TCP Reassembly Issues

[Stefan Bethke]

Am 25.11.2011 um 00:35 schrieb Adrian Chadd:

> Have you tried disabling the tcp offload features of your NIC?


I'm using my em0 as a VLAN trunk, and I'm under the impression that that disables all the hardware assists in the controller. Also, the LAN vlan is bridged via OpenVPN and tap, making the whole bunch promiscous, which I believe also forces off the acceleration.

em0: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> metric 0 mtu 1500
	options=219b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,TSO4,WOL_MAGIC>
	ether 00:1c:c0:7d:8c:50
	inet6 fe80::21c:c0ff:fe7d:8c50%em0 prefixlen 64 scopeid 0x1 
	nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
	media: Ethernet autoselect (1000baseT <full-duplex>)
	status: active
bridge0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
	ether 02:00:00:00:00:01
	inet6 2001:470:1f0b:1064::1 prefixlen 64 
	inet 44.128.65.1 netmask 0xffffffc0 broadcast 44.128.65.63
	inet6 fe80::21c:c0ff:fe7d:8c50%bridge0 prefixlen 64 scopeid 0xd 
	nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
	id 00:00:00:00:00:00 priority 32768 hellotime 2 fwddelay 15
	maxage 20 holdcnt 6 proto rstp maxaddr 100 timeout 1200
	root id 00:00:00:00:00:00 priority 32768 ifcost 0 port 0
	member: vlan1 flags=143<LEARNING,DISCOVER,AUTOEDGE,AUTOPTP>
	        ifmaxaddr 0 port 15 priority 128 path cost 55
	member: tap0 flags=143<LEARNING,DISCOVER,AUTOEDGE,AUTOPTP>
	        ifmaxaddr 0 port 14 priority 128 path cost 2000000
vlan1: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> metric 0 mtu 1500
	options=3<RXCSUM,TXCSUM>
	ether 00:1c:c0:7d:8c:50
	nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
	media: Ethernet autoselect (1000baseT <full-duplex>)
	status: active
	vlan: 1 parent interface: em0

em0 at pci0:0:25:0:	class=0x020000 card=0x50038086 chip=0x10cd8086 rev=0x00 hdr=0x00
    vendor     = 'Intel Corporation'
    device     = '82567LF-2 Gigabit Network Connection'
    class      = network
    subclass   = ethernet
    cap 01[c8] = powerspec 2  supports D0 D3  current D0
    cap 05[d0] = MSI supports 1 message, 64 bit enabled with 1 message
    cap 09[e0] = vendor (length 6) Intel cap 2 version 0


-- 
Stefan Bethke <stb at lassitu.de>   Fon +49 151 14070811