This is a discussion on TCP/IP Newbie help - BSD ; Hi Guys, I am suffering an issue with international traffic speeds at the moment, where I can rarely get any speeds above 60 kilobytes per second from any overseas host. Local data here in Australia comes down at the full ...
Hi Guys,
I am suffering an issue with international traffic speeds at the moment,
where I can rarely get any speeds above 60 kilobytes per second from any
overseas host.
Local data here in Australia comes down at the full 10Mbit that my cable
connection allows.
In an email from them, they said this:
"Something to check out if you wish, is the TCP Receive Window that you
have set. If it is too low, it will reduce speeds to high latency
connections."
Not being an expert in TCP/IP, I have no idea what these should be set
to. They are just set at the defaults for OpenBSD.
[root@nas ~]# sysctl -a |grep tcp
net.inet.tcp.rfc1323=1
net.inet.tcp.keepinittime=150
net.inet.tcp.keepidle=14400
net.inet.tcp.keepintvl=150
net.inet.tcp.slowhz=2
net.inet.tcp.baddynamic=587,749,750,751,871
net.inet.tcp.recvspace=16384
net.inet.tcp.sendspace=16384
net.inet.tcp.sack=1
net.inet.tcp.mssdflt=512
net.inet.tcp.rstppslimit=100
net.inet.tcp.ackonpush=0
net.inet.tcp.ecn=0
net.inet.tcp.syncachelimit=10255
net.inet.tcp.synbucketlimit=105
net.inet.tcp.rfc3390=1
net.inet.tcp.reasslimit=3072
net.inet.tcp.sackholelimit=32768
Do they look ok? I'm not too worried if its not "bleeding edge"
optimization.
Any advice (besides to RTFM for TCP/IP would be appreciated).
Thanks!
Alex
alex wrote:
> In an email from them, they said this:
>
> "Something to check out if you wish, is the TCP Receive Window that you
> have set. If it is too low, it will reduce speeds to high latency
> connections."
Oh I should say that "they", are my ISP. lol. I just re-read it and saw
the ambiguity.
Or even a guide to tuning TCP under OpenBSD. I have looked at some via
using google, but they are For Other BSD's and mention sysctl variables
that dont appear to be valid in OpenBSD.
As a starter I have changed a few things:
[alex@nas ~]$ sysctl -a |grep space
net.inet.tcp.recvspace=65535
net.inet.tcp.sendspace=65535
net.inet.udp.recvspace=65535
net.inet.udp.sendspace=65535
I am seeing some improvement, but am going to monitor for at least 24
hours before jumping the gun and concluding that this has resolved my
issues.
Thanks!
PS: Sorry for the multiple posts rambling
alex wrote:
> Or even a guide to tuning TCP under OpenBSD. I have looked at some via
> using google, but they are For Other BSD's and mention sysctl variables
> that dont appear to be valid in OpenBSD.
>
> As a starter I have changed a few things:
>
> [alex@nas ~]$ sysctl -a |grep space
> net.inet.tcp.recvspace=65535
> net.inet.tcp.sendspace=65535
> net.inet.udp.recvspace=65535
> net.inet.udp.sendspace=65535
>
> I am seeing some improvement, but am going to monitor for at least 24
> hours before jumping the gun and concluding that this has resolved my
> issues.
>
> Thanks!
>
> PS: Sorry for the multiple posts rambling
looks like i am on my own with this one :/
