[c-nsp] BGP Dynamic Neighbors and VPNv4

[Peter Rathlev]

As follow-up for the archives. Short version: It doesn't seem to work.

On Mon, 2009-04-27 at 17:13 +0200, Peter Rathlev wrote:
> Reading about BGP Dynamic Neighbors I can see that the 12.2SX
> Configuration Guide[1] states that only IPv4 peering is supported. Would
> anybody know if this actually means "no IPv6" or if it also means "no
> VPNv4"? I don't currently have a SXH/SXI box to test this from I'm
> afraid.

As Phil said it will eat the configuration, but it doesn't seem to work
for VPNv4 when I test it. The RR clients seem stuck in a "(NoNeg)"
state:

 000088: Jun 15 16:10:37.587 CEST: %BGP-5-ADJCHANGE: neighbor 10.85.248.7 Up
 R2(config-router-af)#do sh ip bgp vpnv4 all sum
 BGP router identifier 10.85.248.11, local AS number 65432
 BGP table version is 1, main routing table version 1
 
 Neighbor        V           AS MsgRcvd MsgSent   TblVer  InQ OutQ Up/Down  State/PfxRcd
 10.85.248.7     4       65432       3       3        0    0    0 00:00:12 (NoNeg)

>From the RR itself:

 000426: Jun 15 16:10:37.591 CEST: %BGP-5-ADJCHANGE: neighbor *10.85.248.11 Up 
 R1(config-router)#do sh ip bgp vpnv4 all sum
 ...
 Neighbor        V           AS MsgRcvd MsgSent   TblVer  InQ OutQ Up/Down  State/PfxRcd
 10.85.248.1     4       65432  252567  250975     1048    0    0 2w6d           17
 BGP peergroup RM-core-RR listen range group members: 
   10.85.248.0/24 
 R1(config-router)#

It logs an adjacency change saying a dynamic ("*") neighbor is up, but
the sessions is not listen under the summary. (Can anybody tell me what
the "(NoNeg)" is btw?)

I guess this means that VPNv4 isn't a supported AF for dynamic
neighbors. :'(

A regular RR setup of course works fine. That's what we'll do then.

This was tested on 12.2(33)SXI1 AIS.

Regards,
Peter