TRENDnet TI-PG541i User Manual page 35

TRENDnet User's Guide
Queuing Algorithms
Queuing algorithms allow switches to maintain separate queues for packets from each
individual source or flow and prevent a source from monopolizing the bandwidth.

Strict-Priority (SPQ)
The packets on the high priority queue are always service firstly.

Weighted round robin (WRR)
Round Robin scheduling services queues on a rotating basis and is activated only
when a port has more traffic than it can handle. A queue is given an amount of
bandwidth irrespective of the incoming traffic on that port. This queue then moves
to the back of the list. The next queue is given an equal amount of bandwidth, and
then moves to the end of the list; and so on, depending on the number of queues
being used. This works in a looping fashion until a queue is empty.
Weighted Round Robin (WRR) scheduling uses the same algorithm as round robin
scheduling, but services queues based on their priority and queue weight (the
number you configure in the queue Weight field) rather than a fixed amount of
bandwidth. WRR is activated only when a port has more traffic than it can handle.
Queues with larger weights get more service than queues with smaller weights. This
queuing mechanism is highly efficient in that it divides any available bandwidth
across the different traffic queues and returns to queues that have not yet emptied.
Default Settings
QoS mode : High First (SPQ)
The mappings of the Priority to Queue are:
PRIO 0 ==> COSQ 2
PRIO 1 ==> COSQ 0
PRIO 2 ==> COSQ 1
PRIO 3 ==> COSQ 3
PRIO 4 ==> COSQ 4
PRIO 5 ==> COSQ 5
PRIO 6 ==> COSQ 6
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PRIO 7 ==> COSQ 7
The DiffServ is disabled on the switch.
DSCP Priority DSCP Priority DSCP Priority DSCP
---- -------- ---- -------- ----
00 0 01 0 02 0
04 0 05 0 06 0
08 0 09 0 10 0
12 0 13 0 14 0
16 0 17 0 18 0
20 0 21 0 22 0
24 0 25 0 26 0
28 0 29 0 30 0
32 0 33 0 34 0
36 0 37 0 38 0
40 0 41 0 42 0
44 0 45 0 46 0
48 0 49 0 50 0
52 0 53 0 54 0
56 0 57 0 58 0
60 0 61 0 62 0
Note: If the DiffServ is disabled, the 802.1p tag priority will be used.
TI-PG541i
Priority
-------- ---- --------
03 0
07 0
11 0
15 0
19 0
23 0
27 0
31 0
35 0
39 0
43 0
47 0
51 0
55 0
59 0
63 0
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