Re: Regular Expression ^$

Prakash,

This regexp (^$) refers to a null string. In BGP AS-PATH logic (again in
BGP) this occurs when you're talking about a route which has been generated
locally within your own AS.

you might wish to visit this:
http://www.cisco.com/en/US/tech/tk365/technologies_tech_note09186a0080094a92.shtml

HTH
Kambiz Agahian

CCIE Instructor/Consultant
M.Eng Telecom, CCIE# 25341, CCSI# 33326, MCSE, MCSA

On Fri, Aug 13, 2010 at 3:02 AM, Sadiq Yakasai <sadiqtanko_at_gmail.com> wrote:

> hmm, I think that will actually match on *nothin*!
>
> If you want to match on *any* then you should be regex'ing something like:
> ^.*$
>
> On Fri, Aug 13, 2010 at 10:57 AM, Prakash Kalsaria <
> kalsaria.prakash_at_gmail.com> wrote:
>
> > Regular expression
> >
> > ^ ----Start of string
> >
> > $ -- End of String
> >
> > what will be matched if i as-path access-list 111 permit ^$
> >
> > every AS OR Any AS
> >
> >
> >
> > Regards;
> > Prakash
> > http://prakashkalsaria.wordpress.com
> >
> >
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> CCIEx2 (R&S|Sec) #19963
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Received on Fri Aug 13 2010 - 03:07:45 ART