dummynet = local taffic > 100ms - help!

[Mike Silbersack]

On Wed, 11 Feb 2004, Richard Wendland wrote:

> Well, with HZ=10000 RFC1323 TCP connections will stop after 59.7 hours,
> with HZ=100000 after 6 hours.  For those with long running TCP connections
> (eg remote backup) that could be a big deal.  See 4.2.3 of RFC1323.
>
> It does seem quite a few people want HZ>1000 so I think the time has
> come to isolate the TCP timestamp option clock from the HZ value to
> avoid this problem.  For now they should set net.inet.tcp.rfc1323=0 to
> avoid breaking RFC1323.
>
> Note this doesn't affect routed packets, only TCP connections to/from
> that host.
>
> Tom Pavel sent some patches to this list on 14 Jan 2004 that he has been
> using to overcome this HZ/RFC1323 problem.
>
> 	Richard
> --
> Richard Wendland				richard at wendland.org.uk

I'm aware of those patches, looking at and committing them is on my to-do
list.  I don't have any immediate plans to work on it, although I will
make sure to get it in before 5.3.

Mike "Silby" Silbersack