From owner-freebsd-net@freebsd.org Sun Jul 21 14:40:17 2019 Return-Path: Delivered-To: freebsd-net@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id B0B77B4FA7 for ; Sun, 21 Jul 2019 14:40:17 +0000 (UTC) (envelope-from ronald@taufilms.com) Received: from mail-ot1-x331.google.com (mail-ot1-x331.google.com [IPv6:2607:f8b0:4864:20::331]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) server-signature RSA-PSS (4096 bits) client-signature RSA-PSS (2048 bits) client-digest SHA256) (Client CN "smtp.gmail.com", Issuer "GTS CA 1O1" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4511582CE9 for ; Sun, 21 Jul 2019 14:40:16 +0000 (UTC) (envelope-from ronald@taufilms.com) Received: by mail-ot1-x331.google.com with SMTP id j11so13300267otp.10 for ; Sun, 21 Jul 2019 07:40:16 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=taufilms-com.20150623.gappssmtp.com; s=20150623; h=mime-version:from:date:message-id:subject:to; bh=fXCwdf85GI3ZD5xZiE7E+cGSkeRRs6/kyiMBEzGPmgc=; b=bFM95RrZnhDnn32r89vNaLAceJ71pM3A4QIDGliTYSiLnIrWxcHir7Sh5MyXdabDul wKmlW9uqMYEyy8dYsiOzpYB70xo74ZVpKtVd0Vebq0gQdhVHdx5jL0b9I96xR3n4fwTR 99gbNMaKX8j2qIOSTIYjj2o8H0E9y5SLUhnzuGspUz18NddjcUXhWnHH4WPyiEzGAzXx zSx9jq/wCPXVfa/kIhgkjCzf2blSz6P3mePVXCoSdkhvDJep9Zn4ghsnDGhOV2QbX1pj WQYICGDNcFwXJ76xXgOOHE9jCHpGrKIH4kTlgNEgnRwG6OiH7IaJ+WHFK8ihkEgbvZvZ Cmmg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:from:date:message-id:subject:to; bh=fXCwdf85GI3ZD5xZiE7E+cGSkeRRs6/kyiMBEzGPmgc=; b=IKoIjbPL5sgYlp0FD5kiyi5c5llMjYNTzaw0R/Vldr0IXDIO6sVf2o9vm7cLQVzfp6 PHWrh4JxL1vOgypGCibZxflJgtDkkl8pSxHUSVzhKegS80rDF9HvTRyVl+pKqM38DlGj k2hxFMZbzf4Q6GfPAFa9c+mDwYB+0CuILK0zM6j05RXMIaqeR4Co0cmlhnWH8c3OXFj5 VsoHTiiTbE5/Jgqn+tWlN/qKiALLka9d36iKAR0l0T0B+mPqUAb+M7oLr/ovYs02N2EN mLMlzrj3LGlHPsXqU3nXbcxJ+q76ps1qGUiS2Cyb9RUTJsb4TE/pMqcdzg/h/5zhlovp cgWQ== X-Gm-Message-State: APjAAAUKzsWb1lRAN5wZqDAgIAeuSFWwNIwUTGXrRQTsA6v/iiUIFoHF CT1bn9jHpUkbKMAX/tTWB6GSNtG4Hu+SCL8dH0o0aEf97Wo= X-Google-Smtp-Source: APXvYqzyiL8OXDhMQDqxQch+l5bI40mzTfZR0HPZdL9qNjNnIsh1RZ0kCBN8jbtjijUOg24VoHh253103qlBQhMMw5Q= X-Received: by 2002:a9d:77d5:: with SMTP id w21mr43128157otl.330.1563720014679; Sun, 21 Jul 2019 07:40:14 -0700 (PDT) MIME-Version: 1.0 From: Ronald Khoo Date: Sun, 21 Jul 2019 22:40:04 +0800 Message-ID: Subject: does qlnxe 100G support DAC splitter? To: freebsd-net@freebsd.org X-Rspamd-Queue-Id: 4511582CE9 X-Spamd-Bar: ----- Authentication-Results: mx1.freebsd.org; dkim=pass header.d=taufilms-com.20150623.gappssmtp.com header.s=20150623 header.b=bFM95RrZ X-Spamd-Result: default: False [-5.00 / 15.00]; ARC_NA(0.00)[]; NEURAL_HAM_MEDIUM(-0.99)[-0.994,0]; R_DKIM_ALLOW(-0.20)[taufilms-com.20150623.gappssmtp.com:s=20150623]; FROM_HAS_DN(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; NEURAL_HAM_LONG(-1.00)[-1.000,0]; MIME_GOOD(-0.10)[multipart/alternative,text/plain]; PREVIOUSLY_DELIVERED(0.00)[freebsd-net@freebsd.org]; TO_DN_NONE(0.00)[]; RCPT_COUNT_ONE(0.00)[1]; RCVD_TLS_LAST(0.00)[]; DKIM_TRACE(0.00)[taufilms-com.20150623.gappssmtp.com:+]; MX_GOOD(-0.01)[alt1.aspmx.l.google.com,aspmx.l.google.com,alt3.aspmx.l.google.com,alt2.aspmx.l.google.com,alt4.aspmx.l.google.com]; DMARC_NA(0.00)[taufilms.com]; RCVD_IN_DNSWL_NONE(0.00)[1.3.3.0.0.0.0.0.0.0.0.0.0.0.0.0.0.2.0.0.4.6.8.4.0.b.8.f.7.0.6.2.list.dnswl.org : 127.0.5.0]; R_SPF_NA(0.00)[]; NEURAL_HAM_SHORT(-0.82)[-0.824,0]; FROM_EQ_ENVFROM(0.00)[]; SUBJECT_ENDS_QUESTION(1.00)[]; MIME_TRACE(0.00)[0:+,1:+]; ASN(0.00)[asn:15169, ipnet:2607:f8b0::/32, country:US]; RCVD_COUNT_TWO(0.00)[2]; IP_SCORE(-2.87)[ip: (-8.75), ipnet: 2607:f8b0::/32(-3.12), asn: 15169(-2.43), country: US(-0.05)] Content-Type: text/plain; charset="UTF-8" X-Content-Filtered-By: Mailman/MimeDel 2.1.29 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: Sun, 21 Jul 2019 14:40:17 -0000 hi freebsd-net, two questions: a. does the qlnxe driver support treating one 100G port as four separate 25G ethernet interfaces via a QSFP28 to 4 x SP25 DAC splitter cable? b. and does it work for one of those to be plugged into a 10G SFP+ switch? trying to figure out an upgrade path from 10G to 25G to 100G on a slot constrained server -- a recent TYAN which only has one proprietary slot for a high speed NIC and I'd like to be able to connect to both a current 10G switch as well as a 100G switch in future (at 25 while migrating and then at 100 once done). the alternative would be to buy a dual 10G NIC initially and then throw it away when going to 100G -- I'm wondering if I can avoid that. thanks! ronald