HP ProCurve Series 3400cl Release Notes page 50

Enhancements
Releases M.08.90 and M.08.91 Enhancements
Note
Changing the QoS Pass-Through Mode can be done without rebooting the switch. However, the switch
ports are toggled down and back up, allowing the QoS queues to be reconfigured. This may affect
routing and spanning tree operation. ProCurve Networking recommends that QoS queues be recon-
figured during periods of non-peak traffic.
Configuring QoS Pass-Through Mode
Syntax: qos-passthrough-mode [ balanced | one-queue | optimized | typical ]
Specifies the QoS queue mode to be used by the switch. The number of queues and the
size of each queue is determined by the mode selected. If no mode is specified the optimized
mode is used. QoS Pass-Through is disabled using the no qos-pass-through command.
balanced: Configures four QoS queues of the same size. This configuration is the
same as was used by software versions prior to M.08.78.
one-queue: Configures one QoS queue. By consolidating packet buffer memory, line-
rate flows with no loss of data may be achieved.
Note: This mode has a small queue used exclusively by Priority 7 management
and control packets.
optimized: Configures two QoS queues: a small queue for Priority 6 and 7 traffic
and a large queue for all other traffic.
typical: Configures four QoS queues: a large queue for Priority 0 and 3 traffic, and
three other queues for the remaining traffic. This is the default configuration
on the switch and is used when QoS Pass-Through is disabled.
Syntax: [no] qos-passthrough-mode
Specifies the optimized QoS queue mode for the switch.
The no qos-pass-through command returns the QoS queue mode to typical, the default
setting.
Configuring QoS Pass-Through Mode Through the CLI. The following example changes the
QoS Pass-Through Mode to balanced. A show command verifies the new mode.
ProCurve(config)# qos-passthrough-mode balanced
This requires a temporary shut-down of logical ports. Continue (y/n) y
ProCurve(config)# show qos-passthrough-mode
Qos passthrough mode : balanced
ProCurve(config)#
Figure 1. Example Showing QoS Pass-Through Mode Set Using the CLI
40
Reconfiguring the
QoS queues toggles
the switch ports,
which may affect
routing and spanning
tree operation.
n
Choose to cancel
this operation.