From: IPSec (ipsec@xxxxxxxxxxxxx)
Date: Fri Feb 15 2002 - 04:18:22 GMT-3
Brian, thanks for the url!
I logged on and played a few regexp's on it.
My understanding of ? is 0 or 1 occurance of the preceding character, which in
my question is a space.
and * is 0 or multiple occurances, which in my question is a single digit of 0
to 9. And ^ and $ are beginning and end of the as-Path.
I guess what I don't understand is Halabi used it to refer any AS's from neighb
or AS1 and AS1's neighbor.
How does that ^1 ?[0-9]*$ as_path translate to that?
IPSec
-----Original Message-----
From: Brian Dennis <brian@5g.net>
To: IPSec <ipsec@myrealbox.com>, ccielab@groupstudy.com
Date: Thu, 14 Feb 2002 22:32:23 -0800
Subject: Re: Halabi's AS_PATH
IPSec, (if that is your real name ;-)
Telnet to this route server:
ner-routes.bbnplanet.net
and play around with these three commands:
sho ip bgp regexp ^701$
sho ip bgp regexp ^701 ?[0-9]*$
sho ip bgp regexp ^701_
You should quickly be able to find the answer to your question.
Brian Dennis, CCIE #2210 (R&S)(ISP/Dial)
On Thursday 14 February 2002 09:54 pm, IPSec wrote:
> There's multiple references to an as_path of
> ^1 ?[0-9]*$ in Halabi's Chapter 12.
> Could someone explain to me what that as_path means?
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