Black Box LBG1000A, Manual

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Class-of-Service (CoS) Support
The LBG1000A switch provides four transmit queues on each port, with a weighted round-robin scheme. These
functions can be used to provide independent priorities for various types of data including real-time video, real-time
voice, and best-effort data.
Priority assignment to packet-based switches is accomplished through explicit assignment by end stations, which
have applications that require a higher priority than best-effort data. This mechanism utilizes the IEEE802.1p and
802.1Q tag structure, which the switch uses to decide priority assignments for the received packets.
GVRP
In addition to network management tools that allow network administrators to statically add and delete VLAN
member ports, the routing switch supports GARP VLAN Registration Protocol (GVRP). GVRP supports dynamic
registration of VLAN port members within a switch and across multiple switches.
In addition to dynamically updating registration entries within a switch, GVRP is used to communicate VLAN
registration information to other VLAN-aware switches, so that members of a VLAN can cover a wide span of
switches on a network.
GVRP allows both VLAN-aware workstations and switches to issue and revoke VLAN memberships. VLAN-
aware switches register and propagate VLAN membership to all ports that are part of the active topology of the
VLAN.