From: Simon Grace (SimonG@pcsystems.gr)
Date: Mon Nov 05 2007 - 10:03:21 ART
The first one will match the one AS or Two. Can do either quite happily
although you need a plus
^[0-9]+(_[0-9]+)?$ or it will only match a single digit AS.
The second one the ? will only effect the [0-9]
? one or none occurances.
Now this is the guess bit, I'm assuming that because you've got the _ in
brackets something has to happen, because you don't have the ? on the
outside of the brackets.
So the _ underscore can't be ignored-
Matches a comma (,), left brace ({), right brace (}), left parenthesis,
right parenthesis, the beginning of the input string, the end of the
input string, or a space.
Sorry first post was a mistake, short cut key gone wrong, sent the mail
before I had finished.
Cheers,
Simon.
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
CCIE
Sent: Monday, November 05, 2007 2:22 PM
To: ccielab@groupstudy.com
Subject: What is the difference between those two BGP regular
expressions?
What is the difference between those two BGP regular expressions?
^[0-9]+(_[0-9])?$
^[0-9]+(_[0-9]?)$
Regards,
Amin
This archive was generated by hypermail 2.1.4 : Sat Dec 01 2007 - 06:37:28 ART