Login | Register For Free | Help
Search for: (Advanced)

Mailing List Archive: Cisco: NSP

Cisco BGP Advertised as-path prepends

 

 

Cisco nsp RSS feed   Index | Next | Previous | View Threaded


jwhardeman at gmail

Aug 7, 2011, 9:59 PM

Post #1 of 3 (896 views)
Permalink
Cisco BGP Advertised as-path prepends

Hey Guys,

I have a question regarding displaying the as-path prepends that I am
announcing to my providers. With a foundry I could display the prepends
that I am announcing out, but I don't seem to be able to do that with the
Cisco or at least I haven't found the command. Does anyone know the command
I can run on a cisco to show this info? I would like to make sure my route
maps are injecting the as-path prepends properly.

Thanks

Joe
_______________________________________________
cisco-nsp mailing list cisco-nsp [at] puck
https://puck.nether.net/mailman/listinfo/cisco-nsp
archive at http://puck.nether.net/pipermail/cisco-nsp/


kenny.sallee at gmail

Aug 7, 2011, 11:28 PM

Post #2 of 3 (853 views)
Permalink
Re: Cisco BGP Advertised as-path prepends [In reply to]

On Sun, Aug 7, 2011 at 9:59 PM, Joseph Hardeman <jwhardeman [at] gmail>wrote:

> Hey Guys,
>
> I have a question regarding displaying the as-path prepends that I am
> announcing to my providers. With a foundry I could display the prepends
> that I am announcing out, but I don't seem to be able to do that with the
> Cisco or at least I haven't found the command. Does anyone know the
> command
> I can run on a cisco to show this info? I would like to make sure my route
> maps are injecting the as-path prepends properly.
>
> Thanks
>
> Joe
>

I don't think there is a command in IOS to do that. You can view the local
BGP table for the route - it will show prepending there. show ip bgp nei
<ip> advertised-routes doesn't show the prepending....so I use an external
route server to verify that type of stuff.

Kenny
_______________________________________________
cisco-nsp mailing list cisco-nsp [at] puck
https://puck.nether.net/mailman/listinfo/cisco-nsp
archive at http://puck.nether.net/pipermail/cisco-nsp/


jwhardeman at gmail

Aug 8, 2011, 3:54 AM

Post #3 of 3 (848 views)
Permalink
Re: Cisco BGP Advertised as-path prepends [In reply to]

Hey Guys,

Thanks for the answers and they are all what I am expecting. I haven't been
able to find the command either. :-( I guess I will have to go with
setting up a route server for testing with to make sure my route-maps are
right.

The problem with the route server, Ziv, is that with advertising over
multiple providers I can't be certain that they will display all of the
routes in to me.

I wish the IOS did display the announcements.

Thanks

Joe

On Mon, Aug 8, 2011 at 2:35 AM, Ziv Leyes <zivl [at] gilat> wrote:

> I'd like to know if there's a way to see it in my own router, but what I do
> to see the prepends is to get into a route server, such as
> route-views.oregon-ix.net (my favorite) and check how the world sees the
> prefix with "show ip bgp x.x.x.x"
> If the prepends were injected correctly, you will see them on the as-path.
> Hope this helps,
> Ziv
>
>
> -----Original Message-----
> From: cisco-nsp-bounces [at] puck [mailto:
> cisco-nsp-bounces [at] puck] On Behalf Of Joseph Hardeman
> Sent: Monday, August 08, 2011 7:59 AM
> To: cisco-nsp [at] puck
> Subject: [c-nsp] Cisco BGP Advertised as-path prepends
>
> Hey Guys,
>
> I have a question regarding displaying the as-path prepends that I am
> announcing to my providers. With a foundry I could display the prepends
> that I am announcing out, but I don't seem to be able to do that with the
> Cisco or at least I haven't found the command. Does anyone know the
> command
> I can run on a cisco to show this info? I would like to make sure my route
> maps are injecting the as-path prepends properly.
>
> Thanks
>
> Joe
> _______________________________________________
> cisco-nsp mailing list cisco-nsp [at] puck
> https://puck.nether.net/mailman/listinfo/cisco-nsp
> archive at http://puck.nether.net/pipermail/cisco-nsp/
>
>
>
>
> ************************************************************************************
> This footnote confirms that this email message has been scanned by
> PineApp Mail-SeCure for the presence of malicious code, vandals & computer
> viruses.
>
> ************************************************************************************
>
>
>
>
> The information contained in this e-mail message and its attachments is
> confidential information intended only for the use of the individual or
> entity named above. If the reader of this message is not the intended
> recipient, you are hereby notified that any dissemination, distribution or
> copying of this communication is strictly prohibited. If you have received
> this communication in error, please notify us immediately by replying to the
> sender, and then delete the message from your computer. Thank you!
>
> ******** This mail was sent via Mail-SeCure System.********
>
>
>
>
>
>
> ************************************************************************************
> This footnote confirms that this email message has been scanned by
> PineApp Mail-SeCure for the presence of malicious code, vandals & computer
> viruses.
>
> ************************************************************************************
>
>
>
>
_______________________________________________
cisco-nsp mailing list cisco-nsp [at] puck
https://puck.nether.net/mailman/listinfo/cisco-nsp
archive at http://puck.nether.net/pipermail/cisco-nsp/

Cisco nsp RSS feed   Index | Next | Previous | View Threaded
 
 


Interested in having your list archived? Contact Gossamer Threads
 
  Web Applications & Managed Hosting Powered by Gossamer Threads Inc.