From: Syv Ritch (syv@911networks.com)
Date: Thu Sep 22 2005 - 00:22:49 GMT-3
Schulz, Dave wrote:
> Leigh -
>
> I didn't see a follow up on your question. But I believe that if you
> want to have the AS123 and it's neighbors, you will need to two lines:
>
> ip as-path access-list 1 permit ^123
> ip as-path access-list 1 permit ^123_[0-9]+
>
1 line only:
^123_[0-9]*$
^ beginning of line
123 = connected
_[0-9]* = 0 AS or 1 AS [+ would be only 1 AS]
$ = end of line
It's there almost at the bottom of the page:
http://www.911networks.com/pages/cisco/bgp/regular-expressions.php
>
> Dave Schulz,
> Email: dschulz@dpsciences.com
>
>
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> syv@911networks.com
> Sent: Sunday, September 18, 2005 5:33 PM
> To: Leigh Harrison
> Cc: Cisco certification
> Subject: Re: BGP Reg Exp
>
> Leigh Harrison wrote:
>
>>All,
>>
>>If I wanted to allow a neighboring AS(123) and his directly connected
>>AS's to be seen as routes to me, could this be written as:
>>
>>ip as-path access-list 1 permit ^123_[0-9]*$
>
>
> http://www.911networks.com/pages/cisco/bgp/regular-expressions.php
>
>
>>OR
>>ip as-path access-list 1 permit ^123_.*$
>>OR
>>ip as-path access-list 1 permit ^.+_[0-9]*$
>>OR
>>ip as-path access-list 1 permit ^.+_.*$
>>OR
>>ip as-path access-list 1 permit ^[0-9]+_[0-9]*$
>>OR
>>ip as-path access-list 1 permit ^[0-9]+_.*$
>>
>>Could someone have a quick look and let me know if that would be the
>>same thing ? I think I'm getting there!! The only niggle in the back
>
>
>>of my mind is ^123_.*$ (for example), would I need a "+" after the 123
>
> ?
>
>>Many thanks,
>>LH
>>
>>
>
> _______________________________________________________________________
>
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>>
>
>
>
-- Thanks http://www.911networks.com When the network has to work Cisco/Microsoft
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