AB291A Fabric Clustering System Support Guide (12-port Switch), April 2004

Glossary
VLAN
Glossary
299
Service Level Used for Quality of Service (QoS), a
Service Level (SL) specifies the desired service level
desired within a subnet. Service Levels are mapped
to Virtual Lane.
SM The Subnet Manager (SM) configures and
manages routers, switches, and channel adapters.
Multiple subnet managers per subnet are supported.
SMP Subnet Management Packet (SMP) on the
fabric.
SNMP Simple Network Management Protocol
(SMNP) lets a user define management information
base (MIB) extensions. SNMP agents access MIB
objects when requested by an SNMP Manager.
Target Channel Adapter The Target Channel
Adapter (TCA) is the complement to HCA. It is the
end node component of an I/O device that connects it
to the fabric.
TCA See Target Channel Adapter (TCA).
TCP Transmission Control Protocol (TCP).
TFTP Trivial File Transfer Protocol (TFTP) is a
simplified version of FTP that allows files to be
transferred from one computer to another over a
network, usually without the use of client
authentication (for example, username and
password).
Traps Unsolicted reports sent by SNMP agents to
interested clients. Trap messages are used to report
significant TCP/IP events asynchronously.
UDP An Internet protocol that provides
connectionless datagram delivery service to
applications. UDP over IP adds the ability to address
multiple endpoints to IP within a single network
node.
Unicast Analogous to PPP, unicast is a
communication link between a one sender and one
receiver. Unlike multicast, unicast is the serial
transmission of data between a sender and receiver.
Upper Layer Protocol (ULP) Any protocol
residing in OSI Layers five or above. Standard ULPs
supported by InfiniBand include Internet Protocol
(IPoIB) and Message Passing Interface (MPI).
VL Virtual Lane (VL) is a logical lane on the
data-link layer that transports packets across a
point-to-point link. Used in conjunction with Service
Levels.
VLAN Virtual LAN. Unlike conventional LANs, a
VLAN uses methods other than geographic location
to map workstations. This allows the administrator
to more easily manage load-balancing, band-width
allocation, and add new users.