Product information and planning
MPR-e 165
Figure 57: QoS in the MPT
The QoS feature provides eight internal queues to support different traffic priorities. The QoS
function assigns the packet to one of the eight egress transmit queues.
• Queue 8 is assigned to TDM2TDM traffic (not used in the current release)
• Queue 7 is assigned to TDM2Eth traffic
• Queue 6 is assigned to TMN
Queues 1 to 5 are assigned to Ethernet traffic according to the information inside the packet
as 802.1p field, DiffServ field or Ethertype.
All the MEF-8 ETH2ETH traffic flows are assigned to the Q5 egress priority queue.
QoS based on IEEE std. 802.1p
When the 802.1p QoS mechanism is adopted, the reference is the standard “IEEE 802.1D-
2004 Annex G User priorities and traffic classes”, which defines eight traffic types and the
corresponding user priority values.
In the Radio Interface module for generic Ethernet traffic, there are five egress queues;
therefore, the mapping of the 802.1p value to a queue is as shown in
Table 72: QoS based on 802.1p priority
802.1p priority Queue
111, 110 Q5 (higher priority)
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