FTP Loadbalancing Problem alteon 184

[icemaster]

Hi,

I am using an Alteon 184 and I am trying to do something simple. FTP Load balancing. (I hope this is simple )
It appears that the connection to the FTP Server is sporadic meaning it works 20 times then doesn't work 3 times, then works 5 then doesn't work 6.

Here is a sample config:

/c/slb/real 1
ena
rip 192.168.10.10
proxy dis
name "ye ol FTP Server"

/c/slb/group 10
metric hash
health ftp
add 1
name "ftp service"
/c/slb/group 20
metric hash
health ftp
add 1
name "ftp-data service"

/c/slb/virt 6
ena
vip 10.1.1.1
dname "officalftp.home.de"
/c/slb/virt 6/service ftp
group 10
ftpp ena
/c/slb/virt 6/service ftp-data
group 20
ftpp ena

DMA or DAM is enabled and thus the ftp-data is also required. Anyone have any idea how or what could be a problem? When it does not work it seems the Loadbalancer does not forward the ACK's to the real ip address. At least from our traces it appears so.

Would be happy for any info, help, comment?

Thanks,
Corey