Date: Thu, 3 Aug 1995 13:32:47 -0400 (EDT) From: "Michael C. Newell" <mnewell@lupine.nsi.nasa.gov> To: Garrett Wollman <wollman@halloran-eldar.lcs.mit.edu> Cc: aarone@homer.prahran.swin.edu.au, freebsd-questions@freefall.cdrom.com Subject: Re: SLIP routing on internet.... (LONG reply) Message-ID: <Pine.SUN.3.91.950803133158.9223N-100000@lupine.nsi.nasa.gov> In-Reply-To: <9508031729.AA20355@halloran-eldar.lcs.mit.edu>
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On Thu, 3 Aug 1995, Garrett Wollman wrote: > > 2. You can fool around with ARP tables and routes to get this to work (that's > > what I did originally), but it's messy and doesn't scale. What you can do > > is put in an ARP and a route in slip server's tables for each address you're > > going to use on subnet. On target host you'll need arp entries and > > routes for each address you use on ethernet. Again, both slip server and > > target host have to be set up with routing enabled. You wouldn't > > actually subnet - that is, for a class C network number you'd use the > > default mask of 0xffffff00, for class B use 0xffff0000, etc. It works, > > but everything's manual... > > Actually, no it isn't. We had precisely this problem, and the code to > fix it is enabled by adding: > > options ARP_PROXYALL > > to your kernel configuration file. This is very useful when you don't > have control over the main router on your super-subnet. Of course, in > this case, you would still need to subnet your network; all this > technique allows you to do is avoid reconfiguring a hundred machines > over which you may not have any control. In our environment, this > code is used to connect the 18.26.64 and 18.26.128 subsubnets to the > 18.26.0 subsubnet. (That machine is also a multicast router.) Way cool!! Thanks for the pointer... :-) Thanks, Mike +--------------------------------------+------------------------------------+ |Mike Newell | The opinions expressed herein are | |NASA Science Internet Network Systems | my own, and do not necessarily | |Sterling Software, Inc. | reflect those of the NSI program, | |MNewell@nsipo.nasa.gov | Sterling Software, NASA, or anyone | |+1-202-434-8954 | else. | +--------------------------------------+------------------------------------+ | work: http://www.eco.nsi.nasa.gov/~mnewell | | home: http://www.newell.arlington.va.us | +---------------------------------------------------------------------------+
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