Article View: comp.protocols.pcnet
Article #65Multicast source addresses
From: Dave P. Wiltzius
Date: Tue, 16 May 1989 17:32
Date: Tue, 16 May 1989 17:32
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I'm currently in a discussion with two vendors (who shall remain nameless); one makes a brouter and another sells a network management software package. The software not only recognizes 802.3 format packets (and not "Ethernet") but also - get this - sets the multicast bit in the MAC level source address. Unfortunately, the brouter notices this and drops the packet. I know at least one bridge that will *learn* the multicast address (which could result in defeating that multicast address - I didn't check). I would like the brouter to be a bit more lenient (i.e. forward the packet as appropriate but don't learn the multicast source address) and the software vendor to fix the code (let "Blue Book" Ethernet - type field in bytes 12-13 be supported, not just 802.3 - length in bytes 12-13 . . .) and don't set that multicast bit in the source address. Could people send me the names of LAN software that they have found that puts a multicast/broadcast in the MAC level source address? I know of two, and one was just recently fixed. Thanks much. Dave Wiltzius (wiltzius@lll-lcc.llnl.gov) Lawrence Livermore Nat'l Lab
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!apple!well!lll-lcc!wiltzius From: wiltzius@lll-lcc.UUCP (Dave P. Wiltzius) Newsgroups: comp.protocols.pcnet,comp.protocols.tcp-ip,comp.dcom.lans Subject: Multicast source addresses Message-ID: <2480@lll-lcc.UUCP> Date: 16 May 89 17:32:25 GMT Reply-To: wiltzmus@lll-crg.UUCP (Dave P. Wiltzius) Followup-To: comp.protocols.pcnet Organization: CRG, Lawrence Livermore Labs Lines: 26