Network Configuration - NS120

Hi Dandrys,

Since your ESXi hosts only have a single NIC connection to switch, so there is a single point of failure in the network.

Back to your question, a LACP is a high-availability feature that enables multiple active Ethernet connections to the same switch to appear as a single link with a single MAC address and potentially multiple IP addresses, it provides link-level redundancy.

A Fail-Safe Network (FSN) is a high-availability feature that extends link failover into the network by providing switch-level redundancy.

So FSN is safer than LACP, meanwhile, FSN will occupies more ports than LACP. I hope this answer can help you.

I don't understand how FSN occupies more ports than LACP ?  Also LACP can be connected to different switches as long as they are either stacked or support vPC.

I would use LACP because with FSN one devices is always standby so you can't take advantage of that extra bandwidth.

Yes, FSN might use single Gigabit Ethernet port or Ethernet channel port. If you use single gigabit Ethernet port, FSN will not occupy more ports than LACP. Dynamox is right, You can optionally configure one of the connections as primary in a FSN. The Data Mover always uses the primary connection, if available. If the primary connection fails, the Data Mover automatically switches to one of the standby connections.

If a FSN uses an Ethernet channel or link aggregation as a connection, the FSN fails over only when the entire channel or aggregation fails. So if you require more safer, i suggest Dandrys can use 4 ports to configure LACP.