Collision check test is, if I remember right, a feature that wasn't in the
Ethernet spec but got added by IEEE 802.3. So old transceivers may not have
it. In spite of what the event says, it's not a send failure because the SQE
test signal occurs right after the packet is finished. If you have such a
transceiver, you may want to look into disabling the check. Failing that, turn
off the event.
If the transceiver does have SQE, then its failure might be due to a cable
problem. Check the Ethernet cable. It needs to be terminated at both ends and
nowhere else :-) and it needs to be grounded at exactly one point.
paul
> On Dec 19, 2024, at 5:15 PM, Warner Losh via cctalk <[email protected]>
> wrote:
>
> It's always SQE with thicknet. Too much or too little.
>
> On Thu, Dec 19, 2024, 3:03 PM Peter Ekstrom via cctalk <
> [email protected]> wrote:
>
>> I just learned what SQE does. I had to enable it on my AUI and it seems the
>> collision detection is happy now.
>>
>> -Peter
>>
>> On Thu, Dec 19, 2024 at 9:41 AM Peter Ekstrom <[email protected]> wrote:
>>
>>> Hi all,
>>>
>>> This may be a dumb question but I am a bit stumped. I can't seem to find
>>> any helpful info in the manuals. I have a DEQNA installed in my 11/23+
>> and
>>> I have run a NETGEN using the QNA driver. When NETINS runs I start seeing
>>> messages like these on the console:
>>>
>>> Event type 5.14, Send failed
>>> Occurred 19-DEC-24 09:30:11 on node 10.1 (TYCHO)
>>> Line QNA-0
>>> Failure reason = Collision detect check failed
>>>
>>> So obviously the link isn't working, but I find nothing helpful about
>>> where to start looking regarding the failed collision detect check. The
>>> line is on:
>>>
>>> NCP>show line qna-0 status
>>>
>>> Line status as of 19-DEC-24 09:36:31
>>>
>>> Line State
>>>
>>> QNA-0 On
>>>
>>> I have an Ethernet transceiver (I have 2 and have tried both, they worked
>>> last time I used them) connected to the DEQNA harness, and a cable
>>> connecting it to an old 10Base-T hub. I know that hub works because I
>> have
>>> a couple of other systems (OS/2 laptop and an AS/400) connected to it.
>>>
>>> So does anyone have any ideas of where I can start?
>>>
>>> Thanks in advance!
>>> Peter
>>>
>>
