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header of a packet to see if it has the proper identify ing tag tagged. Then the
user may forward these tagged packets to designated queues on the Switch
where they will be e mpt ied, based on priority.
Untagged packets will be treated as priority 0 (i.e . c lass 1).
Understanding QoS
The Switch has four priority queues. These priority queues are labeled as 3, the
high queue to 0, the lowest queue. The e ight priority tags, specified in IEEE
802.1p are mapped to the Switch's priority tags as follows:
•
Priority 0 is assigned to the Switch's Q1 queue.
•
Priority 1 is assigned to the Switch's Q0 queue.
•
Priority 2 is assigned to the Switch's Q0 queue.
•
Priority 3 is assigned to the Switch's Q1 queue.
•
Priority 4 is assigned to the Switch's Q2 queue.
•
Priority 5 is assigned to the Switch's Q2 queue.
•
Priority 6 is assigned to the Switch's Q3 queue.
•
Priority 7 is assigned to the Switch's Q3 queue.
The Switch uses strict priority for Scheduling. Strict priority-based scheduling,
any packets residing in the higher priority queues are transmitted first.
D-Link Green Ethernet Technology
D-Link Green Ethernet imp le ments special power-saving features under speed
at 1000Mbps that detect cable length and link status and adjust power usage
accordingly.
Green Ethernet Technology saves energy in two specific ways:
Method 1: If there is no link on a port, such as when there is no computer
connected to the port or the connected computer is powered off, Green
Ethernet Technology will enter a "sleep mode", drastically reducing power
used for that port.