Comtech EF Data VMS v3.12.x Vipersat - Manual (Page 358)

General MN/22156, rev 12
7-2 VMS User Guide
• The ModCod setting to be used for the channel can be specified, both
when configuring the circuit and when conducting the switch setup.
• No restriction on the number of channels per circuit.
The SNMP Modem Manager is the controlling VMS service for all non-Viper-
sat Out-of-Band modems. Modem units that do not have a Vipersat Network
driver—and thus can not be configured for InBand management—are unable to
utilize IP routing functions to communicate with the VMS, and instead utilize
SNMP for these communications and are managed by the SNMP Modem
Manager when functioning in a Vipersat satellite network.
Configuration and setup of Out-of-Band units and circuits is relatively simple
and straightforward due to the functional limitations of these units. Switching
operations are conducted either manually or via schedule. Automatic switching
is not available. Other features/functions that are not available include the
following:
• Reservations for assigned bandwidth
• Advanced ModCod switching
• Home state, SHOD, Policies, Distribution lists
• Allocated devices (devices are assigned)
• Multicast (each device is controlled separately)
• Minimum/Maximum data rate per site limits
Out-of-Band Circuit Manager (OBCM)—the VMS service manager that
enables Out-of-Band switching—works seamlessly with the InBand Manager.
Priorities for both InBand and Out-of-Band sessions and bandwidth reservations
for InBand are still honored. It is incumbent upon the operator to determine
what types of circuits have higher priorities within his network.
Ethernet IP Interface
In order for the VMS to communicate with a satellite network modem, the
modem must have an IP-addressable unit. Modems such as the CDM-700,
SLM-5650, CDM-625, and CDM-570 have built-in Ethernet interfaces and do
not require an external CiM adapter. An SNMP unit can use either the base
modem or the NP card as the Ethernet interface for IP. In contrast, a Vipersat-
enabled unit must use the NP card as the Ethernet interface. Refer to each
modem unit’s documentation for the procedure for assigning a valid IP address
to the unit.
The CDM-600/L is a non-IP capable modem, and requires the use of the
Comtech CiM-25 to provide the Ethernet IP interface. The CiM-25 is assigned a
valid IP address using procedures described in the appropriate product docu-
mentation, as well as in the procedure below.