Slow network because of ipv6 troubles?

From: Charlie Calvert (ccalvert_at_pacbell.net)
Date: 01/10/05 

Date: Mon, 10 Jan 2005 20:50:00 GMT

Perhaps after performing a routine update via up2date or yum, my Fedora
system recently slowed down considerably when I started accessing the
Internet. I suspect that the problem is with ipv6. Perviously, I had
turned ipv6 off by adding this line to modprobe.conf:

alias net-pf-10 off

But suddenly this didn't seem to be enough. I was experiencing long
waits while resolving DNS names to ip addresses.

I did some research, and came up with this line, which I added to my
modprobe.conf file:

alias ipv6 off.

This appears to have resolved the problem, as it least some sites are
now responding immediately when I browse to them. (Though the net does
seem slow today....)

My questions:

1) Does anyone have any idea why I need to add this last line to
modprobe.conf? What exactly do the lines do?

2) Does someone know what is going on with ipv6? I understand the need
for it in the long term, but why is it so slow on my system? Is there a
place on the net that explains what is going on with ipv6?

Thanks

- Charlie 

-- 
Charlie Calvert
http://www.codefez.com
http://www.elvenware.com
Most recent article:
http://www.codefez.com/Default.aspx?tabid=79&newsType=ArticleView&articleId=73

Relevant Pages

  • Re: Slow network because of ipv6 troubles?
    ... Charlie Calvert wrote: ... > Perhaps after performing a routine update via up2date or yum, my Fedora ... I suspect that the problem is with ipv6. ... > waits while resolving DNS names to ip addresses. ...
    (alt.os.linux.redhat)
  • Re: Networking problem
    ... alias net-pf-10 ipv6 off ... have different ways of signalling to the init scripts that they want it ... and ISP problem right off the bat ...
    (comp.os.linux.setup)
  • Re: Networking problem
    ... For RHEL (and probably CentOS), ... alias net-pf-10 ipv6 off ... and ISP problem right off the bat ...
    (comp.os.linux.setup)
  • Re: ipv6, kill it once and for all
    ... Am Sonntag, den 26.08.2007, 21:46 -0500 schrieb John Pierce: ... If I uncomment the following lines in /etc/modprobe.conf ... #alias ipv6 off ... alias net-pf-10 off ...
    (Fedora)
  • Re: howto debug slow WLAN connection?
    ... Posting from groups.google.com dramatically ... VERY WELL KNOWN problem is misconfigured DNS servers that ignore IPv6 ... alias net-pf-10 ipv6 off ...
    (comp.os.linux.networking)