Problems with FTP Service and virtual IPs (NEED HELP)

Hello everybody,

may someone can help me, with a problem i have.

The setup is as follows:

a phsyical ip on eth0 like 192.168.1.19
a logical ip on eth0 like 192.168.1.20

a ping to both from any machine one the network is successful
ssh to both from any machine one the network is successful

I've setup an ftp service, at first with no bindings, afterwards with
bindings. It doesn't matter,
Accessing ftp via phsyical ip address is absolutely no problem.
accesing ftp via virtual ip works fine 2 to 4 times and then ends
in socket errors (leech get) or The Page cannot be display (IE)
oven command line ftp (either win or lin) doesn't work.
I've tried multiple clients and plattforms. Virtual IP doesn't work, phsical
works.

So i searched around a little bit an fond out the following:

linux:~ # netstat -an | grep 21
tcp 0 0 192.168.1.20:21 0.0.0.0:* LISTEN
tcp 0 0 192.168.1.20:21 192.168.1.22:4124 SYN_RECV
or ESTABLISHED

everytime this happens, i can see the above state with netstat

After about 4 minutes everything is fine again. I think this is an tcp
timeout.

I need the virtual ip support, because it's an cluster.

Some words about the os:

SLES8
SP2a
k_smp-2.4.19-304


Thanks,

Dirk Laurenz