Do you want to use DHCP to assign addresses to the clients behind the 1700 or are you trying to set up a negotiated IP address for the ISDN interface on the 1700?
If you need to have your devices behind the 1700 get IPs from a dhcp server on the far end(in this case the 3640) then just add a scope for the network on the back end of the 1700 and assign the 3640's IP to your backend interface as an ip helper-address. for example lets say you have the following: your 1700's ethernet interface configured to use 192.168.1.1 255.255.255.0 your 3640 has loopback 1 configured as 10.1.2.1 255.255.255.255 you would add the following to your 1700's ethernet interface paragraph... conf t service dhcp interface Fastethernet1/0 ip helper-address 10.1.2.1 255.255.255.255 ! and this to the 3640's config conf t service dhcp ip dhcp excluded-address 192.168.1.1 ip dhcp pool 1700_Back_End_LAN network 192.168.1.0 255.255.255.0 default-router 192.168.1.1 dns-server x.x.x.x x.x.x.x x.x.x.x netbios name-server x.x.x.x x.x.x.x ! Of course you will need a route to reach 10.1.2.1 ip route 0.0.0.0 0.0.0.0 dialerx (x=your DDR for your ISDN BRI) ! That about covers it... Once you fill in the x's you would be ready to tele-commute and leave your bosses at work where they belong... Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=45617&t=45338 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]