well, my current node:

[bmanning@bloat bmanning]$ ifconfig
eth0      Link encap:Ethernet  HWaddr 00:40:96:3A:42:B5  
          inet6 addr: fe80::240:96ff:fe3a:42b5/10 Scope:Link
....
and I guess you are doing something like this:

%ping6 fe80::240:96ff:fe3a:42b5
connect: Invalid argument
%ping6 fe80::240:96ff:fe3a:42b5/10
unknown host
%ping6 ::1                        
PING ::1(::1) from ::1 : 56 data bytes
64 bytes from ::1: icmp_seq=0 hops=64 time=50 usec
...

so, what you really want to do is to follow the instructions, which
are slightly more complex than the v4 version of ping....

%ping6 -I eth0 fe80::240:96ff:fe3a:42b5
PING fe80::240:96ff:fe3a:42b5(fe80::240:96ff:fe3a:42b5) from ::1 eth0: 56 data bytes
64 bytes from fe80::240:96ff:fe3a:42b5: icmp_seq=0 hops=64 time=51 usec
64 bytes from fe80::240:96ff:fe3a:42b5: icmp_seq=1 hops=64 time=42 usec

--- fe80::240:96ff:fe3a:42b5 ping statistics ---
2 packets transmitted, 2 packets received, 0% packet loss
round-trip min/avg/max/mdev = 0.042/0.046/0.051/0.008 ms





% 
% --- Bill Manning <[EMAIL PROTECTED]> wrote:
% > % The basic problem:  I need to send messages using
% > raw
% > % sockets between two linux systems connected to the
% > % Internet(both systems have ipv6 module compiled). 
% > How
% > % do I assign ipv6 addresses to both of them and
% > % establish a connection between them ?
% > 
% >  if they are on the same network, the automatically
% > assigned
% >  numbers ought to be just fine.
% > 
% 
% Thanks for the speedy reply.
% 
%    But 'ping6 <ipv6 address>' doesnot work !! (I used
% the automatically assigned ipv6 address) It gives an
% error saying:
% 
%    "unknown host"
% 
% This error appears even when i use the ipv6 address of
% the same machine !
% 
% what do I do ?
% 
% 
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-- 
--bill
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