Comtech EF Data CDM-570/570L Vipersat - Manual (Page 71)

Chapter 3 - Using the Command Line Interface (CLI) 3-35
Vipersat Configuration
VESP (Vipersat External Switching Protocol) or, in legacy VMS systems, via
an ASR (Automatic Switch Request) message. The VMS switch detector
service then applies the required or requested bandwidth using policies which
have been pre-configured in the VMS. Refer to the VMS User’s Guide for
details.
For example, if in a non-encrypted network a voice application service connec-
tion is started, the CDM-570/570L’s classifier analyzes signaling and data
protocols (H.323, SIP, & Data RTP) being routed through the CDM-570/570L.
After connection detection, the process waits for data (RTP). Data is normally
sent after the receiving party answers, which then triggers the system to process
an ASR. Using the ToS classification, the detection function allows application-
based switching in encrypted networks where the signaling protocols are
encrypted or effectively hidden.
Note: Load switching by the VMS is not affected by enabling ToS detection.
QoS Switch Detection
This menu item appears for Remote modems only.
One of the four automatic switching functions that the Vipersat CDM-570/570L
is able to perform is QoS (Quality of Service) Switching. The optional QoS
capabilities available in each modem/router may be utilized whenever a modem
will be handling high-priority traffic, such as video or voice. While developing
the QoS rules to be applied to the unit, the type of traffic the modem is expected
to handle must be considered.
With this feature, an STDMA to SCPC switch can be initiated based upon any
type of IP traffic flow that matches a defined QoS queue. QoS detection occurs
in the Remote modem classifier, which looks at traffic that is passed in both
directions (Hub-to-Remote and Remote-to-Hub). When an IP packet matches a
defined QoS rule, the Remote modem sends an ASR to the VMS that contains
the destination address of the detected packet, the defined bit rate, and the
policy type. If available hardware and bandwidth exist, the VMS will establish
the SCPC carrier automatically.
Enable Quality of Service (QoS) Feature
Note: Quality of Service is an optional modem/router feature. If the QoS feature
(FAST feature code) has not been purchased for this modem, the QoS
menu item will not be displayed.
The QoS feature must be enabled in order for the QoS Switch Detection feature
to function. The QoS feature is Enabled/Disabled from the Feature Configura-
tion screen (see figure 2-3).
NOTE
NOTE