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!
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