With the new Virtualcenter 2.5 Update 2 comes some tighter restrictions on HA network configurations.  This error message commonly occurs when the nodes in a cluster contain incompatible networks. An attempt to reconfigure clusters might fail now if they do not have identical networks. Some customer are reporting the message: HA agent on <esxhostname> in [...]

As soon as Update 2 of Virtualcenter 2.5 hits the streets we started getting calls into support lines here at VMware about HA breaking. Common reports include: “insufficient resources to satisfy HA failover level on cluster” and “unable to contact a primary HA agent in cluster” We think we know what is causing this, so [...]

My previous article on HA failover capacity generated a bit of buzz and some discussion in the blogosphere. I have a few more details today which may clear some of the air on this. A question was raised about the calculation used in admission control. I was previously under the impression that Configured Memory (in [...]