Hello, We are currently fixing our routing policy for clients using dialup-ISDN connections and are facing some problems. Theorically (Cisco point of vue), avery network should have a different number. That means we need 3 network ranges (our network, ISDN network and client network). As IP address space is becoming quite scarce these days, we don't want to use registered addresses for the ISDN network (it doesn't have to be visible from the Internet). We have three solutions : - use RFC1597 addresses, but there is no reverse DNS for such addresses (problem when doing a traceroute) - use some kind of unnumbered scheme, but it's difficult to manage on Cisco routers with multiple dial-in BRI. - use a registered addresses anyway ... Any advice, experience ? --

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