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Re: kern/51753: tcp SACK causes SSH disconnects
The following reply was made to PR kern/51753; it has been noted by GNATS.
From: "John D. Baker" <jdbaker%mylinuxisp.com@localhost>
Subject: Re: kern/51753: tcp SACK causes SSH disconnects
Date: Fri, 30 Dec 2016 09:20:52 -0600 (CST)
This looks a lot like something I was seeing when working on some remote
systems. It was most likely to occur with high output traffic (such as
when running an update build of the system).
It also seemed to be affected by one or more intervening routers between
the client and server. A "direct" connection to the problem machine
would be unstable but SSH-ing to another host first and then connecting
to the problem system would be rock solid. That "other host" could be
another machine on the same LAN as the problem machine, also running
NetBSD-7/amd64, or another remote machine (not on same LAN) running
The problem machine was later replaced and the behavior has not been
observed on the replacement. Said problem machine is now in my possession
and did not exhibit the behavior when connected to my LAN.
There was a thread about this in one of the other mailing lists some
time back (either current-users@ or netbsd-users@), but I haven't been
able to locate it so far.
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