User manual

C HAPTER 11 | Class of Service
Layer 2 Queue Settings
– 130 –
ES-2000 Series
The priority levels recommended in the IEEE 802.1p standard for various
network applications are shown in Tab le 1 3 . However, priority levels can be
mapped to the switch’s output queues in any way that benefits application
traffic for the network.
COMMAND USAGE
◆ Egress packets are placed into the hardware queues according to the
mapping defined by this command.
◆ The default internal PHB to output queue mapping is shown below.
◆ The specified mapping applies to all interfaces.
PARAMETERS
These parameters are displayed:
◆ PHB – Per-hop behavior, or the priority used for this router hop.
(Range: 0-7, where 7 is the highest priority)
◆ Queue – Output queue buffer. (Range: 0-3, where 3 is the highest CoS
priority queue)
Table 13: CoS Priority Levels
Priority Level Traffic Type
1 Background
2(Spare)
0 (default) Best Effort
3 Excellent Effort
4 Controlled Load
5 Video, less than 100 milliseconds latency and jitter
6 Voice, less than 10 milliseconds latency and jitter
7Network Control
Table 14: Mapping Internal Per-hop Behavior to Hardware Queues
Per-hop Behavior 0 1 2 3 4 5 6 7
Hardware Queues 1 0 0 1 2 2 3 3