From owner-freebsd-net@FreeBSD.ORG Fri Oct 24 12:28:30 2003 Return-Path: Delivered-To: freebsd-net@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id DADDE16A4B3 for ; Fri, 24 Oct 2003 12:28:30 -0700 (PDT) Received: from manganese.bos.dyndns.org (manganese.bos.dyndns.org [63.208.196.3]) by mx1.FreeBSD.org (Postfix) with ESMTP id EF96243FD7 for ; Fri, 24 Oct 2003 12:28:29 -0700 (PDT) (envelope-from twilde@dyndns.org) Received: from manganese.bos.dyndns.org (twilde@localhost [127.0.0.1]) h9OJSSfx043237 for ; Fri, 24 Oct 2003 15:28:28 -0400 (EDT) (envelope-from twilde@dyndns.org) Received: from localhost (twilde@localhost)h9OJSSvw043234 for ; Fri, 24 Oct 2003 15:28:28 -0400 (EDT) X-Authentication-Warning: manganese.bos.dyndns.org: twilde owned process doing -bs Date: Fri, 24 Oct 2003 15:28:28 -0400 (EDT) From: Tim Wilde X-X-Sender: twilde@manganese.bos.dyndns.org To: net@freebsd.org Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-Spam-Status: -5.8 () BAYES_01,USER_AGENT_PINE,X_AUTH_WARNING X-Scanned-By: MIMEDefang 2.36 Subject: Bridging Packet Loss X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 24 Oct 2003 19:28:31 -0000 I'm experiencing 2-3% packet loss in a bridging configuration on a FreeBSD 4.8-p13 box, Intel Celeron 700MHz with 256MB RAM, dual fxp NICs (it's a Dell Poweredge 350). I'm running ipfw2 rules on the bridge, but have ruled them out as the cause of the loss by clearing them out - the loss still occurs. We're seeing around 5Mbps of traffic bidirectionally across the server. We were running this exact same packet load, with the same server and the same firewall rules, as a router, without this loss. The packet loss is observed pinging the IP on the firewall from the inside network, as well as pinging across the bridge. Output from ifconfig and relevant sysctls is below. Anyone have any suggestions as to what might be causing this or how we could rectify it? Both ends of both connections are locked down to 100Mbps full-duplex (server and switches). Thanks! fxp0: flags=8943 mtu 1500 inet6 fe80::202:b3ff:fe86:8afc%fxp0 prefixlen 64 scopeid 0x1 ether 00:02:b3:86:8a:fc media: Ethernet 100baseTX status: active fxp1: flags=8943 mtu 1500 inet6 fe80::202:b3ff:fe86:8afd%fxp1 prefixlen 64 scopeid 0x2 inet 63.208.196.57 netmask 0xffffff80 broadcast 63.208.196.127 ether 00:02:b3:86:8a:fd media: Ethernet 100baseTX status: active net.link.ether.inet.prune_intvl: 300 net.link.ether.inet.max_age: 1200 net.link.ether.inet.host_down_time: 20 net.link.ether.inet.maxtries: 5 net.link.ether.inet.useloopback: 1 net.link.ether.inet.proxyall: 0 net.link.ether.inet.log_arp_wrong_iface: 1 net.link.ether.bridge_cfg: fxp0,fxp1 net.link.ether.bridge: 1 net.link.ether.bridge_ipfw: 1 net.link.ether.bridge_ipf: 0 net.link.ether.bridge_ipfw_drop: 0 net.link.ether.bridge_ipfw_collisions: 0 net.link.ether.verbose: 0 net.link.ether.bdg_split_pkts: 0 net.link.ether.bdg_thru: 352262925 net.link.ether.bdg_copied: 0 net.link.ether.bdg_copy: 0 net.link.ether.bdg_predict: 481965741 net.link.ether.bdg_fw_avg: 0 net.link.ether.bdg_fw_ticks: 0 net.link.ether.bdg_fw_count: 0 net.link.ether.ipfw: 0 If anyone needs anything else to diagnose, let me know. Thanks. Tim Wilde -- Tim Wilde twilde@dyndns.org Systems Administrator Dynamic DNS Network Services http://www.dyndns.org/