[rbak-nsp] MPLS VPN import map equivalent command

[emvergb at gmail.com]

Hi Blake,
Thanks for the tip.  Also, one way I resorted to fix this issue is creating
an import map within the BGP context itself.  The commands though are not as
simple as the equivalent one-liner.

Regards,
Emver

-----Original Message-----
From: redback-nsp-bounces at puck.nether.net
[mailto:redback-nsp-bounces at puck.nether.net] On Behalf Of Blake Willis
Sent: Thursday, January 27, 2011 1:30 AM
To: redback-nsp at puck.nether.net
Subject: Re: [rbak-nsp] MPLS VPN import map equivalent command

On 26 Jan 2011, at 18:00, redback-nsp-request at puck.nether.net wrote:

> Date: 26 January 2011 14:27:44 GMT+01:00
> Subject: Re: [rbak-nsp] MPLS VPN import map equivalent command
> Hi Marvin,
>
> I've been having the same issue as you for a long time already.   
> Looks like Redback hasn't coded on that version the functionality  
> of creating a route-map for the import map command.  Let's wait for  
> others advice. =)
>
> Regards,
> Emver

The last time I was developing around this and asking our SE about  
it, it seemed pretty clear that it was an architectural design issue  
& not a "bug".  I haven't checked the release notes for the latest  
versions, but I'd be surprised if anything has changed.

We deal with it in two ways:

1) design your export & redistribute maps so that pretty much  
everything can be dealt with uniquely by selecting which targets you  
import (without being able to use an import map)

2) use Junipers in circumstances where method 1 isn't good enough  
(e.g. change a metric or localpref at import).  <grin>

Be aware that import/export on the same box and inter-router BGP  
import/export are really not handled the same way, (pay particular  
attention to weights).  Also, you can't match & set the same  
attribute in the same stanza (e.g. "match metric 5" & "set metric  
100" won't work).  You really need to test the heck out of your route  
maps before putting them in production as they will most likely not  
do what you mean for them to do the first time around.

  -Blake

---
  Blake Willis
  Network Architect
  iBrowse


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