Advanced Configuration Features
35
Horizon Compact Release 1.01.00 Wireless Ethernet Product User Manual – Volume 2
Example 1: Queues configured with the following settings :
• QUEUE 4 = 100%
• QUEUE 3 = 100%
• QUEUE 2 = 75%
• QUEUE 1 = 25%
• In this example, voice traffic could be assigned to QUEUE 4, IPTV could be assigned to
QUEUE 3, Database transfers assigned to QUEUE 2, and Internet traffic assigned to QUEUE
1
• QUEUE 4 is serviced as a priority Queue until empty
• QUEUE 3 is serviced as a priority Queue until empty or until QUEUE 4 receives packet
• If neither QUEUE 4 or QUEUE 3 have packets, service QUEUE 2 until empty or CIR limit is
met, or until QUEUE 4 or QUEUE 3 packets arrive
• Service QUEUE 1 when no other packets exist in QUEUE 4, QUEUE 3, QUEUE 2 and
QUEUE 1 CIR limit has not been met
Example 2: Assuming that the total bandwidth available is 200Mbps, if the Expedite Queue is “ON” and
the CIR for the remaining Queues are set to:
• QUEUE 4 = 100%
• QUEUE 3 = 100%
• QUEUE 2 = 0%
• QUEUE 1 = 0%
In this scenario, with Expedite Queue “on” and QUEUE 4 set to 100%, QUEUE 4 will be given priority
access to the full bandwidth available on the link.
Once QUEUE 4’s throughput requirements have been satisfied, 100% of any remaining bandwidth
will be given to QUEUE 3.
Will allow the user to set the system up with a “prioritized Expedite Queue” configuration, whereby
QUEUE 4 gets full bandwidth until satisfied, and then QUEUE 3 gets100% of what is left over. (useful
in applications where 2 types of “high priority traffic” need to be serviced)
Note that in this example untagged traffic or traffic assigned to Queues 1 or 2 will not be transmitted
due to QUEUE 1 being set to 0% CIR.
Example 3: Assuming that the total bandwidth available is 200Mbps, if the Expedite Queue is “ON” and
the CIR for the remaining Queues are set to:
• QUEUE 4 = 100%
• QUEUE 3 = 50%
• QUEUE 2 = 50%
• QUEUE 1 = 100%
In this scenario, with Expedite Queue “on”, and QUEUE 4/QUEUE 1 set to 100%, QUEUE 4 will be
given priority access to the full bandwidth available on the link (200Mbps). When its traffic
commitments have been met, QUEUE 1 will then be given the remaining available bandwidth to
service its incoming traffic. Once QUEUE 4 and QUEUE 1’s requirements have been met, QUEUE 3
will be serviced by the scheduler up to but not beyond its CIR limit (should any bandwidth be
available). Once QUEUE 4, QUEUE 1 and QUEUE 3 have been serviced, QUEUE 2 will receive any
remaining bandwidth to service its incoming traffic.
Example: QUEUE 4 and QUEUE 1 each have 70Mbps of traffic to service (140Mbps). The
scheduler first handles QUEUE 4’s requirements, then QUEUE 1’s, which leaves 60Mbps of
bandwidth available for QUEUE 3 and QUEUE 2. If QUEUE 3 and QUEUE 2 both have 50Mbps of
incoming traffic, the scheduler will service QUEUE 3 first, up to but not beyond its CIR limit of
50Mbps. The remaining 10Mbps will be dedicated to QUEUE 2 as long as no packets arrive in
QUEUE 4 or QUEUE 1.
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