>itojun,
>Thanks for your help.  I have the 2 PCs connected through a RS232
>cable on Serial port 0 (/dev/tty00).   I do not dial into an ISP,
>thus I am not using a chat file. But when I specify the IPv6 source
>and destination addresses in the /etc/ppp/options file, it gives
>this error of "Prefix Length not specified". Could you try this at
>your end and let me know if it works or am I missing something in
>it?

	i can try that later, but one thing - 
	you don't really need to specify src/dst address.  they will be
	generated automagically if you don't specify them.

itojun