Comments on: Understanding BGP Regular Expressions

By: BGP Expression List @ JonZu Groups

BGP Expression List @ JonZu Groups — Fri, 12 Jun 2009 13:17:21 +0000

[...] List Posted in June 6, 2009 ¬ 1:05 amh.adminNo Comments » Easy AdSense by Unrealhttp://blog.internetworkexpert.com/2008/01/06/understanding-bgp-regular-expressions/ Thanking [...]

By: Harpreet Singh

Harpreet Singh — Wed, 03 Dec 2008 05:42:11 +0000

Sharing another good link for regular expression:-

http://www.juniper.net/techpubs/software/erx/junose61/swconfig-routing-vol1/html/routing-policy-config11.html

See the table at bottom of the page..

regards
Harpreet Singh

By: Matching on AS Path Prepend information. « A Networker Blog

Matching on AS Path Prepend information. « A Networker Blog — Wed, 22 Oct 2008 22:41:56 +0000

[...] is a nice article wrote by Brian McGahan about Regular Expression Possibly related posts: (automatically generated)HTTP/1.1 Pipelining « [...]

By: Brian McGahan, CCIE #8593

Brian McGahan, CCIE #8593 — Tue, 10 Jun 2008 16:30:42 +0000

It should match the same thing. Test it on a route server to be 100% sure.

By: Nizami

Nizami — Tue, 06 May 2008 10:03:06 +0000

hi Brian. i have a question.how to match on AS and all its directly connected customers with taking into consideration the future growth.
what is the difference between theese regular expressions? Say we have AS 100.

^100(_[0-9]+)?$
and

^100_[0-9]*$
will result be the same?

By: Brian McGahan, CCIE 8593

Brian McGahan, CCIE 8593 — Thu, 10 Jan 2008 02:30:00 +0000

You need to escape the dot with a backslash. You could say 65000\.65000

By: shef

shef — Wed, 09 Jan 2008 08:16:13 +0000

yes.

2-byte AS have dot: 65000.65000 for example. Dot in regexp – any single character

By: Brian McGahan, CCIE 8593

Brian McGahan, CCIE 8593 — Tue, 08 Jan 2008 21:52:46 +0000

What is an example case of this?

By: shef

shef — Mon, 07 Jan 2008 12:28:59 +0000

And what we should do with 2-byte AS’s?
Thanks.