Class-Of-Service - Dell PowerConnect 2124 Guide D'utilisation

18 Introduction

Class-of-Service

The switch supports tag-based prioritization following the IEEE 802.1p
standard. The eight levels of IEEE 802.1p priority are mapped to the four
priority queues of each port. For each port, the four priority queues are
scheduled following a Weighted Round Robin scheme.
IEEE 802.1p Priority
1,2
0,3
4,5
6,7
NOTE: The IEEE 802.1p priority information is part of the IEEE 802.1q tag
that also defines VLAN memberships. The switches will ignore the VLAN
membership information in the tag (i.e. all ports are part of all VLANs), but
will preserve the full tag information—including packet priority and
VLAN ID—when transmitting the packet at the destination port.
Gigabit Link
Priority Queue
0
1
2
3
Scheduling Weight
4
16
64
255