From owner-freebsd-net Mon Aug 23 11:43:31 1999 Delivered-To: freebsd-net@freebsd.org Received: from mail4.microsoft.com (mail4.microsoft.com [131.107.3.122]) by hub.freebsd.org (Postfix) with SMTP id E58B514FB4 for ; Mon, 23 Aug 1999 11:43:25 -0700 (PDT) (envelope-from gchung@microsoft.com) Received: from 157.54.9.103 by mail4.microsoft.com (InterScan E-Mail VirusWall NT); Mon, 23 Aug 1999 11:42:13 -0700 (Pacific Daylight Time) Received: by INET-IMC-04 with Internet Mail Service (5.5.2524.0) id ; Mon, 23 Aug 1999 11:42:13 -0700 Message-ID: From: George Chung To: "'freebsd-net@freebsd.org'" Subject: 3 newbie Q's on routes for multicast addresses Date: Mon, 23 Aug 1999 11:42:11 -0700 X-Mailer: Internet Mail Service (5.5.2524.0) Sender: owner-freebsd-net@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org Platform: FreeBSD 3.2 1. On a private network with no routers, I have to manually add a route for multicast addresses in order to send UDP packets to that address. I don't have to do this on a "normal" network (InterNIC assigned network address, properly connected to Internet). What protocol is running on the latter network that allows to FreeBSD boxes to automatically set up routes for multicast addresses? 2. When I manually add a route for a multicast address, I use the following command: route add -net 225.0.0.1 -netmask 255.0.0.0 -interface 10.100.100.100 Although this works, I'm not so sure about the semantics of the netmask. It seems that a netmask of 224.0.0.0 is also legit, but I wouldn't know how to explain the difference between using one over the other. What does a netmask for a class D address really mean? 3. Can someone point out the man pages for automatically adding this route at boot up time? Thanks very much, George Chung To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message