Re: BGP REGEXP

This is just for us lab rats.. The rest of the world googles it and then
forgets it over the next year or so. Unless you happen to be into
scripting..

Re: BGP REGEXP

Gary Duncanson
to:
Keegan.Holley
07/12/09 12:49 PM

Cc:
ccielab

Is the internet really reliant on all this anal regex nonsense? If it is
I'm
surprised it actually works.
----- Original Message -----
From: <Keegan.Holley_at_sungard.com>
To: "andrew" <andrew.coates_at_internode.on.net>
Cc: "'Chris Breece'" <cbreece1_at_gmail.com>; "'Cisco certification'"
<ccielab_at_groupstudy.com>; <nobody_at_groupstudy.com>; "'Ryan West'"
<rwest_at_zyedge.com>
Sent: Sunday, July 12, 2009 3:42 PM
Subject: RE: BGP REGEXP

> I'm not an expert on regex, I hate the damn things honestly, but
couldn't
> you just do ^54_.*$ and match 54 and anything else or nothing else.
> Note, this sounds like a lab question but if it isn't you should
probably
> permit some stuff before this line if 54 is a transit AS and you are
using
> it as a backup internet connection. Like ^54_(701)*_.*$ If this is
just
> a lab disregard.
>
>
> Keegan Holley ? Network Engineer I ? SunGard Availability Services ?
> 401 North Broad St. Philadelphia, PA 19108 ? (215) 446-1242 ?
> keegan.holley_at_sungard.com
> Keeping People and Information Connected. ?
> http://www.availability.sungard.com/
>
> P Think before you print
>
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>
>
>
>
> RE: BGP REGEXP
>
> andrew
> to:
> 'Ryan West', 'Chris Breece', 'Cisco certification'
> 07/11/09 09:58 PM
>
>
> Sent by:
> nobody_at_groupstudy.com
> Please respond to "andrew"
>
>
>
>
>
>
> Yes exactly, aren't we talking about directly connected customers?
>
> cheers
>
> -----Original Message-----
> From: Ryan West [mailto:rwest_at_zyedge.com]
> Sent: Sunday, July 12, 2009 11:50 AM
> To: andrew; 'Chris Breece'; 'Cisco certification'
> Subject: RE: BGP REGEXP
>
> ^54_[0-9]*$ shows all directly customers of AS54 including just AS54
> announcements, but nothing beyond that.
>
> -ryan
>
> -----Original Message-----
> From: andrew [mailto:andrew.coates_at_internode.on.net]
> Sent: Saturday, July 11, 2009 6:40 PM
> To: Ryan West; 'Chris Breece'; 'Cisco certification'
> Subject: RE: BGP REGEXP
>
> A straight ^54_[0-9]*$ will work as well
>
>
>
> -----Original Message-----
> From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of
> Ryan
> West
> Sent: Sunday, July 12, 2009 11:28 AM
> To: Chris Breece; Cisco certification
> Subject: RE: BGP REGEXP
>
> Chris,
>
> Either 's ip b q ^54_' or 's ip b q ^54(_[0-9]+)*$' should work for
> customers and all their future customers.
>
> -ryan
>
> -----Original Message-----
> From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of
> Chris Breece
> Sent: Saturday, July 11, 2009 6:13 PM
> To: Cisco certification
> Subject: Re: BGP REGEXP
>
> Theres a way to do it if your customer or customers customer is
prepending
> too... but I am drawing a blank. Someone smart want to chime in? :P
>
>
>
>
> On Sat, Jul 11, 2009 at 9:06 PM, Chris Breece <cbreece1_at_gmail.com>
wrote:
>
>> Man, I hate regex like no-bodies business... but try this...
>>
>> ^54(_[1-9]+)?$
>> Test it out with "show ip bgp regex ^54(_[1-9]+)?$".
>>
>> When you type it in make sure to do control-v before you type in the ?
> or
>> IOS will do context senstive help on ya.
>>
>> Chris
>>
>>
>>
>>
>> On Sat, Jul 11, 2009 at 12:53 PM, G2 <farawayguy_at_gmail.com> wrote:
>>
>>> Is there a regular expression that will match the following in one
> line:
>>>
>>> -Routes originated in AS54
>>> -Customers of AS54
>>>
>>> I know you can do one for each, but how would you do this in one
>>> statement?
>>>
>>> Thanks,
>>> Gary
>>>
>>>
>>> Blogs and organic groups at http://www.ccie.net
>>>
>>>
Received on Sun Jul 12 2009 - 23:24:02 ART