Enterasys Networks 2H252, 2E253, 2H253, 2H258 manual Transmit Queues Configuration Screen

Transmit Queues Configuration Screen

4.To save and apply the settings to only the port shown on the screen, proceed to step 5. To save the Traffic Class selections and apply them to all front panel Ethernet ports, proceed to step 6.

5.Use the arrow keys to highlight the SAVE command at the bottom of the screen and press ENTER. The message “SAVED OK” displays and the settings are saved.

6.Use the arrow keys to highlight the SAVE TO ALL PORTS command at the bottom of the screen and press ENTER. The message “SAVED OK” displays and the settings are saved.

8.5TRANSMIT QUEUES CONFIGURATION SCREEN

When to Use

To configure the operational mode of the transmit queues to either STRICT 802.1 or WEIGHTED. This enables individual ports or all ports to be set to either transmit frames according to the priority transmit queues set in the Advanced Priority Configuration screen, or transmit frames according to a priority based on a percentage of the port transmission capacity allocated for each transmit queue.

In the STRICT 802.1 mode, frames are transmitted strictly according to the priorities set in the Advanced Priority Configuration screen. In this mode all frames with a transmit queue of Q3 are transmitted first, followed by those with transmit queue of Q2, then Q1, and finally Q0.

In the WEIGHTED mode, a percentage (weighted value) is user assigned to establish the amount of transmission capacity assigned to frames associated with each priority transmit queue

(Q0 through Q3 with Q0 being the lowest priority transmit queue). This allows the modification of the strict priority queues so that frames with the lower priority queue are guaranteed some access time to the transmitter.

For example, the transmit queues could be set as follows:

•Q3 to 50%, so at least 50% of the Q3 frames are transmitted.

•Q2 to 25%, so at least 25% of the Q2 frames are transmitted.

•Q1 to 25%, so at least 25% of the Q1 frames are transmitted.

•Q0 to 0%, no Q0 frames will be transmitted until Q3, Q2, and Q1 frames are transmitted.

8-12802.1p Configuration Menu Screens