[44net] Using Cisco Router as a gateway ?

Hi there I have started to config a Cisco rouer to serve as a gateway for the AMPRNET I put in the command the following lines interface Tunnel0 ip unnumbered Ethernet0 no ip directed-broadcast tunnel source Ethernet0 tunnel destination 132.239.255.131 tunnel mode ipip My question is: Is the IPIP is ame as the AMPRNET do ? (i remember changing the PID from 4 to 94 (or mabe opposite) ) so is the PID of the Router same as what we use now ? (and can someone remind me what we use today?) and is there any command that allow me to change the PID if the default isnt what we use ? If needed the IOS is version 12 Please advice Thanks Forward Ronen - 4Z4ZQ http://www.ronen.org --- This email is free from viruses and malware because avast! Antivirus protection is active. https://www.avast.com/antivirus