Tcp Tuning for boardband ?

Richard cms0009 at gmail.com
Tue Nov 20 15:11:13 UTC 2007


On Tuesday 20 November 2007 4:05:14 am you wrote:
> Richard wrote the following on 20.11.2007 05:36
>
> <<-snip->>
>
> >  net.core.rmem_max = 524288
> >
> >  net.core.wmem_max = 524288
> >  net.ipv4.tcp_wmem = 4096 87380 524288
> >  net.ipv4.tcp_rmem = 4096 87380 524288
>
> those i used in the past
> but i haven´t any numbers compared to without them

I can add these to the config file above with no issues, right ?




> >  net.ipv4.tcp_rfc1337 = 1
> >  net.ipv4.ip_no_pmtu_disc = 0
> >  net.ipv4.tcp_sack = 1
> >  net.ipv4.tcp_fack = 1
> >  net.ipv4.tcp_window_scaling = 1
>
> use "window scaling" with caution.
> see:
> http://lwn.net/Articles/92727/

Thilo, can I add these too, but CHANGE the window_scaling = 0
according to the link you listed, this way, it would be compatible with the 
broken routers out there, or NO ?



>
> >  net.ipv4.tcp_timestamps = 1
> >  net.ipv4.tcp_ecn = 0
> >  net.ipv4.route.flush = 1
> > ------------
> > Now, I thought I would as,k the the network specialist
> > out there, if these setting would make any real diff.
>
> the tcp buffers can make a difference in my experience, but those settings
> are Link relatet.
> So play a little around to find the setting that works for you best.

these above would be okay as well ?




>
> Apart from that.
> A real big difference in network speed is to install a local DNS cache such
> as "pdnsd".
> That will greatly reduce network delay in Nameresolution and therefore
> speed up you surfing greatly.

Thanks very much, will look into this pdnsd dns cache for my laptop.

Richard







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