[j-nsp] Back-reference in JunOS regular expressions

[Jeff Wheeler]

On Thu, Jul 14, 2011 at 3:00 AM, Jonathan Lassoff <jof at thejof.com> wrote:
> Honestly, what's the use case of a backreference for an AS path?

If you have that feature, you can detect as-path prepends and use that
to influence your path selection.

http://juniper.cluepon.net/ER_Detect_AS-PATH_prepends

-- 
Jeff S Wheeler <jsw at inconcepts.biz>
Sr Network Operator  /  Innovative Network Concepts