Compute layer

Cisco UCS third and fourth-generation components provide compute power in the VxBlock System 1000.

The following table lists Cisco Nexus and Cisco UCS components:
Component Description
Cisco UCS 5108 Blade Server Chassis Cisco UCS Manager manages the 6U blade server chassis that houses FIs, FEX, and servers.
Cisco UCS B-Series Blade Servers Includes B200 or B480, M4, or M5 servers. Cisco UCS VICs 1340, 1380, 1440, or 1480 provide connectivity
Cisco UCS C-Series Rack Servers Includes C220, C240, or C480, M4, or M5 servers. Cisco UCS VICs 1385, 1387, 1455, 1457, 1495, or 1497 provide connectivity.
Third-generation Cisco UCS 6332-16UP Fabric Interconnects
  • Provides 6 x 40 Gbps uplink ports
  • Provides 26 x 40 Gbps downlink ports
  • Provides 8, 12, or 16 FC connections
Third-generation Cisco UCS 2304XP or 2304V2XP Fabric Extender Provides up to 4 x 40 GbE connections between blade server chassis and FIs
Third-generation Cisco Nexus 2348UPQ Fabric Extender Provides 48 x 1 GbE or 10 GbE and unified port host interfaces (SFP+) and up to six QSFP+ uplink interfaces that operate at 10 GbE or 40 GbE
Fourth-generation Cisco UCS 6454 Fabric Interconnects
  • Contains 2 Gbps, 4 Gbps, or 6 100 Gbps uplinks
  • Configured with 8 or 16 FC connections per FI
Fourth-generation Cisco UCS 64108 Fabric Interconnects
  • Contains four, six, or eight 100 Gbps uplinks
  • Configured with 8 or 16 FC connections per FI
Fourth-generation Cisco UCS 2408, 2204XP, or 2208XP Fabric Extender Connects the I/O fabric between the Cisco UCS 6454 Fabric Interconnect and the Cisco UCS 5108 Blade Server Chassis. The Cisco UCS 64108 Fabric Interconnect supports only the Cisco UCS 2408 Fabric Extender.
Fourth-generation Cisco Nexus 2232PP Fabric Extender Provides 32 x 10 GbE and FCoE SFP+ server ports and 8 x 10 GbE and FCoE SFP+ uplink ports in a compact, 1U form factor

Each FI reserves multiple ports to connect Cisco SAN switches and carry FC traffic between the compute layer and the storage layer. SAN port channels carry FC traffic between the FIs and upstream Cisco MDS switches. The FEX within the blade server chassis connect to FIs over converged networking. By default, servers in the VxBlock 1000 boot VMware vSphere ESXi from local mirrored SD cards. Booting from SAN is optional.

Regardless of the number of blade servers in the blade server chassis, the FEX connect northbound to the FIs with:
  • Two or four Cisco UCS third generation 40 GbE connections
  • Four or eight Cisco UCS fourth generation 10 GbE connections
The Cisco UCS 2408 Fabric Extender has eight external 25 Gb ports and 32 internal 10 Gb ports. Each FEX connects northbound to the FIs, regardless of the number of blade servers in the blade server chassis. The Cisco UCS 2408 Fabric Extender works with the Cisco UCS 6454 or 64108 Fabric Interconnect at 25 Gbps.
Cisco UCS C-Series Rack Servers connect directly to the following ports:
  • Cisco UCS 6332-16UP Fabric Interconnects
  • Cisco UCS 6454 Fabric Interconnects
  • Cisco UCS 64108 Fabric Interconnects

Use a pair of Cisco Nexus 2000 Series Fabric Extenders to increase the scale for Cisco UCS C-Series Rack Servers on Cisco UCS 6332-16UP Fabric Interconnects. The Cisco UCS 6454 Fabric Interconnects can use a pair of Cisco Nexus 2232PP Fabric Extenders to increase the scale of Cisco UCS C-Series Rack Servers. These connections carry IP and FC traffic. The Cisco UCS 64108 Fabric Interconnects do not have a supported FEX for rack mount.

NOTE: FEX connectivity is supported only with Cisco UCS third-generation fabric interconnects. VxBlock System builds do not support Cisco UCS C-Series Rack Servers that are FEX connected.