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

[Fredrik Vöcks]

Hi,

Took a while but here's the SMU to solve /32 routes pointing to null0 in
CEF , available on CCO;

CSCua37747

Regards,

Fredrik Vöcks
Senior IP Network Engineer




On 23 July 2012 20:50, Aaron <aaron1 at gvtc.com> wrote:

> Thanks a bunch Fredrik.  Did TAC tell you this is being worked and filed
> as a bug?  If so, what is the bug CSC number?****
>
> ** **
>
> Aaron****
>
> ** **
>
> *From:* Fredrik Vöcks [mailto:fredrik.vocks at bredband2.se]
> *Sent:* Monday, July 23, 2012 12:09 PM
> *To:* Aaron
> *Cc:* cisco-nsp at puck.nether.net
>
> *Subject:* Re: [c-nsp] vpnv4 nlri in bgp but not marked as > best in
> order to get into rib****
>
> ** **
>
> Yes we have a TAC on this. This is on ASR 9010, IOS XR 4.2.1.****
>
> ** **
>
> Don't upgrade is my opinion. I can keep you posted when SMU is out.****
>
>
> ****
>
> Fredrik Vöcks****
>
> Senior IP Network Engineer****
>
> ****
>
> ** **
>
>
>
> ****
>
> On 23 July 2012 18:57, Aaron <aaron1 at gvtc.com> wrote:****
>
> 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****
>
> ****
>
>  ****
>
> ** **
>
> 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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>  ****
>
> ** **
>