[lvs-users] LVS-NAT issue

[Cristi <cere@xxxxxxxxxx>]

Hello,

I am having some issues with my LVS-NAT. Topology is as follows:

Director eth0-               public address
                     :100-VIP - public-
                 eth1: 192.168.100.2, default GW for real servers

VIP set as lo:0 alias on both real servers.

[root@LB2 ~]# ipvsadm -Ln
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
  -> RemoteAddress:Port           Forward Weight ActiveConn InActConn
TCP  VIP:80 rr
  -> 192.168.100.4:80             Masq    1      0          0
  -> 192.168.100.3:80             Masq    1      0          0

The problem is as folows: the setup works randomly, fron 15 mins to 1-2 
hours, flawlessly, i might add, serving content from both backend 
machines. However, it randomly stops doing that. When that happens, i 
cannot ping the VIP from the outside, only from within the LAN (i have a 
backup LB, not configured yet, i plan to use ultramonkey later on). I 
checked logs, tcpdumped but with no clue as of what is causing this. 
Some input would be really appreciated.

Regards,

Cristi