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Strange items in connection table

To: lvs-users@xxxxxxxxxxxxxxxxxxxxxx
Subject: Strange items in connection table
From: matthias.krauss@xxxxxxx
Date: Mon, 8 May 2006 21:18:40 +0200 (MEST)
Hi,
i've a strange problem with my director box which runs now almost 2 years
very well. i've seen today over 67000 ! connection items in the connection
table and almost all of them shows strange timer values like:

IP  5960:54 NONE        80.38.149.nn:0    0.0.0.5:0          10.0.1.nn:0
IP  5948:53 NONE        83.129.30.nn:0    0.0.0.5:0          10.0.1.nn:0

All ip addresses occures only ones (uniqe) within the connection table.

I've a persistent node running configured with 3600 sec. using fwmark,
it's a Debian Woddy, patched 2.4.23 Kernel with ipvs-1.0.9 or ipvs-1.0.10
running. I had to restart the server a couple days ago due to electricity
reasons, since then i notice this problem. ....

I also did a test from home and didn't saw this behaviour from my home
address so i can't reconstruct.

After a restart of the machine it looks better but i still see a couple
entires > 3600 sec.

I grabbed this after the reboot from dmesg:
May  8 18:51:11 lvs kernel: ip_tables: (C) 2000-2002 Netfilter core team
May  8 18:51:11 lvs kernel: ip_conntrack version 2.1 (4094 buckets, 32752
max) - 292 bytes per conntrack
May  8 18:51:11 lvs kernel: IPVS: Connection hash table configured
(size=4096, memory=32Kbytes)
May  8 18:51:11 lvs kernel: IPVS: ipvs loaded.
May  8 18:51:11 lvs kernel: IPVS: [wlc] scheduler registered.
May  8 18:51:12 lvs kernel: IPVS: [wrr] scheduler registered.

lsmod returns:
ip_vs_wrr               1472   8  (autoclean)
ip_vs_wlc               1024   7  (autoclean)
ipt_LOG                 3328   3  (autoclean)
ipt_MARK                 800  92  (autoclean)
ip_vs                  50200  17  (autoclean) [ip_vs_wrr ip_vs_wlc]
iptable_mangle          2176   1  (autoclean)
iptable_nat            14708   0  (autoclean) (unused)
ip_conntrack           17620   1  (autoclean) [iptable_nat]
iptable_filter          1728   1  (autoclean)
ip_tables              11008   7  [ipt_LOG ipt_MARK iptable_mangle
iptable_nat iptable_filter]

ipvsadm output of the persistent node is:
FWM  5 wlc persistent 3600
  -> srv1.intern:0         Route   100    35         8
  -> srv2.intern:0         Route   200    41         51

and another:
FWM  6 wlc persistent 3600
  -> srv1.intern:0         Route   100    68         48


Does anybody have a idea how to solve this ?

Many thx
Matthias





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