Need your opinion.

4 servers running NW OES 6.5 in a cluster. For some reason this morning,
network connectivity was interupted. 3 of the 4 servers abended. I was
not able to get a dump as the keyboard was not responsive. The server
that did not go down, had an error regarding losing the network
connectivity, and regaining it moments later, that is why I assumed that
all servers lost connectivity.

Has this ever happened to you?