Date: Thu, 17 Apr 2014 22:38:27 +0200 From: Andrea Venturoli <ml@netfence.it> To: freebsd-net@freebsd.org Subject: Network troubles after 8.3 -> 8.4 upgrade Message-ID: <53503BC3.6040806@netfence.it>
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Hello. Three days ago I upgraded an amd64 8.3 box to the latest 8.4. Since then the outside network is misbehaving: large mails are not sended (although small ones do), svn operations will work for a while, then come to a sudden stop, etc... Perhaps the most evident test is "wget"ting a big file: it will download some chunk, halt; restart after a while and download another chunk; lose the connection once again, then restart and so on. I remember a couple of similar experiences in the past, from which I got out by disabling TSO; however those box had fxp cards, while this has an em. In any case disabling TSO did not help. This is the relevant part of rc.conf: > cloned_interfaces="lagg0 vlan1 vlan2 vlan3 carp0 carp1 carp3 carp4 carp6 carp7 carp9 carp10" > ifconfig_igb0="up" > ifconfig_igb1="up" > ifconfig_lagg0="laggproto lacp laggport igb0 laggport igb1 192.168.101.4 netmask 255.255.255.0" > ifconfig_lagg0_alias0="inet 192.168.101.101 netmask 0xffffffff" > ifconfig_carp0="vhid 1 advskew 100 pass xxxxxxx 192.168.101.10" > ifconfig_carp1="vhid 2 pass xxxxxxxx 192.168.101.10" > ifconfig_em0="up" > ifconfig_vlan1="inet 81.174.30.11 netmask 255.255.255.248 vlan 4 vlandev em0" > ifconfig_vlan2="inet 83.211.188.186 netmask 255.255.255.248 vlan 2 vlandev em0" > ifconfig_vlan3="inet 192.168.2.202 netmask 255.255.255.0 vlan 3 vlandev em0" > ifconfig_carp3="vhid 4 advskew 100 pass xxxx 81.174.30.12" > ifconfig_carp4="vhid 5 pass xxxxxxx 81.174.30.12" > ifconfig_carp6="vhid 7 advskew 100 pass xxxxxx 83.211.188.187" > ifconfig_carp7="vhid 8 pass xxxxxxxxxxx 83.211.188.187" > ifconfig_carp9="vhid 10 advskew 100 pass xxxxxxxx 192.168.2.203" > ifconfig_carp10="vhid 11 pass xxxxxxxx 192.168.2.203" > ifconfig_lo0_alias0="inet 127.0.0.2 netmask 0xffffffff" > ifconfig_lo0_alias1="inet 127.0.0.3 netmask 0xffffffff" > ifconfig_lo0_alias2="inet 127.0.0.4 netmask 0xffffffff" As you can see the setup is quite complicated, but worked like a charm until the upgrade; actually the internal net (igb+lagg+carp) still does, so this is what points me toward em0, where I cannot seem to get any kind of stability. The card is > em0@pci0:6:0:0: class=0x020000 card=0x10828086 chip=0x107d8086 rev=0x06 hdr=0x00 > vendor = 'Intel Corporation' > device = 'PRO/1000 PT' > class = network > subclass = ethernet I tried disabling TSO, RXCSUM, TXCSUM, VLANHWTAG, VLANHWCSUM, VLANHWTSO... I tried putting the card into 10baseT/UTP <half-duplex> mode... I tried sysctl net.inet.tcp.tso=0... None helped. Maybe I'm barking up the wrong tree, but nothing is in the logs to help... Nor did Google or wading through bug reports. Now I could restore the dumps I made before upgrading to 8.4 (but I'd really like to avoid this), try to upgrade even further to 9.2 (although this will be a lot of work and I'm not looking forward to it as a shot in the dark), drop in another NIC... What I'd really like, however, is some insight. Is this a known problem of some sort? Is this card or this driver known to be broken? Is there any way I could get some debugging info? Any hint is appreciated (and I need it badly :( !!!). bye & Thanks av.
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