Network often not responding

Akhmad Sakirun saki at
Thu Aug 10 13:55:52 UTC 2006

I little bit frustated
after getting no luck with Pyun YongHyeon patch, i run cvsup today and
going to see what happen tomorrow.
It's happen only on bussy hour/work hour but not on afternoon until
morning. it's mean only happen when on maximum/heavy traffic load.
I suspected it's error on motherboard or the system.

now i'm using 2 ethernet using 2 different catalyst switch and 2 different network.
1st ethernet:

em0: <Intel(R) PRO/1000 Network Connection Version - 6.0.5> port 0xa800-0xa83f mem 0xfeaa0000-0xfeabffff,0xfea80000-0xfea9ffff irq 18 at device 3.0 on pci2
em0: Ethernet address: 00:e0:81:31:af:ca
em0: [FAST]

2nd ethernet:
xl0: <3Com 3c905B-TX Fast Etherlink XL> port 0xa880-0xa8ff mem 0xfeafec00-0xfeafec7f irq 19 at device 7.0 on pci2
miibus0: <MII bus> on xl0
xlphy0: <3Com internal media interface> on miibus0
xlphy0:  10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
xl0: Ethernet address: 00:10:5a:0d:c1:45

Best regards,

Thursday, August 10, 2006, 8:08:45 PM, Dominic wrote:
> Stanislaw Halik wrote:
>> On Wed, Aug 09, 2006, Dominic Marks wrote:
>>>> Aug  9 15:09:16 cache kernel: xl0: transmission error: 90
>>>> Aug  9 15:09:16 cache kernel: xl0: tx underrun, increasing tx start
>>>> threshold to 120 bytes
>>> dc%d: TX underrun -- increasing TX threshold  The device generated a
>>> transmit underrun error while attempting to DMA and transmit a packet.
>>> This happens if the host is not able to DMA the packet data into the
>> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>>> NIC's FIFO fast enough.  The driver will dynamically increase the
>>   ~~~~~~~~~~~~~~~~~~~~~~
>>> trans- mit start threshold so that more data must be DMAed into the
>>> FIFO before the NIC will start transmitting it onto the wire."
>>> So it would seem like the card cannot keep pace with the system. What NICs
>>                         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>>> have you tried?
>> Basing on the quoted text, isn't it the opposite?

> Yep! I should read more than the first line on things, especially when
> quoting
> them to others :)

> Dom
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