Configuration of CoS/802.1p to Queue Mapping on ESW2-350G Switches

Objective

The Class of Service (CoS) / 802.1p mapping is used to classify the outgoing traffic at the egress port (outgoing port) based on the 802.1p priority in the VLAN ID tag. The incoming packets to the egress ports are then prioritized based on their assigned egress values or queue values (1 to 4).

This article explains how to map the output queue to the corresponding 802.1p priority levels on the ESW2-350G switches.

Applicable Devices

• ESW2-350G
• ESW2-350G-DC

Software Version

• 1.3.0.62

CoS/802.1p to Queue

Step 1. Log in to the web configuration utility to choose Quality of Service > General > CoS/802.1p to Queue. The CoS/802.1p to Queue page opens.

The CoS/802.1p to Queue Table contains the following information.

• 802.1p — Displays the 802.1p priority tag values to be assigned to an output queue, where 0 is the lowest and 7 is the highest priority.

— 0 – Used for data of the least prioritized tasks, like bulk transfers, games, etc.

— 1 – Used for the data which needs best-effort delivery on ordinary LAN priority. The network does not provide any guarantee on delivery, but the data obtains bit rate and delivery time based upon the traffic.

— 2 – Used for the data that needs best effort delivery for important users.

— 3 – Used for data of critical applications like a Linux Virtual Server (LVS) phone Session Initiation Protocol (SIP).

— 4 – Used for video with a latency and jitter less than 100 ms.

— 5 – Used for a Voice Cisco IP phone with latency and jitter less than 10 ms.

— 6 – Used for an inter-network control LVS phone Real-time Transport Protocol (RTP).

— 7 – Used for network control where the requirement to maintain and support the network infrastructure is high.

• Output Queue — Displays the egress queue to which the 802.1p priority is mapped.

Step 2. Choose the desired output queue for each 802.1p priority from the drop-down list under the Output Queue column of the CoS/802.1p to Queue Table. The drop-down list has four queues where Queue 4 is the highest priority output queue and Queue 1 is the lowest priority.

Step 3. Click Apply to save the settings.

Step 4. (Optional) Click Restore Defaults to restore the output queues to the default setting,