Web Management Guide-R02

Table Of Contents
Chapter 9
| Class of Service
Layer 3/4 Priority Settings
– 259 –
Command Usage
Enter per-hop behavior and drop precedence for any of the IP Precedence
values 0 - 7.
If the priority mapping mode is set the IP Precedence and the ingress packet
type is IPv4, then the IP Precedence-to-PHB/Drop Precedence mapping table is
used to generate priority and drop precedence values for internal processing.
Random Early Detection starts dropping yellow and red packets when the
buffer fills up to 0x60 packets, and then starts dropping any packets regardless
of color when the buffer fills up to 0x80 packets.
Parameters
These parameters are displayed in the web interface:
Interface – Specifies a port or trunk.
IP Precedence – IP Precedence value in ingress packets.
(Range: 0-7)
PHB – Per-hop behavior, or the priority used for this router hop. (Range: 0-7)
Drop Precedence – Drop precedence used for Random Early Detection in
controlling traffic congestion. (Range: 0 - Green, 3 - Yellow, 1 - Red)
Web Interface
To map IP Precedence to internal PHB/drop precedence in the web interface:
1. Click Traffic, Priority, IP Precedence to DSCP.
1. Select Configure from the Action list.
4Flash Override
3Flash
2 Immediate
1Priority
0Routine
Table 19: Default Mapping of IP Precedence to Internal PHB/Drop Values
IP Precedence Value 0 1 2 3 4 5 6 7
Per-hop Behavior 0 1 2 3 4 5 6 7
Drop Precedence 0 0 0 0 0 0 0 0
Table 18: Mapping IP Precedence
Priority Level Traffic Type