Re: mixed VLAN problems on msk(4)

On Tue, Jun 09, 2009 at 12:58:23PM +0200, Ian Freislich wrote:
> Hi
> 
> Debugging some network problems last night, I noticed that I'd get
> packet loss on a mixed tagged/untagged network every time a tagged
> VLAN packet arrived, so long as hardware VLAN support was enabled
> on my NIC.  The moment hardware tagging was disabled (manually, or
> by tcpdump) the packet loss disappeared.
> 
> My msk(4) hardware:
> 
> mskc0_at_pci0:2:0:0:       class=0x020000 card=0x532111ab chip=0x436211ab rev=0x22 hdr=0x00
>     vendor     = 'Marvell Semiconductor (Was: Galileo Technology Ltd)'
>     device     = 'Marvell Yukon 88E8053 PCI-E Gigabit Ethernet Controller (88E8053)'
>     class      = network
>     subclass   = ethernet
>     cap 01[48] = powerspec 2  supports D0 D1 D2 D3  current D0
>     cap 03[50] = VPD
>     cap 05[5c] = MSI supports 2 messages, 64 bit enabled with 2 messages
>     cap 10[e0] = PCI-Express 1 legacy endpoint max data 128(128) link x1(x1)
> 
> The switch was configured as follows:
> 
> Port is member in: 
>  
> Vlan               Name               Egress rule Port Membership Type 
> ---- -------------------------------- ----------- -------------------- 
>  14                 14                 Untagged          Static        
>  26                 26                  Tagged           Static        
> 1000               1000                 Tagged           Static        
> 
> It appears not to matter whether the vlans are configured with the
> msk(4) interface as the parent or not.  For example, whenever one
> of these broadcasts is recieved:
> 
> 12:49:36.093250 IP 41.154.87.2 > 224.0.0.18: VRRPv2, Advertisement, vrid 19, prio 0, authtype none, intvl 1s, length 36
> 12:49:37.097514 IP 41.154.87.2 > 224.0.0.18: VRRPv2, Advertisement, vrid 19, prio 0, authtype none, intvl 1s, length 36
> 12:49:38.099525 IP 41.154.87.2 > 224.0.0.18: VRRPv2, Advertisement, vrid 19, prio 0, authtype none, intvl 1s, length 36
> 
> traffic to the untagged address on vlan14 (basically the address
> on msk0) is dropped.  If I disable vlanhwtag on msk0, the interface
> suffers no packet loss on reciept of tagged frames.
> 

Would you show me the output of "sysctl hw.busdma"?