8.0-REL lagg(4) + vlan(4) + em(4) problems

[Matt Burke]

Jeff Blank wrote:
> I wrote:
>> I've just upgraded a 7.1-REL server to 8.0-REL and have lost my
>> ability to use vlan(4) on top of lagg(4) on top of em(4).

A workaround for this is to disable hardware vlan tagging:

# ifconfig em0 -vlanhwtag

(don't forget to do all em interfaces and put it in rc.conf)

In my case too, Wireshark's showing the frames received by another machine
to be ISL (manually verified to be a valid ISL frame of the correct vlan),
however tcpdump on the local em0 interface of the broken sending box shows
a correctly formatted 802.1Q frame.

Unfortunately I don't have the ability to sniff what's actually on the wire
at the moment.

All packets sent appear to be affected regardless of protocol.



dmesg:
FreeBSD 8.0-RELEASE-p2 #7: Mon Jan 18 12:13:20 GMT 2010
...
em0: <Intel(R) PRO/1000 Network Connection 6.9.14> port 0xbce0-0xbcff mem
0xfd5e0000-0xfd5fffff,0xfd5c0000-0xfd5dffff irq 19 at device 0.0 on pci12
em0: Using MSI interrupt
em0: [FILTER]
em0: Ethernet address: 00:15:17:a5:d7:c4
em1: <Intel(R) PRO/1000 Network Connection 6.9.14> port 0xbcc0-0xbcdf mem
0xfd5a0000-0xfd5bffff,0xfd580000-0xfd59ffff irq 16 at device 0.1 on pci12
em1: Using MSI interrupt
em1: [FILTER]
em1: Ethernet address: 00:15:17:a5:d7:c5


pciconf -lv:
em0 at pci0:12:0:0:	class=0x020000 card=0x135e8086 chip=0x105e8086 rev=0x06
hdr=0x00
    vendor     = 'Intel Corporation'
    device     = 'HP NC360T PCIe DP Gigabit Server Adapter (n1e5132)'
    class      = network
    subclass   = ethernet
em1 at pci0:12:0:1:	class=0x020000 card=0x135e8086 chip=0x105e8086 rev=0x06
hdr=0x00
    vendor     = 'Intel Corporation'
    device     = 'HP NC360T PCIe DP Gigabit Server Adapter (n1e5132)'
    class      = network
    subclass   = ethernet


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