Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!umich!samsung!psuvax1!psuvm!SUVM!SYSDEH From: SYSDEH@SUVM.BITNET (Donald E. Hanley) Newsgroups: bit.listserv.novell Subject: The silver bullet . . . Message-ID: Date: 10 Jan 90 19:56:41 GMT Sender: Novell LAN Interest Group Reply-To: Novell LAN Interest Group Lines: 31 Approved: NETNEWS@PSUVM Gateway Has anybody out there experienced anything similar to the following on their networks: We have seven file servers on an Arcnet backbone. Five additional servers are connected to the backbone via internal bridges in the backbone servers. Almost all of the servers have at least two network cards; i. e., each has one or more "local", plus one "global" network connections. Now for the problem: During the last few months we have experienced simultaneous "hits" on the backbone servers which causes just these machines to go incommunicado on all of the networks to which they are connected. They aren't crashed; they just aren't talking or listening anymore. No error messages are displayed on the console or entered in the error log. You can continue to use the console; in particular, you can turn TRACK ON and see that the server thinks that it is still sending routing information on networks to which it is connected. However, a network sniffer program shows no data traffic at all, just the token being passed around. The other file servers, i. e., those not directly connected to the backbone are not affected; they march merrily along, oblivious to the disaster that has befallen their brethern. We are running Advanced and SFT 2.15a and 2.11. Any insights? Ideas? Suggestions? Sympathy?