[c-nsp] vpnv4 nlri in bgp but not marked as > best in order to get into rib

[Aaron]

Mine is Asr9000 – 4.1.2

 

You said “Bgp inserts /32’s pointing to null0 for unknown reasons!!! ???
What platform are you seeing this on Fredrik?

 

Do you have a tac case working on that ?  did cisco tell you about a bug id
with that ?  is there an smu that solves it ?

 

I was gonna upgrade to 4.2.1 one of these days but that scares me.

 

Aaron

 

 

 

From: Fredrik Vöcks [mailto:fredrik.vocks at bredband2.se] 
Sent: Monday, July 23, 2012 11:46 AM
To: Aaron
Subject: Re: [c-nsp] vpnv4 nlri in bgp but not marked as > best in order to
get into rib

 

Hi,

 

What platform are you talking about? 

 

We have some nasty BGP bugs in IOS XR 4.2.1. Our problem is that 4.2.1
inserts /32 routes pointing to null0 for unknown reasons.

 

Fredrik Vöcks

Senior IP Network Engineer

  <http://www.bredband2.com/epost/logo_epost.jpg> 

 





On 23 July 2012 15:37, Aaron <aaron1 at gvtc.com> wrote:

Have y'all ever seen this ?



I was learning vpnv4 prefixes from pe far away in my local bgp table, but
strangely none were marked > best.  Sh route vrf one 1.2.3.0 showed routed
to null0 for a /18 that I have as a static in order to advertise larger cidr
to my isp.  So as packets came from internet they were sent to bit bucket
for 1.2.3.0/24 and customer was having no connectivity.



I simply removed import from vrf one and readded it and BAM, bgp marked as
best and installed into rib and customer could surf.



Aaron

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