HP ProCurve 6120G/XG Configuration Manual page 332

Port Traffic Controls
Guaranteed Minimum Bandwidth (GMB)
Syntax: [ no ] int < port-list > bandwidth-min output
12-14
Configures the default minimum bandwidth allocation for
the outbound priority queue for each port in < port-list >.
The default values per priority queue are:
• Queue 1 (low priority): 2%
• Queue 2 (low priority): 3%
• Queue 3 (normal priority): 30%
• Queue 4 (normal priority): 10%
• Queue 5 (medium priority): 10%
• Queue 6 (medium priority): 10%
• Queue 7 (high priority): 15%
• Queue 8 (high priority): 20%
The no form of the command disables GMB for all ports in
< port-list >. In this state, which is the equivalent of setting
all outbound queues on a port to 0 (zero), a high level of
higher-priority traffic can starve lower-priority queues,
which can slow or halt lower-priority traffic in the
network. You can configure bandwidth minimums from
either the global configuration level (as shown above) or
from the port context level. For information on outbound
port queues, refer to table 12-1, "Per-Port Outbound
Priority Queues" on page 12-11.