Configuration of Class of Service (CoS) to Traffic Forwarding Queue mapping on RV220W and RV120W

Objective

Class of Service (CoS) is a 3 bit field in an ethernet frame header when a VLAN tag is present. Quality of Service uses the CoS value to differentiate and police network traffic. This field specifies a priority value between 0 and 7, inclusive, that can be used by Quality of Service (QoS) to differentiate traffic. You can map Class of Service (CoS) priority settings to the traffic forwarding queue. Traffic queue are ‘‘normal’’ priority and ‘‘high’’ priority. (High-priority packets leave the device port first. Normal-priority packets leave the switch port after the high-priority queue is emptied.) With no CoS control, all traffic goes through the ‘‘normal’’ outbound port queues. However, with a CoS policy operating in your network, you can determine the outbound priority queue to which a packet is sent.

This document explains the selection of queue values for the packet such as lowest, low, medium or high for the corresponding Class of Service (CoS) values on the Cisco RV220W and RV120W.

Applicable Devices

• RV220W
• RV120W

Software Version

• v1.0.4.17

CoS to Traffic Forwarding Queue Configuration

Step 1. Log in to the web configuration utility and choose QoS > CoS Settings > CoS Settings. The CoS Settings page opens:

Step 2. Check the Enable check box to enable CoS to Queue mapping.

The CoS Priority page under CoS to Traffic Forwarding Queue Mapping Table gives the CoS priorities ranging from priority 0 to priority 7.

• Priority 0 — Background

• Priority 1 — Best Effort

• Priority 2 — Excellent Effort

• Priority 3 — Critical Applications

• Priority 4 — Video

• Priority 5 — Voice

• Priority 6 — Internetwork Control

• Priority 7 — Network Control

Step 3. Choose the appropriate queue value from the drop-down list under the Traffic Forwarding Queue page for the corresponding CoS priority.

• 1 (Lowest) — Packet gets the lowest priority.

• 2 — Packet gets a low priority.

• 3 — Packet gets a medium priority.

• 4 (Highest) — Packet gets the highest priority.

Step 4. Click Save to save the settings.