Date: Fri, 13 Nov 1998 09:05:26 +0100 From: Jesper Skriver <jesper@skriver.dk> To: Leif Neland <root@swimsuit.internet.dk> Cc: freebsd-isp@FreeBSD.ORG Subject: Re: two routers back to back: Do they need real ip-adresses? Message-ID: <19981113090526.A10967@skriver.dk> In-Reply-To: <Pine.BSF.4.05.9811130116370.580-100000@gina.swimsuit.internet.dk>; from Leif Neland on Fri, Nov 13, 1998 at 01:29:52AM %2B0100 References: <Pine.BSF.4.05.9811130116370.580-100000@gina.swimsuit.internet.dk>
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On Fri, Nov 13, 1998 at 01:29:52AM +0100, Leif Neland wrote: > We had to put in a cisco 1605 router (with 2 ethernet ports) between our > net and our isp supplying our backbone connection. > > The "ethernet", which is only a crossed 10BT cable between the two > routers, does it need real ip adresses? > > > +-----------+ +-----------+ +----+ ----- > --our net---+ E0 E1 +------+ E0 S0 |-----+ | \ > 3C's | 1605 | | 100x | | +---- > +-----------+ ^ +-----------+ +----+ > | > Can I use 192.168.1.0-adresses here? > Or even unnumbered ip? > > Our uplink isp wants us to subnet one of our C's in a /30, is this really > nessecary? You can't use unnumbered on broadcast media aka ethernet, so you need to assign addresses to the interfaces, but these can be RFC1918 addresses, that is if your ISP is willing to accept this. /Jesper -- Jesper Skriver (JS4261-RIPE), Network manager Tele Danmark DataNet, IP section (AS3292) One Unix to rule them all, One Resolver to find them, One IP to bring them all and in the zone to bind them. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-isp" in the body of the message
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