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- Path: sparky!uunet!dtix!darwin.sura.net!zaphod.mps.ohio-state.edu!news.acns.nwu.edu!telecom-request
- From: dem@nhmpw2.fnal.gov (David E. Martin)
- Newsgroups: comp.dcom.telecom
- Subject: Severe Combinet Problem
- Message-ID: <telecom12.851.6@eecs.nwu.edu>
- Date: 15 Nov 92 18:24:25 GMT
- Sender: Telecom@eecs.nwu.edu
- Reply-To: dem@fnal.fnal.gov
- Organization: Fermi National Accelerator Laboratory, Batavia, IL, USA
- Lines: 19
- Approved: Telecom@eecs.nwu.edu
- X-Submissions-To: telecom@eecs.nwu.edu
- X-Administrivia-To: telecom-request@eecs.nwu.edu
- X-Telecom-Digest: Volume 12, Issue 851, Message 6 of 6
-
- !!!!!!WARNING TO THOSE USING COMBINET ISDN-ETHERNET BRIDGES!!!!!!
-
- There is a severe problem with Combinet's ISDN bridges. In the event
- that the internal table of 1500 ethernet addresses gets filled up, the
- bridge echoes local LAN traffic back onto the LAN. This can cause
- massive problems in a large network. In fact, the Fermilab network
- experienced almost total outage until the problem was traced to the
- Combinet bridge.
-
- If your network has more than 1500 ethernet devices, you are
- susceptible to this problem. A quick fix is to set the aging time to a
- small value (like 60 sec). Combinet is working on a fix.
-
-
- David E. Martin
- National HEPnet Management Phone: +1 708 840-8275
- Fermi National Accelerator Laboratory FAX: +1 708 840-8463
- P.O. Box 500, MS 368; Batavia, IL 60510 USA E-Mail: dem@hep.net
-