Date: Fri, 14 Oct 2022 07:24:00 -0400 From: Mark Saad <nonesuch@longcount.org> To: freebsd-hackers@freebsd.org Subject: Re: is this FreeBSD problem or HP switch Message-ID: <D254C67E-0289-40AB-8329-FABE46630161@longcount.org> In-Reply-To: <F3AB6786-920B-4E63-9268-37F097974BC2@gmail.com> References: <F3AB6786-920B-4E63-9268-37F097974BC2@gmail.com>
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--Apple-Mail-C7629555-65B0-4DCE-906B-F530D6D37931 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable > On Oct 13, 2022, at 10:11 PM, Zhenlei Huang <zlei.huang@gmail.com> wrote: >=20 > =EF=BB=BFSorry for missing CC >=20 >> Begin forwarded message: >>=20 >> From: Zhenlei Huang <zlei.huang@gmail.com> >> Subject: Re: is this FreeBSD problem or HP switch >> Date: October 14, 2022 at 10:08:13 AM GMT+8 >> To: Jason Bacon <bacon4000@gmail.com> >>=20 >>=20 >>=20 >>> On Oct 14, 2022, at 8:11 AM, Jason Bacon <bacon4000@gmail.com> wrote: >>>=20 >>>> 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 100Mbi= t/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) >>>=20 >>> I saw an issue some years ago where one of my FreeBSD servers was overwh= elming a Cisco switch while pushing files out to HTCondor nodes, causing it t= o drop packets. Our networks guru confirmed the problem by monitoring the s= witch. Since no handshaking was possible, I worked around it by throttling t= he interface on the FreeBSD box, using ipfw if I recall correctly. >>>=20 >>> --=20 >>> Life is a game. Play hard. Play fair. Have fun. >>>=20 >>>=20 >>=20 >>=20 >> Modern x86 hardware can easily saturate Gigabit network. Probably it is n= ot the issue of the box, or the OS ( FreeBSD in the context ). >> There's an old post about ICMP packet drops on the HPE community, https:/= /community.hpe.com/t5/aruba-provision-based/hp-procuvre-2530-icmp-packet-los= t/td-p/6347333 . Although I can not conclude it is the problem of switch, bu= t you can try connection the two FreeBSD box directly with crossover etherne= t cable and repeat the test. >>=20 >> Also the statistics reported by switch / OS are extremely useful in produ= ction ( when excluding some suspicious objects is not an option ). >>=20 >> Best regards, >> Zhenlei One other thing I stopped using hp switches in favor of fiber store=E2=80=99= s fs.com white box switches a few years ago . They are inexpensive and dece= nt enough , and Cisco like .=20 --- Mark Saad | nonesuch@longcount.org >=20 --Apple-Mail-C7629555-65B0-4DCE-906B-F530D6D37931 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable <html><head><meta http-equiv=3D"content-type" content=3D"text/html; charset=3D= utf-8"></head><body dir=3D"auto"><br><br><div dir=3D"ltr"><blockquote type=3D= "cite">On Oct 13, 2022, at 10:11 PM, Zhenlei Huang <zlei.huang@gmail.com&= gt; wrote:<br><br></blockquote></div><blockquote type=3D"cite"><div dir=3D"l= tr">=EF=BB=BF<meta http-equiv=3D"Content-Type" content=3D"text/html; charset= =3Dus-ascii">Sorry for missing CC<br class=3D""><div><br class=3D""><blockqu= ote type=3D"cite" class=3D""><div class=3D"">Begin forwarded message:</div><= br class=3D"Apple-interchange-newline"><div style=3D"margin-top: 0px; margin= -right: 0px; margin-bottom: 0px; margin-left: 0px;" class=3D""><span style=3D= "font-family: -webkit-system-font, Helvetica Neue, Helvetica, sans-serif; co= lor:rgba(0, 0, 0, 1.0);" class=3D""><b class=3D"">From: </b></span><span sty= le=3D"font-family: -webkit-system-font, Helvetica Neue, Helvetica, sans-seri= f;" class=3D"">Zhenlei Huang <<a href=3D"mailto:zlei.huang@gmail.com" cla= ss=3D"">zlei.huang@gmail.com</a>><br class=3D""></span></div><div style=3D= "margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px;" c= lass=3D""><span style=3D"font-family: -webkit-system-font, Helvetica Neue, H= elvetica, sans-serif; color:rgba(0, 0, 0, 1.0);" class=3D""><b class=3D"">Su= bject: </b></span><span style=3D"font-family: -webkit-system-font, Helvetica= Neue, Helvetica, sans-serif;" class=3D""><b class=3D"">Re: is this FreeBSD p= roblem or HP switch</b><br class=3D""></span></div><div style=3D"margin-top:= 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px;" class=3D""><= span style=3D"font-family: -webkit-system-font, Helvetica Neue, Helvetica, s= ans-serif; color:rgba(0, 0, 0, 1.0);" class=3D""><b class=3D"">Date: </b></s= pan><span style=3D"font-family: -webkit-system-font, Helvetica Neue, Helveti= ca, sans-serif;" class=3D"">October 14, 2022 at 10:08:13 AM GMT+8<br class=3D= ""></span></div><div style=3D"margin-top: 0px; margin-right: 0px; margin-bot= tom: 0px; margin-left: 0px;" class=3D""><span style=3D"font-family: -webkit-= system-font, Helvetica Neue, Helvetica, sans-serif; color:rgba(0, 0, 0, 1.0)= ;" class=3D""><b class=3D"">To: </b></span><span style=3D"font-family: -webk= it-system-font, Helvetica Neue, Helvetica, sans-serif;" class=3D"">Jason Bac= on <<a href=3D"mailto:bacon4000@gmail.com" class=3D"">bacon4000@gmail.com= </a>><br class=3D""></span></div><br class=3D""><div class=3D""><meta htt= p-equiv=3D"Content-Type" content=3D"text/html; charset=3Dus-ascii" class=3D"= "><div style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; line-break:= after-white-space;" class=3D""><br class=3D""><div class=3D""><br class=3D"= "><blockquote type=3D"cite" class=3D""><div class=3D"">On Oct 14, 2022, at 8= :11 AM, Jason Bacon <<a href=3D"mailto:bacon4000@gmail.com" class=3D"">ba= con4000@gmail.com</a>> wrote:</div><br class=3D"Apple-interchange-newline= "><div class=3D""><div class=3D"">On 10/13/22 17:48, Wojciech Puchar wrote:<= br class=3D""><blockquote type=3D"cite" class=3D"">i have HP-2530-24G switch= in home and 3 VLANs.<br class=3D"">there was no traffic on 2 of them, one v= lan have full bandwitch traffic from computer A to computer B - at 1000Mbit/= s<br class=3D"">At this time ping from computer C to computer A (computer C h= ave 100Mbit/s card) was random between 1 and 1000ms.<br class=3D"">Just limi= ting artifically speed to 950Mbit/s solved the problem.<br class=3D"">Is thi= s because switch behaves that way or can it be a FreeBSD problem (all comput= ers runs FreeBSD)<br class=3D""></blockquote><br class=3D"">I saw an issue s= ome years ago where one of my FreeBSD servers was overwhelming a Cisco switc= h while pushing files out to HTCondor nodes, causing it to drop packets. &nb= sp;Our networks guru confirmed the problem by monitoring the switch. S= ince no handshaking was possible, I worked around it by throttling the inter= face on the FreeBSD box, using ipfw if I recall correctly.<br class=3D""><br= class=3D"">-- <br class=3D"">Life is a game. Play hard. Play fa= ir. Have fun.<br class=3D""><br class=3D""><br class=3D""></div></div>= </blockquote></div><div class=3D""><br class=3D""></div><div class=3D"">Mode= rn x86 hardware can easily saturate Gigabit network. Probably it is not the i= ssue of the box, or the OS ( FreeBSD in the context ).</div><div class=3D"">= There's an old post about ICMP packet drops on the HPE community, <a hr= ef=3D"https://community.hpe.com/t5/aruba-provision-based/hp-procuvre-2530-ic= mp-packet-lost/td-p/6347333" class=3D"">https://community.hpe.com/t5/aruba-p= rovision-based/hp-procuvre-2530-icmp-packet-lost/td-p/6347333</a> . Alt= hough I can not conclude it is the problem of switch, but you can try connec= tion the two FreeBSD box directly with crossover ethernet cable and repeat t= he test.</div><div class=3D""><br class=3D""></div><div class=3D"">Also the s= tatistics reported by switch / OS are extremely useful in production ( when e= xcluding some suspicious objects is not an option ).</div><div class=3D""><b= r class=3D""></div><div class=3D"">Best regards,</div><div class=3D"">Zhenle= i</div></div></div></blockquote></div></div></blockquote><div><br></div><div= >One other thing I stopped using hp switches in favor of fiber store=E2=80=99= s fs.com white box switches a few years ago . They are inexpensive and= decent enough , and Cisco like . </div><div><br></div><div><br></div>-= --<div>Mark Saad | nonesuch@longcount.org</div><blockquote type=3D"cite"><di= v dir=3D"ltr"><br class=3D""></div></blockquote></body></html>= --Apple-Mail-C7629555-65B0-4DCE-906B-F530D6D37931--
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