From owner-freebsd-questions Thu Aug 3 10:29:17 1995 Return-Path: questions-owner Received: (from majordom@localhost) by freefall.cdrom.com (8.6.11/8.6.6) id KAA06670 for questions-outgoing; Thu, 3 Aug 1995 10:29:17 -0700 Received: from halloran-eldar.lcs.mit.edu (halloran-eldar.lcs.mit.edu [18.26.0.159]) by freefall.cdrom.com (8.6.11/8.6.6) with SMTP id KAA06664 for ; Thu, 3 Aug 1995 10:29:15 -0700 Received: by halloran-eldar.lcs.mit.edu; (5.65/1.1.3.6) id AA20355; Thu, 3 Aug 1995 13:29:08 -0400 Date: Thu, 3 Aug 1995 13:29:08 -0400 From: Garrett Wollman Message-Id: <9508031729.AA20355@halloran-eldar.lcs.mit.edu> To: "Michael C. Newell" Cc: aarone@homer.prahran.swin.edu.au, freebsd-questions@freefall.cdrom.com Subject: Re: SLIP routing on internet.... (LONG reply) In-Reply-To: References: Sender: questions-owner@FreeBSD.org Precedence: bulk < said: > 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.) -GAWollman -- Garrett A. Wollman | Shashish is simple, it's discreet, it's brief. ... wollman@lcs.mit.edu | Shashish is the bonding of hearts in spite of distance. Opinions not those of| It is a bond more powerful than absence. We like people MIT, LCS, ANA, or NSA| who like Shashish. - Claude McKenzie + Florent Vollant