Comtech EF Data VMS v3.12.x Vipersat - Manual (Page 350)

VMS Service Managers MN/22156, rev 12
6-44 VMS User Guide
SNMP Modem Manager
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.
For additional information on the SNMP Modem Manager, refer to Chapter 7,
"Out-of-Band Units".
Redundancy Manager
The VMS Redundancy Manager is the controlling service for N:M Hub modem
redundancy. This service provides for the protection of critical VMS network
modems operating in the Hub mode, and enhances overall network reliability by
backing up primary components with standby backup units. The N:M redundant
architecture is software driven utilizing IP packet control.
A representative block diagram of Hub modem redundancy is shown in
figure 6-54, below.