Mapping Cos Values To Egress Queues; Table 3-12 Egress Queue Priority Mapping; Table 3-13 Cos Priority Levels - SMC Networks 8124PL2 - annexe 1 Management Manual

CLI – This example assigns a default priority of 5 to port 3.
Console(config)#interface ethernet 1/3
Console(config-if)#switchport priority default 5
Console(config-if)#end
Console#show interfaces switchport ethernet 1/3
Information of Eth 1/3
Broadcast threshold:
LACP status:
Ingress rate limit: enable, K bits per second: 25
VLAN membership mode:
Ingress rule:
Acceptable frame type:
Native VLAN:
Priority for untagged traffic: 5
GVRP status:
Allowed VLAN:
Forbidden VLAN:
Private-VLAN mode:
Private-VLAN host-association: NONE
Private-VLAN mapping:
Console#

Mapping CoS Values to Egress Queues

This switch processes Class of Service (CoS) priority tagged traffic by using eight
priority queues for each port, with service schedules based on strict or Weighted
Round Robin (WRR). Up to eight separate traffic priorities are defined in IEEE
802.1p. The default priority levels are assigned according to recommendations in
the IEEE 802.1p standard as shown in the following table.
Queue
Priority
The priority levels recommended in the IEEE 802.1p standard for various network
applications are shown in the following table. However, you can map the priority
levels to the switch's output queues in any way that benefits application traffic for
your own network.
Priority Level
1
2
0 (default)
3
4
5
Enabled, 500 packets/second
Disabled
Hybrid
Enabled
All frames
1
Disabled
1(u),
NONE
NONE

Table 3-12 Egress Queue Priority Mapping

0 1
1,2 0,3

Table 3-13 CoS Priority Levels

Traffic Type
Background
(Spare)
Best Effort
Excellent Effort
Controlled Load
Video, less than 100 milliseconds latency and jitter
Class of Service Configuration
2 3
4,5 6,7
4-111
4-170
4-119
3-147