Peers do not find each other

Hi,

Background:
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I try to connect two peers, call them peer A and peer B,  which are 
plugged in at the same router. I do *not* configure any rendezvous 
peers, because for my projekt a want to give away just a CD with the 
Peer-2-Peer Software and everybody in the same network, who uses the CD, 
should find all the other users automatically, without asking a 
administrator for settings. (At least that's the idea)

Settings:
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As a special I set the rendezvous seed peers to something stupid, e.g. 
tcp://127.0.0.1:19999, because if I leave this option empty, it always 
tries to connect automatically to the official jxta.org rendezvous peers 
what I don't want. I do *not* enable the option "use only configured 
seed peers" such that it should also look for lokal rendezvous via 
multicast. Btw. TCP and Multicast is enabled. All firewalls are 
disabled. My program waits 20 seconds in order to find a rdvs or to 
become a rdvs by itself (this is made by a piece of code Muhamed 
committed to the mailing list ...)

Experiment:
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With these settings peer A and peer B don't find each other. Moreover 
the program does not say that it has become a rdvs by itself.

Now I configure peer A as a rendezvous and restart it without restarting 
peer B (the edge peer).

Again they don't find each other.

Now I restart peer B (the edge peer).

Again they don't find each other.

Now I configure peer B to use peer A as a rendezvous (seed rendezvous) 
and restart it without restarting peer A.

Now everything works fine!

Then I stop peer A (the rendezvous) and restart it.

Again they don't find each other.

Question:
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Is anybody out there who can explain this behaviour? I thought that at 
least in the same subnet all peers find each other automatically as long 
as multicast is enabled even without an explicit rdv peer. Obviously as 
soon as peer A is offline for some seconds every communication between A 
and B seems to be impossible. I don't think that you guys out there are 
using a p2p network where everybody must reboot his application because 
somebody else shutdown his peer ;) So what's the trick?



greetings