Re: is this FreeBSD problem or HP switch
- In reply to: Zhenlei Huang : "Fwd: is this FreeBSD problem or HP switch"
- Go to: [ bottom of page ] [ top of archives ] [ this month ]
Date: Fri, 14 Oct 2022 11:24:00 UTC
> On Oct 13, 2022, at 10:11 PM, Zhenlei Huang <zlei.huang@gmail.com> wrote: > > Sorry for missing CC > >> Begin forwarded message: >> >> 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> >> >> >> >>> On Oct 14, 2022, at 8:11 AM, Jason Bacon <bacon4000@gmail.com> wrote: >>> >>>> 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. >>> >>> >> >> >> Modern x86 hardware can easily saturate Gigabit network. Probably it is not 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-lost/td-p/6347333 . Although I can not conclude it is the problem of switch, but you can try connection the two FreeBSD box directly with crossover ethernet cable and repeat the test. >> >> Also the statistics reported by switch / OS are extremely useful in production ( when excluding some suspicious objects is not an option ). >> >> Best regards, >> Zhenlei One other thing I stopped using hp switches in favor of fiber store’s fs.com white box switches a few years ago . They are inexpensive and decent enough , and Cisco like . --- Mark Saad | nonesuch@longcount.org >