RE: OT - eBGP ISP route manipulation

Do a track object looking for 1.0.0.0/8

If there, these static routes will work

ip route 1.5.1.35 255.255.255.255 <next hop> track 10
ip route 1.5.0.163 255.255.255.255 <next hop> track 10

track 10 is looking for reachability to 1.0.0.0/8

I have some more advanced ways to do this with eem's - but let me know

-----Original Message-----
From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of Joe Sanchez
Sent: Monday, June 24, 2013 2:58 PM
To: ccielab_at_groupstudy.com
Subject: OT - eBGP ISP route manipulation

All,

Here is a good one. Let's say you have a connection to an ISP and they are sending you a 1.0.0.0/8 but you only want to able to reach 1.5.1.35 and
1.5.0.163 and you want BGP to run for the dynamic routing, but do not want to see the 1.0.0.0/8 becuase you are routing that network somewhere else.
You are not limited to anything other than the ISP will not change anything and you must keep it as simple as possible.

I've labbed this up with these things in mind.

CPE (customer side)

unsuppress-map (doesn't work)
inject-map (didn't work)
ip-sla (didn't try yet, with static routes et...) enhanced object tracking with IP-SLA using boolean and(or) ( haven't tried this yet).

Let me know what you guys/gals think...

Joe Sanchez

Blogs and organic groups at http://www.ccie.net
Received on Mon Jun 24 2013 - 20:39:57 ART