From owner-freebsd-net@freebsd.org Mon Jun 3 18:42:02 2019 Return-Path: Delivered-To: freebsd-net@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 3C13E15BA2A0; Mon, 3 Jun 2019 18:42:02 +0000 (UTC) (envelope-from ler@lerctr.org) Received: from thebighonker.lerctr.org (ns-b.lerctr.org [IPv6:2001:470:1f0f:3ad::53:2]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) server-signature RSA-PSS (4096 bits) client-signature RSA-PSS (2048 bits) client-digest SHA256) (Client CN "*.lerctr.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 884958FAAC; Mon, 3 Jun 2019 18:42:01 +0000 (UTC) (envelope-from ler@lerctr.org) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lerctr.org; s=ler2019; h=Message-ID:References:In-Reply-To:Subject:Cc:To:From:Date: Content-Transfer-Encoding:Content-Type:MIME-Version:Sender:Reply-To: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=s8S0L0aDYVRKG74UMZMG0jwowkTPFnmITO6wJqJuq0w=; b=lZ//8WKcenPACAQwa1H8U0M5Tu 4CxoORiVUH0Mdek+oWc+HU3+Jd4mhJkPkiqxWJDh4QHtLeI24WF4twwpQjnJ5pcIQYAzYxgqOrBeZ bGA78MsZ6MyyNsDTh2tEzzGGr0WHYgx0zXdV57Y78NNoAfz273SSVh1FZcOOWEno9FAN8Q8mL9n/3 /KZWm7ZjThTthvEUvFAALNVF2FuvRnHzQk7X2Dv+DqwZ35bW2omDfa4RqPE53y7jZDk1uosooWxWx l8WgWl7a8Ocu46AwjJ7JvHs09XIXCS3axhZzN2NcjDZkvCym9bS21vuwt4aIYVWZtVS2IiNcrghfS HH0Kp/6w==; Received: from thebighonker.lerctr.org ([2001:470:1f0f:3ad:bb:dcff:fe50:d900]:15505 helo=webmail.lerctr.org) by thebighonker.lerctr.org with esmtpsa (TLSv1.3:TLS_AES_256_GCM_SHA384:256) (Exim 4.92 (FreeBSD)) (envelope-from ) id 1hXruC-000Lh0-Kr; Mon, 03 Jun 2019 13:42:00 -0500 Received: from 2600:1700:210:b180:c89b:801e:ddd7:a6bb by webmail.lerctr.org with HTTP (HTTP/1.1 POST); Mon, 03 Jun 2019 13:42:00 -0500 MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 7bit Date: Mon, 03 Jun 2019 13:42:00 -0500 From: Larry Rosenman To: Eugene Grosbein Cc: Freebsd net , owner-freebsd-net@freebsd.org Subject: Re: SNMP/No Bufferspace In-Reply-To: <2ada895d-fbeb-077e-e116-5d9837ce0cb7@grosbein.net> References: <8dba5eaea800356d279eb81d7d8b2a30@lerctr.org> <03051c226dadc9907dcd0839d5025e18@lerctr.org> <2ada895d-fbeb-077e-e116-5d9837ce0cb7@grosbein.net> Message-ID: <5adc5fdf5f3549ba08de17a750204b1c@lerctr.org> X-Sender: ler@lerctr.org User-Agent: Roundcube Webmail/1.3.9 X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 03 Jun 2019 18:42:02 -0000 On 06/03/2019 1:27 pm, Eugene Grosbein wrote: > 04.06.2019 1:15, Larry Rosenman wrote: > >> Name Mtu Network Address Ipkts Ierrs Idrop >> Opkts Oerrs Coll Drop >> bce0 1.5K a4:ba:db:29:66:95 715M 186k 0 >> 533M 0 0 15M > > Something really bad happening at driver level or physical level: > way too many input errors (perhaps, bad CRC) and output drops (due to > busy media?). > > I prefer to max out interface FIFO length while using bce(4) by means > of /boot/loader.conf > when link is heavily utilized: > > # max = 8*255 = 2040 > hw.bce.tx_pages=8 > > Also, check driver-level stats with sysctl dev.bce.0 > If possible, check link partner - managed switch port counters or what > does it have. > Maybe, replace twisted pair cable. Ok, I've removed the bridge (don't need it). Added the tunable and will check it after a few hours. I *REALLY* appreciate the help diagnosing this. (If need be I can replace the cable, but let's see what happens now). -- Larry Rosenman http://www.lerctr.org/~ler Phone: +1 214-642-9640 E-Mail: ler@lerctr.org US Mail: 5708 Sabbia Dr, Round Rock, TX 78665-2106