Enterasys SmartSwitch 6000, User Manual

Page: 78 / 231

Managing the Module 2-59
The Device View
To assign a transmit priority to a port:
1. Click to highlight the port interface of interest in the Port # column. Each
interface is identified by its MIBII
IfIndex .
2. Click on the Transmit Priority drop-down list box, and scroll to select the
desired priority level (Normal–7) for forwarding packets received on the
selected port.
3. Click the Apply button. The defined priority will appear next to the port in the
Transmit Priority column.
Configuring Priority Queuing Based on MAC-layer Information
You can use the MAC Based Priority Configuration window, Figure 2-21 ,
to determine packet queuing based upon the packet’s Source and/or
Destination MAC address, as well as the packet’s frame Type. These priority entries,
based on the frame’s MAC-layer information, are maintained in the
ctPriorityExtMACTable. You can create up to 1024 priority entries for queuing frames
based upon on MAC-layer information.
NOTE
Since the SmartSwitch 6000 and Matrix E7 modules have two transmit queues, a priority
of Normal will cause packets received on that port to be forwarded through the lower
priority queue, and any priority of 1 through 7 will cause the packets to be forwarded
through the higher priority queue. However, other tag-aware switches may use the full
range of eight priority queues — so the priority that you assign may have bearing on how
the frame is forwarded when it is received by another device.