I don't think thats the root cause. I'm able to connect to the webinterface using the NEW IP-address.
Inside the plugin-manager it says:
vCenter Operations Manager
VMware, Inc.
5.6.0.923459
Disabled
vCenter Operations Manager
extension
The following error
occured while
downloading the
script plugin from
https://192.168.2.50/
vcops-vsphere/viClie-
ntConfig.xml:
The request failed
because of a
connection failure.
(Unable to connect to
the remote server)
If I could tell the plugin to connect to 192.168.2.51 instead of .50 there wouldn't be an issue any more. The question is - how?