On Mon, Aug 02, 2004 at 08:53:58PM -0400, Ben Vitale wrote: > Hi, > Yes, I realize this is an often asked question, and for that I > apologize. I have the two lines.. > > alias net-pf-10 off > alias ipv6 off > > ..in my /etc/modprobe.conf, and I have restarted several times since > they were put in place. They have had no effect, and I don't think IPv6 > is the culprit anyway.. my ifconfig shows all regular IP addresses. > I checked the ping times of my nameservers, and the one at the top > of /etc/resolv.conf has the best times - on average, 8.5ms. I would > assume this is just a Comcast provider problem, but this was not an > issue until I upgraded to FC2. Ben - I wonder if it is a problem with ECN on the nameserver or somewhere on the route? First check to see if you have ECN turned on in your kernel: cat /proc/sys/net/ipv4/tcp_ecn If you get a 1 back, it is turned on. As a test, turn it off by: echo 0 > /proc/sys/net/ipv4/tcp_ecn and see if the slow ping still happens. BTW, Ian Gulliver wrote a useful program called ecncheck which tests ECN along a route. There is also a companion program called ecnmx which compiles from the same tarball that does the same for mailservers. Look for it on freshmeat.net -- Jack Bowling mailto: jbinpg@xxxxxxx
