From: Brian McGahan (bmcgahan@internetworkexpert.com)
Date: Thu Apr 13 2006 - 10:38:32 GMT-3
Yes that expression should work as well. Telnet to a route-server on
the internet to play around with the "show ip bgp regexp" command to
test out your regular expressions: http://www.routeviews.org/
HTH,
Brian McGahan, CCIE #8593
bmcgahan@internetworkexpert.com
Internetwork Expert, Inc.
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> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
Of
> Wang, Ting (Taylor)
> Sent: Thursday, April 13, 2006 2:13 AM
> To: CCIE Group Study (E-mail)
> Subject: IEWBv2 Lab 9 - 6.4 BGP filter
>
> Hi Group,
>
>
> IEWBv2 lab 9 - 6.4 : "configure R6 to only accept prefix from BB1 that
> have been originated by themselves and their directly connected
> customers."
> WB Solution:
> R6:
> router bgp 100
> neighbor 54.2.1.254 filter-list 25 in
> !
> ip as-path access-list 25 permit ^54(_[0-9]+)?$
>
>
> I have another solution for regexp:
> ip as-path access-list 25 permit ^54_[0-9]*$
>
> Is it totally equivalent to the WB solution, and meet the requirement?
>
> Thanks,
>
> Taylor
>
>
This archive was generated by hypermail 2.1.4 : Mon May 01 2006 - 11:41:57 GMT-3