In a Disjoint Layer 2 configuration, traffic is split between two or more different networks at the FI to support two or more discrete Ethernet clouds.
Disjoint Layer 2 on the FI must be configured on ports that are not used for the standard LAN uplink traffic. On third-generation Cisco UCS 6300 Series Fabric Interconnects, the network cables can be any of the following:
On the fourth-generation Cisco UCS 6454 Fabric Interconnects, the network cables can be any of the following:
Cisco UCS servers connect to two or more Ethernet different clouds that never connect. Upstream Disjoint Layer 2 networks allow servers or VMs located in the same Cisco UCS domain access to the clouds.
The following figure provides an example of Disjoint Layer 2 networking into a Cisco UCS domain:
vPCs 101 and 102 are production uplinks that connect to the network layer of the Converged System. vPCs 105 and 106 are external uplinks that connect to other switches.
Disjoint Layer 2 network connectivity can also be configured with an individual uplink on each FI.