Date: Mon, 24 Jun 1996 20:04:12 -0400 From: dennis@etinc.com (Dennis) To: Julian Elischer <julian@ref.tfs.com> Cc: hackers@freebsd.org Subject: Re: Frame relay and ATM support Message-ID: <199606250004.UAA17778@etinc.com>
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> >I'm looking into the support needed in FreeBNSD to support >ATM and Frame relay services in a generic manner. > >mostly this would suggest a file equivalent to if_ethersubr.c >but if_framesubr.c or something, that knows how to >associate DLCI's (or VPI's) with >addresses, in the same way that ARP does for ethernet, >with a convenient method for controlling such entries. > >ET inc. (hi Dennis) seem to associate a virtual interface >with each DLCI in their frame realy product, and this actually >makes some sense, but I rather dislike the idea of intefaces that >don't really associate with the hardware they are running on, >and would RATHER do it in such a way that >ifconfig -a would return: > > >fr0: flags=c010<NBMA,MULTICAST> mtu 552 > inet 3.3.3.3 --> 4.4.4.4 netmask 0xff000000 > inet 3.3.3.3 --> 140.5.5.5 netmask 0xffffff00 >note: that this doesn't work at the moment because >the addition of the alias wipes out the original if the local address >is the same.. > >(BTW NBMA == non broadcast multiple access) > >I bring this up because Iwas hired to write a driver for a frame relay >interface for a proprietary project, and want to make sure that as much of >what I write can be brought back to FreeBSD as being of general use. > I like the addition of an NBMA type, except why should it be necessary? It seems that any non-PTP interface with the broadcast flag not set should be NBMA by default. As for the other stuff...beware, things are not always as they appear. Enough said. Dennis PS: Please dont hack up the O/S too much before you're really sure that what you are doing is what you want to do....its such a nice little O/S :-) ---------------------------------------------------------------------------- Emerging Technologies, Inc. http://www.etinc.com Synchronous Communications Cards and Routers For Discriminating Tastes. 56k to T1 and beyond. Frame Relay, PPP, HDLC, and X.25 for BSD/OS, FreeBSD and LINUX
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