Hi,

The dialer list instructs what can bring the BRI interface up and dial out. In your case you don't want EIGRP to bring the interface up so you deny at the top of the ACL and then permit ip any. Once the interface has been triggered and the BRI interface is up, the dialer list does nothing so EIGRP will neighbor with the other side...assuming IP addressing and EIGRP configs are correct.

HTH

Amolak:

Your interpretation and understanding of what the access list and dialer list are doing is correct. However, the piece you're missing is that the dialer list is only effective in defining "interesting" traffic.

In this case, according to the dialer list, EIGRP updates are not "interesting" and therefore will not force the BRI interface to come up when the primary link is functioning, as you rightly pointed out. However, once the BRI interface is activated (Let's say as a result of the primary link going down and a default floating static route that points to the ISDN interface taking effect), the floodgates will be opened and everything will then be allowed to pass, including EIGRP packets.

If you wanted to filter traffic after the BRI interface begins passing traffic, a conventional access list must be applied to the BRI interface itself.

HTH

Victor