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[184.58.230.200]) by smtp.gmail.com with ESMTPSA id s21-20020a05620a29d500b006bb78d095c5sm1088761qkp.79.2022.10.13.17.10.51 for (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 13 Oct 2022 17:10:52 -0700 (PDT) Message-ID: Date: Thu, 13 Oct 2022 19:11:06 -0500 List-Id: Technical discussions relating to FreeBSD List-Archive: https://lists.freebsd.org/archives/freebsd-hackers List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-hackers@freebsd.org MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:102.0) Gecko/20100101 Thunderbird/102.3.2 Subject: Re: is this FreeBSD problem or HP switch Content-Language: en-US To: freebsd-hackers@freebsd.org References: <586238fe-a9f-94b5-65b6-bc505551e9fb@puchar.net> From: Jason Bacon In-Reply-To: <586238fe-a9f-94b5-65b6-bc505551e9fb@puchar.net> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: 4MpRcZ0K03z4L9K X-Spamd-Bar: -- Authentication-Results: mx1.freebsd.org; dkim=pass header.d=gmail.com header.s=20210112 header.b=Qps9UaAm; dmarc=pass (policy=none) header.from=gmail.com; spf=pass (mx1.freebsd.org: domain of bacon4000@gmail.com designates 2607:f8b0:4864:20::831 as permitted sender) smtp.mailfrom=bacon4000@gmail.com X-Spamd-Result: default: False [-2.09 / 15.00]; NEURAL_HAM_MEDIUM(-1.00)[-1.000]; NEURAL_HAM_LONG(-1.00)[-0.999]; NEURAL_SPAM_SHORT(0.91)[0.914]; DMARC_POLICY_ALLOW(-0.50)[gmail.com,none]; R_DKIM_ALLOW(-0.20)[gmail.com:s=20210112]; R_SPF_ALLOW(-0.20)[+ip6:2607:f8b0:4000::/36]; MIME_GOOD(-0.10)[text/plain]; FROM_HAS_DN(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; PREVIOUSLY_DELIVERED(0.00)[freebsd-hackers@freebsd.org]; ARC_NA(0.00)[]; RCPT_COUNT_ONE(0.00)[1]; DWL_DNSWL_NONE(0.00)[gmail.com:dkim]; MID_RHS_MATCH_FROM(0.00)[]; RCVD_TLS_LAST(0.00)[]; RCVD_COUNT_THREE(0.00)[3]; TO_DN_NONE(0.00)[]; FREEMAIL_FROM(0.00)[gmail.com]; RCVD_IN_DNSWL_NONE(0.00)[2607:f8b0:4864:20::831:from]; DKIM_TRACE(0.00)[gmail.com:+]; MIME_TRACE(0.00)[0:+]; FROM_EQ_ENVFROM(0.00)[]; ASN(0.00)[asn:15169, ipnet:2607:f8b0::/32, country:US]; FREEMAIL_ENVFROM(0.00)[gmail.com]; MLMMJ_DEST(0.00)[freebsd-hackers@freebsd.org] X-ThisMailContainsUnwantedMimeParts: N On 10/13/22 17:48, Wojciech Puchar wrote: > i have HP-2530-24G switch in home and 3 VLANs. > there was no traffic on 2 of them, one vlan have full bandwitch traffic > from computer A to computer B - at 1000Mbit/s > At this time ping from computer C to computer A (computer C have > 100Mbit/s card) was random between 1 and 1000ms. > > Just limiting artifically speed to 950Mbit/s solved the problem. > > Is this because switch behaves that way or can it be a FreeBSD problem > (all computers runs FreeBSD) > > > I saw an issue some years ago where one of my FreeBSD servers was overwhelming a Cisco switch while pushing files out to HTCondor nodes, causing it to drop packets. Our networks guru confirmed the problem by monitoring the switch. Since no handshaking was possible, I worked around it by throttling the interface on the FreeBSD box, using ipfw if I recall correctly. -- Life is a game. Play hard. Play fair. Have fun.