[c-nsp] regular expression notation for as-path representation

Scott Granados sgranados at jeteye.com
Fri Mar 17 18:11:04 EST 2006


Ah I didn't use the proper terminology in my search, thank you for the
pointers.


-----Original Message-----
From: Bruce Pinsky [mailto:bep at whack.org] 
Sent: Friday, March 17, 2006 3:01 PM
To: Scott Granados
Cc: cisco-nsp at puck.nether.net
Subject: Re: [c-nsp] regular expression notation for as-path
representation

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Scott Granados wrote:
>  
> 
> I know this is a really basic question but this is something until
> recently I never had to be that familiar with.  Could someone if it's
> simpleenough explain the language for expressing things like as-paths
or
> better provide a pointer to a web site.  I tried some googling but
> nothing really obvious.
> 
>  
> 
> For example if I want to prefer all the routes I learn via level3 from
> uunet and it's customers how could I express that?
> 


This Google search using "regular expression examples bgp"
http://www.google.com/search?q=regular+expression+examples+bgp&start=0&i
e=utf-8&oe=utf-8&client=firefox-a&rls=org.mozilla:en-US:official

rendered just a few of these examples:

http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122cgcr/
ftersv_c/ftsappx/tcfaapre.htm
http://danno.appliedi.net/drupal/?q=node/76
http://muse.linuxmafia.org/lost+found/regular-expression.howto
http://www.juniper.net/techpubs/software/erx/erx50x/swconfig-routing-vol
1/html/routing-policy-config10.html


- --
=========
bep

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