User manual
15
3 Broadcast&Multicast only;
4 Broadcasts only
―----‖ stands for no limitation, the rate of low priority queues
（
L
）
can be set as :128k, 256k, 512k, 1M, 2M,
4M, 8M.The rate of normal priority queues
（
N
）
is 1 or 2 times as wide as that of low priority queues. The rate of
medium priority queues
（
M
）
is 1 or 2 times as wide as that of normal one. The rate of high priority queues is 1 or
2 times as wide as that of medium one.
For example, the rate of low priority queues is 256k, and then the rate of normal priority queues can be set for
256k or 512k. Detailed operating as shown in Figure 56.4
（
Figure 5.5.4
）
Type
Low
Norm
Medium
High
Type
All frames
----
Broadcast, Multicast or
unicast frames
Broadcast&Multicast only
Broadcast only
The ingress rate is related to CoS priority. Priority Queue is based on QoS setting (the same as QoS assorted
setting includes checking CoS priority), or ingress rate will be based on default. CoS priority includes 4 queues:
Low
，
Normal
，
Medium
，
High.
Operation method:
1. Choice 2 port at first, for example open the COS priority of port 4 and port 5, please according to 6.5 part
2. Then set port 4‘s CoS is High, port 5‘s CoS is LOW in COS mapping setting interface
3. Last set the type of limit package and bandwidth of priority queue in Ingress bandwidth configuration
For example, keep up step 1 and 2, choice ―All frame‖ in port 4 and 5 at step 3. Set 2M in all low priority queue
：
