Hi
Can I ask the question?
What is the latest CentOS to use the TCP scaling window algorithm to the RFC?
When I use this CentOs as router, ls there any problem?
Thank you
--- Mark Hull-Richter mhullrich@gmail.com wrote:
On Tue, 2007-11-13 at 11:54 -0500, Ross S. W. Walker wrote:
3 possible scenarios:
- DNS not properly configured
Make sure your resolv.conf is properly configured,
if you are doing
DHCP look into having your resolv.conf set through
it, if you are
using PPPOE you can have the ppp daemon set it too
if the DNS is
passed over the ppp connection.
Don't have a resolve.conf.
- TCP MTU and blackhole router if PPPOE
If you are doing PPPOE then make sure the MTU on
the ppp interface
link is set to 1492 as pppoe uses 8 bytes for ppp
framing. If it is
set to 1500 then some large packets will drop and
the stack will
have to resend smaller and smaller till it goes
through. If ICMP
need to frag messages are dropped then the
connections will stall
completely.
1492, by default.
- TCP scaling window and broken router
The latest CentOS uses the TCP scaling window
algorithm to the RFC
spec which some routers don't support. Some people
have noticed
that this solves the problem when communicating to
other hosts
over the Internet.
sysctl -w net.ipv4.tcp_window_scaling=0
I tried it - will see. BTW, this wouldn't muck up my keyboard shortcuts, would it? I noticed that after I executed this, some of them stopped working - again.
mhr
CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
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