Problems with BCE network adapter (Dell PE2950)

[David Christensen]

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 

> 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