EIGRP default-information in/out

Experts,

I was testing EIGRP default-information command with the use of ip
default-network. I found that ip default-network DOES propagate to other
downstream EIGRP same AS devices and they will use this classfull address
as a candidate default if they have a route to it. Interesting.. So I
thought about how I'd filter this.

My setup was as follows:

(R1) ---- ---- (R2) ---- ---- (R3)

If R1 sets the ip default-network, than R2 and R3 will set a candidate
default. I was able to filter this at any point with the following:
no default-information in/out on any device for control.

It didn't seem to matter if I used no default-information allowed in/out or
no default-information in/out at either the ingress or egress points at any
device. I was required to bounce the interface to see the candidate default
drop off.

So my question is.. What is the difference in the "allowed" feature in the
default-information command within the EIGRP process?

thank you
Christian Hunter

Blogs and organic groups at http://www.ccie.net
Received on Sun Dec 18 2011 - 13:07:57 ART