Port priority and rate limiting configuration, Port priority configuration summary, Port priority configuration summary -1 – Enterasys Networks Enterasys D2 D2G124-12P User Manual

Page 319: Chapter 10

Advertising
background image

D-Series CLI Reference 10-1

10

Port Priority and Rate Limiting Configuration

This chapter describes the Port Priority and Rate Limiting set of commands and how to use them. 

Port Priority Configuration Summary

The D‐Series device supports Class of Service (CoS), which allows you to assign mission‐critical 
data to higher priority through the device by delaying less critical traffic during periods of 
congestion. The higher priority traffic through the device is serviced first before lower priority 
traffic. The Class of Service capability of the device is implemented by a priority queueing 
mechanism. Class of Service is based on the IEEE 802.1D (802.1p) standard specification, and 
allows you to define eight priorities (0 through 7) and assign them to transmit queues for each 
port.

A priority 0 through 7 can be set on each port, with 0 being the lowest priority. A port receiving a 
frame without priority information in its tag header is assigned a priority according to the default 
priority setting on the port. For example, if the priority of a port is set to 4, the frames received 
through that port without a priority indicated in their tag header are classified as a priority 4 and 
transmitted according to that priority. In addition, the device’s rate limiting capabilities allow you 
to further prioritize traffic by limiting the rate of inbound traffic on a per port/priority basis.

For information about...

Refer to page...

Port Priority Configuration Summary

10-1

Configuring Port Priority

10-2

Configuring Priority to Transmit Queue Mapping

10-4

Configuring Quality of Service (QoS)

10-6

Configuring Port Traffic Rate Limiting

10-9

Note: When CoS override is enabled using the set policy profile command as described in “

set

policy profile

” on page 9-4, CoS-based classification rules will take precedence over priority

settings configured with the set port priority command described in this section.

Advertising
This manual is related to the following products: