RE: BGP regular expression

From: Phillip.McCollum@ins.com
Date: Thu May 01 2008 - 14:17:26 ART

My guess is that ^ represents the beginning of an input string and _ can also represent the beginning of an input string. Therefore, your 4th query is looking for the beginning of the string and then a space while your 3rd query is looking for either a space or beginning of an input string. Anyone know if I'm incorrect in my interpretation?

http://www.cisco.com/en/US/docs/ios/12_2/termserv/configuration/guide/tcfaapre_ps1835_TSD_Products_Configuration_Guide_Chapter.html

Phillip

-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of Rakesh Hegde
Sent: Thursday, May 01, 2008 9:28 AM
To: ccielab@groupstudy.com
Subject: BGP regular expression

Guys,

I've got the following routes in the bgp table

192.168.1.0 100
192.168.2.0 100 100 100
192.168.3.0 100 200 300

1. Sh ip bgp reg (_100_)+ as expected lists all 3 networks

2. Sh ip bgp reg ^(_100_)+ as expected lists all 3 networks

3. Sh ip bgp reg (_100_)+$ as expected lists 192.168.1.0 and 192.168.2.0

4. Sh ip bgp reg ^(_100_)+$ lists only 192.168.1.0 .

Any idea why no 4 is not listing 192.168.2.0 ?

Thanks in advance

-Rakesh

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