User guide

VMS Network Configuration
3-8 VMS User Guide
Figure 3-7 Vipersat Manager, General tab
3. The Local VMS Address will default to 0.0.0.0 on new installations and
must be changed to reflect the IP address of the NIC that connects the VMS
server to the Vipersat Hub LAN. This address configuration is necessary
because of multiple LAN ports on the server.
4. The Base Port sets the starting IP port addressing for all VMS messages.
Changing this address base will affect the entire network requiring configu-
ration changes to all modems. Leave this setting at default C000 to avoid
unnecessary configuration changes. This setting is ONLY necessary if net-
work port addressing is in contention.
5. The TOS (Type Of Service) Value provides prioritization of VMS messages
in cases where the forwarding router is congested or overloaded. The value
typically is set to Class Selector 6 or “192” for priority queuing to allow
management/singling messages the highest passage level.
6. The Guardband is the center carrier-to-carrier frequency slot allocation set-
ting. The default setting of 35% will place carriers within the bandwidth
pools at 1.35 times the carrier symbol rate. Contact your satellite service pro-
vider for proper setting of carrier spacing.
7. The Streamload Data Rate values determine the amount of bandwidth
required to GET and PUT modem configuration files. Set the rates not to
exceeded the network transmission bandwidths, forward and return channel
rates. These values are typically set low as the file transferred is small and
requires little overhead. Default settings are usually acceptable.