[Info-vax] DECserver/LAT across DECnet areas?

Johnny Billquist bqt at softjar.se
Mon Jul 24 19:26:19 EDT 2023


On 2023-07-25 00:41, Arne Vajhøj wrote:
> On 7/24/2023 9:28 AM, Johnny Billquist wrote:
>> On 2023-07-22 20:41, Arne Vajhøj wrote:
>>> Non-routed bridged-only long distance net would work around
>>> the non-routable characteristics of LAT.
>>>
>>> But my experience with LAT (30-35 years ago) is that it is also
>>> where latency sensitive. Excessive delays results in timeout errors.
>>
>> Been using bridge to run LAT across the whole world, carried over UDP. 
>> Works just fine everywhere I've tried.
>>
>> The internet is sooo fast these days that LAT timeouts are close to 
>> eternity in comparison.
> 
> As I remember it then just putting more than 2 bridges between
> the two ends within the same building was enough to cause timeouts.
> 
> And while internet bandwidth has exploded then latency has not
> been similarly reduced. Small technical problem called
> speed of light.

Well. If you refuse to believe me when I say that around the whole world 
on a bridged ethernet running LAT works fine, then there isn't much I 
can do for you.

You can fetch the bridge here: http://mim.stupi.net/bridge.tar
and then you can try yourself.

   Johnny




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