From owner-freebsd-isp Sun Oct 25 15:16:35 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id PAA27011 for freebsd-isp-outgoing; Sun, 25 Oct 1998 15:16:35 -0800 (PST) (envelope-from owner-freebsd-isp@FreeBSD.ORG) Received: from liquid.tpb.net (drum-n-bass.party-animals.com [194.134.94.34]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id PAA27002 for ; Sun, 25 Oct 1998 15:16:32 -0800 (PST) (envelope-from niels@bakker.net) Received: from localhost (niels@localhost) by liquid.tpb.net (8.9.1a/8.8.8/Debian/GNU) with SMTP id AAA13531 for ; Mon, 26 Oct 1998 00:15:38 +0100 Date: Mon, 26 Oct 1998 00:15:38 +0100 (CET) From: N To: freebsd-isp@FreeBSD.ORG Subject: Re: route changes erratically (routed) In-Reply-To: <19981025131724.A19988@worldgate.com> Message-ID: <981026001156.13499A-100000@liquid.tpb.net> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-isp@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org Quoth Greg Skafte: > except that the portmaster is supposed to advertise /29 /30 ... etc. > if that is the valid subnet of a current session. If you don't want to > see routes other than the /28 you need to have the portmaster agregate > the routes to the desired netmask .... Livingston^WLucent PortMasters can't do that. There are two ways to avoid polluting your IGP (be it RIPv2 or OSPF based): either set the pool size to 32 or 64 (depending on the amount of E1/T1's into your PM3) and start the assigned pool at the same boundary, or filter IGP announcements later on, possibly utilising route summaries. > this is the nature of vlsm routing ... you can have routes for most > of any cidr block and still redirect smaller pieces to other places. PM's suck in this regard, they can generate a handful of routes for a block even if they only miss one IP address in it to make it to the next ^2 natural boundary, and there's no way to tell them to aggregrate it anyway. -- Niels. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-isp" in the body of the message