DragonWave Inc. 32
Horizon Compact Release 1.01.00 Wireless Ethernet Product User Manual – Volume 2
There are three additional Horizon Compact settings that can be used to customize the data flow to
match network requirements:
1. CoS Committed Information Rate (CIR), which determines the guaranteed bandwidth allocated to
a particular Queue.
2. CoS Committed Burst Size, which determines the amount of burst data the Queue can manage.
3. Expedite Queuing (see Section
3.3.4), which allows a Queue to be set as a priority Queue
whereby it delivers its data at the expense of other non-Expedite Queues.
A representative drawing of the QoS components and functional blocks is shown in
Figure 3-2. Note that
Queue 4 is shown as being configured as an expedite queue (recommended if only one expedite queue
is desired). Any, or all, of the four queues can be configured as expedite queues.
Figure 3-2 CoS Queues can be allocated a CIR and a Committed Burst Size.
3.3.1 Class of Service Types
Horizon Compact has the flexibility to manage the priority requirements of Super VLAN or Q-in-Q framing
as well as standard VLAN frames. Horizon Compact can be configured to manage standard VLAN
frames, or Q-in-Q frames.
For Q-in-Q frames, since a standard VLAN frame is encapsulated within the Q-in-Q frame, there may be
two priority levels associated with the Q-in-Q frame. One will be the priority of the encapsulated, or inner,
VLAN frame and the other will be the priority of the Q-in-Q, or outer, frame. The Horizon Compact class of
service type can be configured to look at the priority levels of either, the inner, or outer, frames and direct
frames to the appropriate Horizon Compact queue.
Frame Filter
Frame Filter
Queue 1
Queue 2
Queue 3
Queue 4
(Expedite Queue)
%n
%n
%n
%n
Rate
Limit
n
Mbps
Ethernet
Frames
In
Ethernet
Frames
Out
CIR
for each
Queue
n
Depends
on AirPair
type and
radio
band
Committed Burst Size
NMS
set filter
Parameters
n
depends on
licensed
speed &
system mode
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