Re: [gentoo-user] Re: CIFS mounts started misbehaving

[J. Roeleveld]

On March 4, 2017 12:41:05 AM GMT+01:00, Grant Edwards <grant.b.edwards@×××××.com> wrote:
>On 2017-03-03, J. Roeleveld <joost@××××××××.org> wrote:
>
>> On March 3, 2017 7:49:27 PM GMT+01:00, Grant Edwards
><grant.b.edwards@×××××.com> wrote:
>
>>>About a week ago, they started acting oddly.  They all mount fine,
>and
>>>work as usual as long as you keep using them.  AFAICT, if they sit
>>>idle for "a while" (tens of minutes, maybe an hour), they freeze up.
>
>[...]
>
>> My guess would be some timeout setting on the server killing the
>> login.
>
>That doesn't seem to be the problem.  I've asked around, and others
>aren't seeing this problem.
>
>I've also noticed that sometimes the mounts will start working again
>without a umount/mount, but I can't figure out what causes it...
>
>Normally, when things are working but idle, the TCP connection to 445
>shows an SMB echo request/rseponse transaction once per minute.  When
>it fails, the TCP connection evidently got dropped, and the Windows
>machine repeatedly shuts down new ones:
>
>The failure mode looks like this in wireshark:
>
>  Gentoo                            Windows
>
>          ->         SYN          ->  445
>         <-        SYN/ACK       <-   445
>          ->         ACK          ->  445
>          ->     SMB[echo req]    ->  445
>         <-          RST         <-   445
>
>[that repeats 800 times per second for long periods of time]
>
>Then at some point, it starts to work:
>
>          ->        SYN          ->  445
>         <-       SYN/ACK       <-   445
>          ->        ACK          ->  445
>          -> SMB[proto neg req]  ->  445
>         <-  SMB[proto neg rsp] <-   445
>          -> SMB[ses setup req]  ->  445
>         <-  SMB[ses setup rsp] <-   445
>                     ...
>
>Sometimes the umount times out and "fails" because the "host is down",
>and when that happens, it seems like it immediately starts to work
>again. :/

Are other hosts linux or windows?

Maybe a dodgy switch forgetting the correct path?

--
Joost
-- 
Sent from my Android device with K-9 Mail. Please excuse my brevity.