isdn being raised because of broadcast's

[mary_odriscoll]

Hi, running IP plus 12.0(9) on a 2600. We implement isdn as backup to frame with the isdn backup instigated by floating static. However, ever since the ios was amended, we have noticed that the isdn keeps on making spurious calls for no reason. With debug dialer , we have noticed that the isdn has been raised because of hosts sending out broadcasts (all f's).

I have no ip domain-lookup configured, any other ideas?

[deilert]

This ACL should help

access-list 101 deny eigrp any any

access-list 101 deny ip any host 224.0.0.0 0.0.0.255

access-list 101 deny ip any host 255.255.255.255

access-list 101 deny udp any any eq ntp

access-list 101 permit ip any any log

dialer-list 1 protocol ip list 101

[mary_odriscoll]

Thanks, will try the above!