Management console is just a virtual machine, so you need to configure redundant access, not redundant consoles.
You can do it 2 ways:
- add new console interface
- add new physical interface to existsing console interface providing multiple physical paths.
I suggest you to choose second way. You can even add NIC used for VM Network as standby, so normally traffic from COS and VMs won't mix, but you'll still have COS connection if usual COS NIC fails.
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