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I've been searching for resolutions for this problem all day, and the
only thing I've found is this old thread:
http://www.in-addr.de/pipermail/lvs-users/2003-February/007885.html
The problem, as described by one of my customers, is this (the
customer is running phpBB on 3 Linux/Apache servers with an LVS-Tun
setup):
"For very few users, when they post long posts (anything over a few
lines) and hit submit, the browser appears to hang and finally it
times out. Similar effects if they try and update their profiles. I
even experienced this on my home computer. I use a proxy server
sometimes and it showed the request being transmitted from my computer
but ultimately no response was received from the site. Now, in most
instances of this, we have found that the affected users are on
broadband using a router of some type. I myself use a cable modem
connected through a Linksys Router. When I experienced the issue, I
was able to post from work, but not from home. I fiddled with my
setup, thinking it was cookies or caching of some type and ultimately
performed a firmware upgrade on my router. Suddenly the problem went
away."
At the time, I was running kernel 2.4.25 (IPVS 1.0.10), but since
upgraded to 2.4.26 (IPVS 1.0.11), then 2.6.6 (IPVS 1.2.0). I have
asked the customer to retest it, but he'll have to talk to some of his
users, from the sound of things, since he upgraded his router
firmware. I'd love to chalk it up to "client router problems," but
that probably won't be good enough for this customer. It worked using
a Riverstone smartswitch router running what equates to LVS-NAT, but
it does not work with this LVS-Tun setup.
With all three versions, I get a lot of these messages:
IPVS: ip_vs_tunnel_xmit(): frag needed
I don't know if it's related, but I'm pretty sure it is after reading
that thread.
Any help is appreciated.
--
Casey Zacek
Senior Engineer
NeoSpire, Inc.
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