Quality Of Service (Qos - Comtech EF Data CDM-760 Installation And Operation Manual

Appendix F
CDM-760 Advanced High-Speed Trunking Modem
specific route that the packet satisfies and has the largest mask (/30). If a packet comes in from
the WAN with a Destination IP Address of 192.168.2.5, it will be routed to 192.168.1.102 using
Route Index #2, as it does not satisfy the more specific Index #3 but does satisfy Route Indexes
#1 and #2, with #2 being more specific.
F.3.2

Quality of Service (QoS)

Appendix K. QUALITY
Quality of Service (QoS) ensures the highest quality of service with minimal jitter and latency for
real-time traffic, priority treatment of mission critical applications, and maximum bandwidth
efficiency.
The High-Speed Packet Processor offers a number of QoS configurations. The supported modes
of QoS are:
•
Max/Priority – This QoS mode provides multi-level traffic prioritization with the ability to
limit maximum traffic per priority class. Drain is based on strict priority, so highest priority
traffic will drain before a lower priority drains, either until it is empty or until it meets its
maximum data rate (Max DR). Similar to Max/Priority mode, Max/Priority with Weighting
provides multi-level traffic prioritization with the ability to limit maximum traffic per priority
class. It enables multiple rules with the same priority, where the drain can be biased rather
than Round-Robin. The configurable weight is a user-specified parameter ranging from 1 to
100; Scheduler will drain more data from a Weight=8 queue than a Weight=7 queue under
the same priority, until the Max is met.
• Min/Max – This mode provides a Committed Information Rate (CIR) to each user-defined
class of traffic with the ability to allow a higher burstable rate depending on availability.
Once the minimums are met, all Max rates are drained in a Round-Robin manner. Similar to
Min/Max mode, Min/Max with Weighting provides a Committed Information Rate (CIR) to
each user-defined class of traffic with the ability to allow a higher burstable rate depending
on availability. However, once the Minimums are met, the drain with weighting uses a user-
specified parameter in a range from 1 to 100; Scheduler will drain more data from a
Weight=8 queue than a Weight=7 queue until the Max is met.
•
DiffServ – This industry-standard method of providing QoS enables seamless co-existence in
networks that implement Differentiated Services. When using rule-based QoS, you can
configure up to 32 different rules based on:
o TOS
o Protocol
o MPLS_EXP bits
o VLAN
o Source Port (range)
o Destinaton Port (range)
o Source IP Address/Mask
o Destination IP Address/Mask
SERVICE (QoS)
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