I installed a Hybrid Core on a VMware Server virtual machine, with 256 MB RAM. It's also my DHCP server, currently. The Core responds within 5 seconds to all clicks, but the MD never responds within 1 minute. It even has 1 GB RAM, and a faster CPU... Multiple reboots don't help, so it looks like it is the network. The VM Core has fast networking to an orbiter running on my Windows Server, so that isn't it...
Does anyone know a solution?
Well we usually use a minmum of 512mb of RAM in a hybrid Core and often 1gb. We have never attempted to run a Core with little RAM, 256mb is pretty tight, so I would say that this could be the real problem.