Problems with BCE network adapter (Dell PE2950)

[Tom Judge]

David Christensen wrote:
> It's not a problem I've seen before.  The driver seems to be 
> passing an Ethernet frame up the stack with a length of -4.
> Is there anything unusual about your network setup like VLAN
> tagging, jumbo frames, or anything else that might cause
> the Ethernet frame to be formatted in an unusual manner?
> The error probably occurs in bce_rx_intr() but I'd need to
> see the packet that's causing the problem to figure out why
> the driver isn't calculating the packet length correctly.
> 
> Dave 
> 
Hi Dave,

The network is running Jumbo frames (8192 Byte frames).  There are 5 
PE2950's and 7 PE1950's with this NIC on this network.  However it is 
always the same system that causes the crash in the same manner.  I will 
look into reproducing the error tomorrow with the switch port mirrored 
to a second server (with an em NIC).  Hopefully I will get some useful 
dump files from tcpdump....

Do you have any idea what the frame might look like that causes this error?

Here is the NIC config from the system:

 >> #ifconfig bce0
 >> bce0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 8192
 >>          options=3b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU>
 >>          inet 172.31.0.13 netmask 0xffffff00 broadcast 172.31.0.255
 >>          inet 172.31.0.157 netmask 0xffffffff broadcast 172.31.0.157
 >>          inet 172.31.0.161 netmask 0xffffffff broadcast 172.31.0.161
 >>          ether 00:18:8b:88:d8:81
 >>          media: Ethernet autoselect (1000baseTX <full-duplex>)
 >>          status: active

If its any use the switch is a Dell PowerConnect 5324.

Tom

>> I am seeing some problems with one of my Dell PowerEdge 
>> 2950's (running 
>> RELENG_6_2) on board bce NICs.  The interface seems to crash with the 
>> following errors, to which the fix seems to be and "ifconfig 
>> bce0 down; 
>> ifconfig bce0 up":
>>
>> Jun  7 12:20:29 gonzo kernel: bce0: discard frame w/o leading 
>> ethernet 
>> header (len 4294967292 pkt len 4294967292)
>> Jun  7 12:20:29 gonzo last message repeated 54 times
>> Jun  7 12:20:58 gonzo kernel: nfs server nfs-server:/usr/home: not 
>> responding
>>
>>
>> Is this a know problem? If so is there a solution?
>>
>> Tom
>>
>> #uname -a
>> FreeBSD gonzo.mintel.co.uk 6.2-RELEASE FreeBSD 6.2-RELEASE 
>> #10: Thu Apr 
>>   5 10:53:39 BST 2007 
>> root at roley.mintel.co.uk:/usr/obj/usr/src/sys/PE2950 amd64 
>> amd64 Intel(R) 
>> Xeon(R) CPU 5160  @ 3.00GHz FreeBSD
>>
>>
>> ## dmesg.boot snippet
>> bce0: <Broadcom NetXtreme II BCM5708 1000Base-T (B2), v0.9.6> mem 
>> 0xf4000000-0xf5ffffff irq 16 at device 0.0 on pci9
>> bce0: ASIC ID 0x57081020; Revision (B2); PCI-X 64-bit 133MHz
>> miibus0: <MII bus> on bce0
>> brgphy0: <BCM5708C 10/100/1000baseTX PHY> on miibus0
>> brgphy0:  10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, 1000baseTX, 
>> 1000baseTX-FDX, auto
>> bce0: Ethernet address: 00:18:8b:88:d8:81
>>
>> ## pciconf -lv snippet
>> bce0 at pci9:0:0:  class=0x020000 card=0x01b21028 
>> chip=0x164c14e4 rev=0x12 
>> hdr=0x00
>>      vendor   = 'Broadcom Corporation'
>>      class    = network
>>      subclass = ethernet
>>
>> #ifconfig bce0
>> bce0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 8192
>>          options=3b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU>
>>          inet 172.31.0.13 netmask 0xffffff00 broadcast 172.31.0.255
>>          inet 172.31.0.157 netmask 0xffffffff broadcast 172.31.0.157
>>          inet 172.31.0.161 netmask 0xffffffff broadcast 172.31.0.161
>>          ether 00:18:8b:88:d8:81
>>          media: Ethernet autoselect (1000baseTX <full-duplex>)
>>          status: active
>>
>> #Switch port counters
>> console# show interfaces counters ethernet g10
>>        Port        InOctets  InUcastPkts InMcastPkts InBcastPkts
>> ---------------- ---------- ----------- ----------- -----------
>>        g10        2615415297  87563987        0         13480
>>
>>        Port       OutOctets  OutUcastPkts OutMcastPkts OutBcastPkts
>> ---------------- ---------- ------------ ------------ ------------
>>        g10        2535595313  136391705     10740316     1420686
>>
>> FCS Errors: 0
>> Single Collision Frames: 0
>> Late Collisions: 0
>> Excessive Collisions: 0
>> Internal MAC Tx Errors: 0
>> Oversize Packets: 0
>> Internal MAC Rx Errors: 0
>> Received Pause Frames: 0
>> Transmitted Pause Frames: 0
> 
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