Matteo, just so you understand the reasoning behind needing icmp responses from the service console gateway: When an HA node cannot communicate with the other nodes in the cluster the HA node pings the default gateway, if that is not responsive the HA node assumes it is no longer on the network and isolates itself (by default powering down all of it's VMs). So in the case where you have a two node HA cluster and the gateway does not respond to icmp, if one node fails, the other thinks it is off the network as well and the whole environment goes down.
To address this, you can either enable icmp response to the service consoles (like you have), or you can specify another address for the HA nodes to try when verifying their network connectivity (aka the isolation address).
To set the isolation address, go into the "Advanced Options" within the VMware HA settings enter das.isolationaddress[/b] for the value and
enter the desired IP Address for the value. Click OK to save the settings and reconfigure the HA settings on all of the nodes to update their configuration.
Now, an HA node will ping the das.isolationaddress when it can no longer communicate with the other HA cluster nodes. If it gets a response it knows it's on the network, otherwise it goes into isolation mode.
