--- On Thu, 8/20/09, Dmitriy Zamuraev <gigabyte....@gmail.com> wrote:
> From: Dmitriy Zamuraev <gigabyte....@gmail.com> > Subject: Re: em driver input errors > To: alexpalias-bsd...@yahoo.com > Cc: freebsd-net@freebsd.org > Date: Thursday, August 20, 2009, 2:58 PM > Hello Alex, > > > SCHED_ULE, HZ=1000: > I use this too > > > And "netstat -ni" > shows 0 errors on all cards? > Not exactly zero, but for uptime 155 days it seems to be > ok. > bras1 [/usr/home/dm]# netstat -i|grep em > em0 1500 <Link#1> 00:15:17:71:f8:52 2457503820 20175 2096211799 0 0 > em1 1500 <Link#2> 00:15:17:71:f8:52 1084492221 11188 909418060 0 0 > em2 1500 <Link#3> 00:15:17:71:f8:52 4212941427 29566 3500442287 0 0 > em3 1500 <Link#4> 00:15:17:71:f8:52 2143321197 0 1878792786 0 0 Definitely way better than my numbers. Name Mtu Network Address Ipkts Ierrs Opkts Oerrs Coll em0 1500 <Link#1> blah1 11166666892 2776856 13194560132 0 0 em1 1500 <Link#2> blah2 7420822703 462462 6185054971 0 0 em2 1500 <Link#3> blah3 6070962640 167193 5341606634 0 0 em3 1500 <Link#4> blah4 15183452 0 17424318 0 0 # uptime 3:29PM up 8 days, 11:19, 2 users, load averages: 0.69, 0.78, 0.83 > This counters was made by UDP flood, when dummynet can't > process all packets and > swi:net loads one core up to 100%. Yes, the dummynet on > this machine, its bad idea but it's > working stable. (After this incident the switches now > control the flood attack) > NOTE: the MAC is equal because i use if_lagg(4) for this > interfaces for load all cores in CPU Interesting. But I'm seeing this during normal traffic. I can't remember if it was this machine, or the older machine (also with em driver) when I did get a flood of over 90.000 packets/second, and the error rate jumped to around 50.000/second... > >> I think it depends by motherbord, what full > hardware specification are you using? with chips names > > The machine is a Dell PowerEdge 2850. According > to its specs, the chipset is Intel E7520. > > Two 64-bit Xeon processors at 3.20GHz, 4 GB RAM. > For you bandwidth this server must work fine. > Check the UDP/ICMP or other flood on em0 when errors > appear. > What kind of device at the end of em0 copper cable? > If this a manageable switch, and supports tools - try to > investigate what happens when errors appear. It's a ZyXEL managed switch, unfortunately SNMP support doesn't seem to work very well on it. But even before I added this switch (when there was a Cisco Catalyst 3560 at the end of the cable) I was seeing the error bursts. But I will try and see if I detect anything on the switch end. Thanks Alex _______________________________________________ freebsd-net@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-net To unsubscribe, send any mail to "freebsd-net-unsubscr...@freebsd.org"
