rsh/rlogin strange behavior

[Wojciech Puchar]

i use rsh/rlogin regularly within LAN and over encrypted tunnels
it works generally fine but have strange behavior

when i output long amount of text in console (eg. cat bigfile), where long 
is like 20kB it

a) display part of it and hangs (i have to kill rlogin) - rarely
b) display part of it and rest is skipped. then i can work normally.


ssh doesn't have such a problem.

what is wrong?