i used the ACL to block the ICMP unrechable response from the server and i activated the helper-address to the server. it is working without any problems.
did you ever encountered this kind of problem ?
this are the events of our failure:
originaly the citrix farm was in our main Vlan and one of the actions we took before we knew what causing the problem was to transfer the citrix farm to
a diffrent Vlan. I opend 5 ip helper-address in the main Vlan (before the transfer) direct to 5 servers and that caused the problem.
when we tested the farm on a diffrent Vlan we so that the farm is working ok, just untill we added the IP HELPPER-ADDRESS command to specific servers on the new Vlan.
thank you for your time,