Hi, Werido!
Please try to configure as follows.
Step 1
Plan the IP address of the new gateway.
It is recommended for the uplink core switch to be in the same equipment room as the E9000.
Ensure that the new gateway can be pinged from the E9000 iBMC and FusionCompute management planes.
Step 2
Add a service management interface for the virtualized SAN storage heartbeat plane to the host.
A VLAN and a network segment need to be planned separately.
The VLAN and network segment must be configured firstly on the E9000 switch board and then in FusionCompute.
Step 3
Step 4
Change the gateway on the E9000 management portal and in FusionCompute.
I hope it is helpful for you.