Re: Question on IPv6 failover.

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On Thu, Oct 3, 2013 at 4:04 PM, Ben Greear <greearb@xxxxxxxxxxxxxxx> wrote:
> One of our users is reporting that the CIFS failover case is not working
> properly.  They have a cluster of CIFS servers that migrate an IPv6 addr
> to the active system.
>
> Evidently, our client-side CIFS connection follows the first migration,
> but fails to go back to the original on a second failover.
>
> It could be any number of things, but I wanted first to see if anyone
> knows how long client-side CIFS will keep attempting to regain contact with
> it's
> server?  Forever?
>
> Thanks,
> Ben

Depends on kernel version and also hard vs. soft (default) mount options.

The "smb echo" approach that cifs moved to a few years ago allows
the cifs kernel client to notice more quickly that the server is down,
and significantly improved failover.

Which kernel version?


-- 
Thanks,

Steve
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