From: stefan vogt (stefan-uwe_vogt@web.de)
Date: Thu Nov 14 2002 - 19:30:31 GMT-3
Hi,
Assume this refers to a document on CCO:
http://www.cisco.com/en/US/tech/tk648/tk365/technologies_tech_note09186a0080094a92.shtml
...networks originated from AS 4 and all directly attached ASs of AS 4.
ip as-path access-list 1 permit ^4_[0-9]*$
But my config would be
ip as-path access-list 1 permit ^4(_[0-9]+)?$
+ => 1 or more times
* => 0 or more times
? => 0 or 1 times
Which one is correct? In my opinion in ^4_[0-9]*$ is not correct. If I'm wrong, please correct me.
Thanks,
Stefan-Uwe
"Joe Martin" <jmartin@capitalpremium.net> schrieb am 14.11.02 17:16:14:
> I'll take a shot at it just to see if I understand.
> I believe this is saying accept any route originated in AS 4, regardless of
> any other AS's it has passed through, including none.
>
> Someone help me if I'm wrong.
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
> Emmanuel Guilain
> Sent: Thursday, November 14, 2002 8:01 AM
> To: ccielab@groupstudy.com
> Subject: Re: bgp as-path
>
>
> ----- Original Message -----
> From: "csc david" <davidcsc2002@yahoo.com.cn>
>
> > ip as-path access-list 1 permit ^4_[0-9]*$
>
> [] represents an item
> * means N occurences of de preceding item
> 0-9 means a digit from 0 to 9
>
> So [0-9]* means N occurences of digit from 0 to 9
>
> Tell me if I'm wrong
>
> Emmanuel
This archive was generated by hypermail 2.1.4 : Tue Dec 03 2002 - 07:23:00 GMT-3