Neil,

Thank you for your quick response. I have tried the ping command and it works OK. I tried the traceroute and it seems to

not to work. (1 * * * etc.) Do you have any idea why this is happening? (What is the TTCP? Sorry i am a newbie)

What should i check?

Gkikas

PS: I am currently testing the MPICH1.2.5.2 and i am running a big job in order to test the stability of the cluster.

Would this interrupt with the traceroute? The ping seems to work just fine. When i tested the LAM i was not running

the MPICH. Should i try traceroute without the MPICH1.2.5.2 runing??? I think it should work fine just as the ping.

RE:

>

Gkikas,

Have tried running a TCP/IP test (e.g. TTCP, ping, traceroute) between the various nodes, to make sure that you don't have an intermittent network problem. This should indicate whether or not the problem is really a LAM issue or a hardware on.

Regards
Neil Storer