Extreme Networks Summit Summit1 Installation And User Manual page 104

Q S (Q S)
UALITY OF ERVICE O
Q S M
O ODE
The QoS mode for the Switch determines with which types of trafÞc classiÞcations the
Switch will be dealing, explicit or implicit. The default is implicit. If you want to change
the QoS mode, it requires performing the change, saving the conÞguration, and
rebooting the Switch.
In the explicit mode, the selection of QoS proÞles is Þxed and cannot be modiÞed
because it is based only on priority. In the implicit mode, QoS proÞles, in addition to a
single proÞle that is provided, may be created and include the capability to adjust
bandwidth parameters.
Q S P
O ROFILES
Depending upon the QoS mode chosen, QoS proÞles can be Þxed (as with explicit
mode) or can be created (as with implicit mode) and contain bandwidth and priority
parameters. Unless otherwise noted, a QoS proÞle can then be assigned to a speciÞc
trafÞc classiÞcation (such as a port or VLAN). If a QoS proÞle is assigned to multiple
trafÞc classiÞcations, those classiÞcations share the same Quality of Service if the trafÞc
shares the same physical ports.
The parameters that make up a QoS proÞle include the following:
¥ Minimum bandwidth Ñ The minimum percentage of bandwidth that this queue
requires. The Switch is required to provide the minimum amount of bandwidth to
the queue. The lowest possible value is 0%.
¥ Maximum bandwidth Ñ The maximum percentage of bandwidth that this queue is
permitted to use.
¥ Priority Ñ The level of priority in which this queue will be serviced by the Switch.
Choices include:
Ñ Low
Ñ Normal
Ñ Medium
Ñ High
A QoS proÞle does not alter the behavior of the Switch until it is assigned to a trafÞc
classiÞcation.
8-2 S S I
UMMIT WITCH NSTALLATION AND
U G
SER UIDE