[OmniOS-discuss] strangeness ssh into omnios from oi_151a9

[Richard PALO]

Le 01/10/15 11:58, Lauri Tirkkonen a écrit :
> On Thu, Oct 01 2015 11:50:03 +0200, Richard PALO wrote:
>>>> In that case, wouldn't setting tcp_tstamp_always on OI to '1' be better in
>>>> this case (or would OI not honour that setting correctly)?
>>>
>>> It wouldn't work. From what I can tell, those ndd settings only affect
>>> the SYN segments (ie.  timestamp negotiation); pre-5850 illumos will
>>> always stop timestamping mid-connection if it receives a non-timestamped
>>> segment.
>>>
>>
>> Okay, I set tcp_tstamp_if_wscale to 0 and it does seem to work fine.
> 
> Thanks, that pretty much confirms the issue is what I suspected it is.
> 
>> (Hoping there isn't any fallout from doing this now...)
> 
> As long as that middlebox has been mucking with your traffic in the way
> it is, timestamps have been getting turned off mid-connection for your
> pre-5850 box. I recommend you to ugprade to post-5850 if you can, or to
> scream loudly at whoever is modifying your traffic :)
> 

Actually I still notice some problems.. This morning in the direction OI => omnios 
things seemed okay.
Now, omnios => OI I just now experienced the hang again, and it is repeatable.

Could it be that your workaround is only useful for outbound connections (relative to OI)?

-- 
Richard PALO