From: Vijay babu (dotcomvijay@gmail.com)
Date: Wed Jul 04 2007 - 06:15:54 ART
^([0-9]+)(_\1)*$
This AS path list selects updates from the neighboring AS (with 2 digits)
and with 0 or more repetions of itself.
Example 01_01
Eample 99_99
The AS repeats in the above examples which means AS Prepending has been
done.
Cheers
Vijay
On 7/4/07, Mike Hwang <empires@hanaro.com> wrote:
>
> Hi ! folks
>
> I didn't know below regular expression.
> Pls. explain to me for example...
>
> Thanks
> Mike
>
> -------------------------------------------------
>
> ip as-path access-list 101 permit ^([0-9]+)(_\1)*$
>
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