On Mon, Jul 09, 2001 at 11:05:13PM +0100, Richard Smith wrote:
> Please cc me, as I'm not on this list.
>
> I am using 4.3-RELEASE, and investigating why I don't see
> any keepalives (using tcpdump) on my connections.
>
> The default values are as follows:
> net.inet.tcp.keepidle = 7200000
> net.inet.tcp.keepintvl = 75000
>
> It seems to me that the keepalive interval is being set
> by keepidle, thus setting keepidle = 20000, generates
> keepalives at 20s intervals.
>
> Looking at the comments in tcp_var.h, it should be
> keepintvl that sets this interval. Otherwise, why
> have such a large value for keepidle?
>
> Is this a bug? Or have I missed something,
>
Only TCP sockets marked with SO_KEEPALIVE setsockopt(2) will
be kept alive. Alternatively, you can enable this option on
all sockets implicitly by net.inet.tcp.always_keepalive=1.
(Or by setting tcp_keepalive rc.conf(5) variable to "YES").
Cheers,
--
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