In my case, it's a

e...@pci0:12:0:0: class=0x020000 card=0x135e8086 chip=0x105e8086 rev=0x06 hdr=0x00
    vendor     = 'Intel Corporation'
    device     = 'PRO/1000 PT'
    class      = network
    subclass   = ethernet

Lars

On 2009-5-14, at 11:46, Lev Serebryakov wrote:
Hello, Lars.
You wrote 14 мая 2009 г., 12:28:43:

Reproducing the issue is as easy as setting net.inet.tcp.tso=1.
What's interesting is that I only see the issue on one of the eight em
interfaces. That interface is connected to a D-Link DIR-655 WLAN
router. When I tcpdump on the other interfaces with TSO enabled, I see
no "IP bad-len 0" messages.
 I have same problem (every one of 100-200 frames) on on-board if_em:

e...@pci0:0:25:0: class=0x020000 card=0x82681043 chip=0x10bd8086 rev=0x02 hdr=0x00
   vendor     = 'Intel Corporation'
   device     = '82566DM-2 Gigabit Network Connection'
   class      = network
   subclass   = ethernet



--
// Black Lion AKA Lev Serebryakov <l...@freebsd.org>


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