGP ): [::1] BGP peers usage: 2/2
INFO ( default/core/BGP ): [185.5.34.12] Capability: MultiProtocol
[1] AFI [2] SAFI [1]
INFO ( default/core/BGP ): [185.5.34.12] Capability: 4-bytes AS [41]
ASN [65535]
INFO ( default/core/BGP ): [185.5.34.12] BGP_OPEN: Local AS: 65535
Remote AS: 65535 HoldTime: 240

If i bring up only the IPv6 peering, the following (using the router
ID) works and resolves only IPv6 ASNs. Unfortunately, both my IPv4
and IPv6 sessions use the same router ID.

bgp_ip=185.5.34.12  ip=0.0.0.0/0

It seems that something isn't quite right with matching "bgp_id=::1"
against the session originating from ::1. Would you mind seeing if
you can reproduce this?

Thanks!

Charlie


On 31/12/16 11:34, Paolo Lucente wrote:
Hi Charlie,

Definitely a bug, yes. Thanks for your report. This is now fixed:

https://github.com/pmacct/pmacct/commit/ab7d675f1eaa90f753327a07c0184247f5f0517c

Cheers,
Paolo

On Fri, Dec 30, 2016 at 11:37:31PM +0000, Charlie Smurthwaite wrote:
Hi,

I am running pmacctd with 2 BGP sessions to a local bird instance, one
for IPv4 and one for IPv6. I have written a bgp_agent_map a follows:

bgp_ip=127.0.0.1 ip=0.0.0.0/0 filter='ip'
bgp_ip=::1       ip=0.0.0.0/0 filter='ip6'

Unfortunately, the second line fails to parse. The error is:

WARN ( default/core ): [/etc/pmacct/bgp_agent_map:2] required key
missing. Required keys are: 'id', 'ip'. Line ignored.

I have tried various other IPv6 addresses in place of "::1" and they
work, but "::1" and "0:0:0:0:0:0:0:1" will not work. I have tested this
on 1.6.1 and master. Is this a bug?

Thanks!
Charlie


Charlie Smurthwaite
Technical Director

tel.  email. charlie@atech.media<mailto:charlie@atech.media> web. 
https://atech.media

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