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From: lockrey%36975%essdp2%garfld.span@SDS.SDSC.EDU
Newsgroups: comp.os.vms
Subject: Ethernet Line Sync Errors?
Message-ID: <870722185440.00n@Sds.Sdsc.Edu>
Date: Wed, 22-Jul-87 14:54:39 EDT
Article-I.D.: Sds.870722185440.00n
Posted: Wed Jul 22 14:54:39 1987
Date-Received: Sat, 25-Jul-87 04:39:34 EDT
Sender: daemon@ucbvax.BERKELEY.EDU
Distribution: world
Organization: The ARPA Internet
Lines: 32


Network Wizards:

  Lately we have been having a rash of 'Line Synchronization Errors'
on the uVAXen connected to our multi-segment ethernet.  This problem
does not seem to be confined to just one segment. And it does not
seem to affect our Clusters (78X & 8XXX machines) which are also
on the ethernet, but on their own segment.

Since we use uVAXen as PC file servers, it's a real pain because
every PC on the net is dropped when the Line Sync Errors happen.

Does anybody know what a Line Sync Error means in the Ethernet
domain?  Does it have anything to do with the heartbeat?

Local DEC installed some patches to the uVAX which didn't help a bit.

Can this kind of problem be caused by electrical noise getting into
Ethernet? A bad Bridge / Repeater. It has not always happened.  

Are there tools to locate the cause of these Errors?
Ethernim does not help in this cases. 

Any and all help greatly appreciated.

Brian Lockrey
Battelle Columbus Labs

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