From owner-freebsd-net Tue Jun 27 16:20:54 2000 Delivered-To: freebsd-net@freebsd.org Received: from mail.numachi.com (numachi.numachi.com [198.175.254.2]) by hub.freebsd.org (Postfix) with SMTP id 4814737BFBB for ; Tue, 27 Jun 2000 16:20:49 -0700 (PDT) (envelope-from reichert@numachi.com) Received: (qmail 6184 invoked by uid 1001); 27 Jun 2000 23:20:46 -0000 Date: Tue, 27 Jun 2000 19:20:46 -0400 From: Brian Reichert To: freebsd-net@freebsd.org Subject: Did IP aliasing change after 2.x? Message-ID: <20000627192045.J1800@numachi.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Mailer: Mutt 1.0pre4i Sender: owner-freebsd-net@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org I must be missing something, so please bear with me. I have two servers running. 198.175.254.7 is running 2.2.7-RELEASE. 198.175.254.4 is running 4.0-RELEASE. In each case, the IP is an alias on the NIC. From within my net, I can ping each of these name servers. From outside of my net, I can only ping 198.175.254.7, the 'old' box. I can get to their primary IP addresses just fine. There is no packet filtering at play here. On each of the newer box, when I dump ping traffic with tcpdump: # tcpdump -n host 198.175.254.4 tcpdump: listening on dc0 19:05:21.437187 208.176.83.163 > 198.175.254.4: icmp: echo request 19:05:22.434743 208.176.83.163 > 198.175.254.4: icmp: echo request 19:05:23.431832 208.176.83.163 > 198.175.254.4: icmp: echo request That network segment is getting packets destined for 198.175.254.4, but the card never generates the 'echo reply' packets. The 2.2.7-RELEASE box: # ifconfig ed1 ed1: flags=8843 mtu 1500 inet 198.175.254.2 netmask 0xffffff00 broadcast 198.175.254.255 inet 198.175.254.7 netmask 0xffffffff broadcast 198.175.254.7 ether 00:40:05:4c:5c:e0 The 4.0-RELEASE box: # ifconfig dc0 dc0: flags=8843 mtu 1500 inet 198.175.254.6 netmask 0xffffff00 broadcast 198.175.254.255 inet6 fe80::220:78ff:fee1:4ae1%dc0 prefixlen 64 scopeid 0x1 inet 198.175.254.4 netmask 0xffffffff broadcast 198.175.254.4 ether 00:20:78:e1:4a:e1 media: autoselect (10baseT/UTP) status: active supported media: autoselect 100baseTX 100baseTX 10baseT/UTP 10baseT/UTP 100baseTX none The mailing list archives mentioned affixing the alias to lo0, rather than the NIC; I tried that, to no effect. There was nothing on the errata page. Any ideas on why I might be seeing different results here? -- Brian 'you Bastard' Reichert reichert@numachi.com 37 Crystal Ave. #303 Daytime number: (603) 434-6842 Derry NH 03038-1713 USA Intel architecture: the left-hand path To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message