ECS4660-28F_Management Guide-R03

C HAPTER 10 | Class of Service
Layer 3/4 Priority Settings
– 318 –
To show the CoS/CFI to internal PHB/drop precedence map:
1. Click Traffic, Priority, CoS to DSCP.
2. Select Show from the Action list.
3. Select a port.
Figure 143: Showing CoS to DSCP Internal Mapping
MAPPING INTERNAL
DSCP VALUES TO
EGRESS COS VALUES
Use the Traffic > Priority > DSCP to CoS page to map internal per-hop
behavior and drop precedence value pairs to CoS values used in tagged
egress packets on a Layer 2 interface.
CLI REFERENCES
◆ "qos map dscp-cos" on page 1395
COMMAND USAGE
◆ Enter any per-hop behavior and drop precedence pair within the
internal priority map, and then enter the corresponding CoS/CFI pair.
◆ If the packet is forwarded with an 8021.Q tag, the priority value in the
egress packet is modified based on the default values shown in
Table 19 on page 319, or on the values modified by this function.
PARAMETERS
These parameters are displayed in the web interface:
◆ Port – Specifies a port.
◆ PHB – Per-hop behavior, or the priority used for this router hop.
(Range: 0-7)
◆ Drop Precedence – Drop precedence used for controlling traffic
congestion. (Range: 0 - Green, 3 - Yellow, 1 - Red)