Comtech EF Data CDM-570A - Manual (Page 476)

CDM-570L/570AL Satellite Modem with Optional Packet Processor MN-CDM570A
Appendix D Revision 2
D–18
compression algorithms (LZS, GZip specifically). This, of course, does not apply to streamed
packet data across an IP network (e.g., FTP transfer).
D.1.2.8 Advanced Quality of Service (QoS)
Appendix L. ADVANCED QUALITY OF SERVICE (QoS)
Advanced Quality of Service (QoS) is an optional feature of the Packet Processor. Advanced QoS
enables a network to use WAN bandwidth more efficiently by managing delay, jitter (delay
variation), throughput, and packet loss. It is based on OSI model to Layer 7 protocol header
parameters. Advanced QoS requires that the optional Packet Processor is installed and active,
and requires that you purchase and activate the Advanced QoS FAST Option. Contact Comtech
EF Data Product Support for further information.
The CDM-570A/570AL-IP incorporates four Per Hop Behavior (PHP) QoS modes of operation:
• Max/Pri Mode – QoS Rules based on Maximum Bandwidth and Priority.
This mode provides multi-level traffic prioritization with the ability to limit maximum traffic
per priority class.
• Min/Max Mode – QoS Rules based on Minimum and Maximum Bandwidth.
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
• DiffServ Mode – Differentiated Services.
This mode incorporates the industry-standard method of providing QoS, enabling seamless
co-existence in networks that implement DiffServ.
• VLAN Priority Max Mode – VLAN 802.1q
When using rule-based QoS, you can configure up to 32 different rules based on:
• Source IP address and subnet mask;
• Source Port;
• Protocols (well known);
• Destination IP address and subnet mask;
• Destination Port;
• Priority.