Table 1-2 Syntax Elements and Other Qualifying Information
ID Element	Definition		Back
N	Nodes (server nodes located in the CBBs, UBBs and UXRs).
Trunk	In a 1U format compute nodes that use a Gigabit Ethernet administrative network, pairs of ports are trunked together to create the link between branch switches and root switches. The combined ports are linked through component software, increasing the bandwidth of the connection. See Section 1.3 for more information.
CBB	Compute Building Block. Consisting of compute and/or visualization nodes; up to 38 1U nodes, up to 18 2U nodes, up to 9 4U nodes, and up to 8 5U nodes.
UBB	Utility Building Block. Includes the rack-mount KVM, root network switches, and bounded system interconnects.
UXR	Utility Expansion Building Block. Contains additional utility nodes when permitted by the configuration. Note that utility nodes, whether installed within the UBB or UXR, are labeled with UBB (these tables do not reflect the physical location within the UXR cabinet).
UVB	Primary cabinet for standalone SVA clusters and only used for standalone SVA clusters.  When the SVA solution is not connected to a Cluster Platform solution, this cabinet contains the Ethernet Root Switch, Optional TFT and KVM, Control Node, and High Speed Interconnect switch.  There is also room for workstations and other servers.
VBB	Visualization Building Block containing up to eight workstations but no Ethernet branch switch. For integration within a cluster platform, the workstations within the VBB connect direct to the ProCurve Ethernet switch within VBBa. When used within a standalone visualization cluster, the workstations within the VBB connect to the root switch located in the UVB.
VBBa or VBBb	There are two types of Visualization Building Blocks. Both contain up to eight workstations, but only VBBa contains ProCurve 2824 Administrative Ethernet Network branch switches.  Since one ProCurve 2824 supports up to two SVA cabinets, VBBb (also referred to as VBB) does not contain the branch switch.
AES	Administrative Ethernet Switch. Root switch(es) located in UBB. Branch switch located in CBBs.
CES	Console Ethernet Switch (branch switch included in CBBs, root switch in UBBs).
IES	Interconnect Ethernet Switch (located in the UBB in federated interconnect solutions).
NIC1	Embedded Ethernet Port. (The logical-first Ethernet port embedded on the server’s motherboard, generally 10/100/1000 Base-T. The server’s firmware identifies these ports logically as ethn to ethn.) NIC1 refers to the port with the lowest numbered label on the server.
NIC2	Embedded Ethernet Port. See the description for NIC1.