Date: Mon, 25 May 2015 15:25:11 +0800 From: Julian Elischer <julian@freebsd.org> To: Cs <bimmer@field.hu>, freebsd-performance@freebsd.org Subject: Re: FreeBSD 10.1-REL - network unaccessible after high traffic Message-ID: <5562CE57.6070000@freebsd.org> In-Reply-To: <5562C718.6040005@field.hu> References: <5561EA73.20005@field.hu> <55628963.9080805@freebsd.org> <5562C27A.5000604@field.hu> <5562C718.6040005@field.hu>
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On 5/25/15 2:54 PM, Cs wrote: > Hi All, > > Julian gave me an idea to increase MTU to 9000 but I'm not sure if > it helps. Anyway I increased it on both servers. > @Julian: the loader.conf and sysctl tuning parameters are ok? better mailing list might be -net. I don't see any obvious problems. It may be worth trying to turn off all the advanced features like TSO etc. > > Regards, > Csaba > > 2015.05.25. 8:34 keltezéssel, Cs írta: >> Hi Julian, >> >> Yes, the problem was the same when I used cross link for two years. >> The duplex settings are identical on both servers. >> >> Server A: >> em1: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 >> mtu 1500 >> options=4219b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,TSO4,WOL_MAGIC,VLAN_HWTSO> >> >> ether 00:25:90:24:52:66 >> inet x.x.x.x netmask 0xfffffe00 broadcast x.x.x.x >> nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL> >> media: Ethernet autoselect (1000baseT <full-duplex>) >> status: active >> >> Server B: >> em0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 >> mtu 1500 >> options=4219b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,TSO4,WOL_MAGIC,VLAN_HWTSO> >> >> ether 00:30:48:dd:fe:3e >> inet x.x.x.x netmask 0xfffffe00 broadcast x.x.x.x >> nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL> >> media: Ethernet autoselect (1000baseT <full-duplex>) >> status: active >> >> I always suspected the 'em' driver and thought "it will be fixed in >> the next release", but after ~3 years I think I need to dig deep to >> find the root cause. >> >> Regards, >> Csaba >> >> 2015.05.25. 4:30 keltezéssel, Julian Elischer írta: >>> On 5/24/15 11:12 PM, Cs wrote: >>>> Hi all, >>>> >>>> I have two FreeBSd 10.1-RELEASE servers connected to each other. >>>> They were connected via cross link, but they are connected to a >>>> cisco switch now. When transferring huge files (50-500GB backup >>>> files) via Gigabit (it is important!) the network randomly dies. >>>> The backup runs every day/week and sometimes the connection is ok >>>> for months sometimes it happens twice a week. When the network >>>> dies I can log in to the server via IPMI and use the console >>>> everything is OK, but can't send anything out on the network. >>>> ifconfig em0 down/up doesn't help nor netif restart. The problem >>>> never occured when I used 100Mbit connection between them, but it >>>> was 3com NIC (xl), gigabit adapter is Intel (em0). When I limit >>>> the transfer rate (rsync bandwith limit or ipfw pipe) the problem >>>> is much more rare. >>> >>> did you have the problem with no switch? >>> is he duplex setting correct? >>> >>>> >>>> I tried to set these tuning parameters on both servers with >>>> different buffer size but nothing helped: >>>> >>>> # cat /etc/sysctl.conf >>>> security.bsd.see_other_uids=0 >>>> net.inet.tcp.recvspace=512000 >>>> net.route.netisr_maxqlen=2048 >>>> kern.ipc.nmbclusters=1310720 >>>> net.inet.tcp.sendbuf_max=16777216 >>>> net.inet.tcp.recvbuf_max=16777216 >>>> kern.ipc.soacceptqueue=32768 >>>> >>>> # cat /boot/loader.conf >>>> geom_mirror_load="YES" # RAID1 disk driver (see gmirror(8)) >>>> ipfw_load="YES" >>>> net.inet.ip.fw.default_to_accept=1 >>>> kern.maxusers=4096 >>>> accf_data_load="YES" >>>> >>>> Any ideas? Thanks guys! >>>> _______________________________________________ >>>> freebsd-performance@freebsd.org mailing list >>>> http://lists.freebsd.org/mailman/listinfo/freebsd-performance >>>> To unsubscribe, send any mail to >>>> "freebsd-performance-unsubscribe@freebsd.org" >>>> >>> >>> _______________________________________________ >>> freebsd-performance@freebsd.org mailing list >>> http://lists.freebsd.org/mailman/listinfo/freebsd-performance >>> To unsubscribe, send any mail to >>> "freebsd-performance-unsubscribe@freebsd.org" >> >> _______________________________________________ >> freebsd-performance@freebsd.org mailing list >> http://lists.freebsd.org/mailman/listinfo/freebsd-performance >> To unsubscribe, send any mail to >> "freebsd-performance-unsubscribe@freebsd.org" > > _______________________________________________ > freebsd-performance@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-performance > To unsubscribe, send any mail to > "freebsd-performance-unsubscribe@freebsd.org" > > >
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