A named VSAN creates a connection to a specific external SAN. The VSAN isolates traffic to that external SAN, including broadcast traffic. The traffic on one named VSAN knows that the traffic on another named VSAN exists, but cannot read or access that traffic.
Like a named VLAN, the name that you assign to a VSAN ID adds a layer of abstraction that allows you to globally update all servers associated with service profiles that use the named VSAN. You do not need to reconfigure the servers individually to maintain communication with the external SAN. You can create more than one named VSAN with the same VSAN ID.
In a cluster configuration, a named VSAN can be configured to be accessible only to the FC uplinks on one fabric interconnect or to the FC Uplinks on both fabric interconnects.
Creating a Named VSAN Accessible to Both Fabric Interconnects
You can create a named VSAN with IDs from 1 to 4093.
If Cisco UCS Manager includes a named VSAN with the same VSAN ID as the one you delete, the VSAN is not removed from the fabric interconnect configuration until all named VSANs with that ID are deleted.
Command or Action
UCS-A# scope eth-uplink
Enters Ethernet uplink mode.
UCS-A /fc-uplink # delete vsanvsan-name
Deletes the specified named VSAN.
UCS-A /fc-uplink # commit-buffer
Commits the transaction to the system configuration.
The following example deletes a named VSAN and commits the transaction: