Switches - HP ProCurve 6400cl Series Management And Configuration Manual

Guaranteed Minimum Bandwidth (GMB) on the Series 5300xl Switches
Guaranteed Minimum Bandwidth (GMB)
on the Series 5300xl Switches
This section applies only to the Series 5300xl switches.
Feature
bandwidth-min output
show bandwidth output [ port-list ]
Introduction
Guaranteed Minimum Bandwidth (GMB) provides a method for ensuring that
each of a given port's outbound traffic priority queues has a specified mini-
mum consideration for sending traffic out on the link to another device. This
can prevent a condition where applications generating lower-priority traffic
in the network are frequently or continually "starved" by high volumes of
higher-priority traffic. You can configure GMB per-port or per-trunk.
Terminology
Oversubscribed Queue: The condition where there is insufficient bandwidth
allocated to a particular outbound priority queue for a given port. If additional,
unused bandwidth is not available, the port delays or drops the excess traffic.
GMB Operation
The switch services per-port outbound traffic in a descending order of priority;
that is, from the highest priority to the lowest priority. Each port offers four
prioritized, outbound traffic queues. Tagged VLAN traffic is prioritized accord­
ing to the 802.1p priority the traffic carries. Untagged VLAN traffic is assigned
a priority of "0" (normal).
Default Menu
Per-Queue: n/a
8%-16%-30%-45%
n/a n/a
Port Traffic Controls
CLI Web
page 13-11 n/a
page 13-9 n/a
13-9