on the sun box. Toss a new/different switch/hub or cold boot it. Same problem rip the guts out of the hme int. hmebla down hmebla hmebla unplumb hmebla plumb hmebla A.b.C.D netmask A.B.C.mask <ret>
hmebla up
see if does the same thing, if so sysunconfig, rips all the identity out odf the guts, will need a reboot then re-apply hostname, dns, all ip settings.
thanx,
bill