This a 'simple' server directly connected to port 3/17. Netmask 255.255.255.0
To make it 'more interesting', not all servers have this problem but I can't find any common thing on the server which I can isolate.
The trunk has three vlans, all servers I'm talking about are in vlan 2 and the trunk has this vlan
I 'suspect' the port channel between the switches but why should it 'block' arp messages.....
The traffic intended for the servers on switch A which arrives first on switchB (because of the network setup) now gets broadcasted over switchB, ends up at switchA via the port channel and reach the destination. But this is not the way it should go.