Chapter 3 • Network management
1037852-0001 Revision A
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markup language (XML) formatted file and updates the Vision
UEM database with the site definitions and configurations. A
typical use of this tool is the integration of a service provider's
order-entry system. For better integration with desktop tools,
there is also a utility to convert comma-separated value
(CSV)-formatted files into XML.
Finally, NMSS provides a commissioning interface that is used
by the WebACS during the auto-commissioning process.
Fault management
Fault management functions provided by NMSS include status
monitoring, reporting, and alarms.
Status monitoring
Vision monitors the status of gateway and remote site network
components through simple network management protocol
(SNMP) and proprietary Hughes protocols. All managed HX
network components have embedded SNMP agents that can
report status and statistics information to a suitably configured
SNMP manager.
Vision uses SNMP to periodically obtain key status information
from gateway components. It can also query remote site
components periodically for key status information, although this
capability can be disabled to conserve network resources. Vision
can use an alternate mechanism–the VSAT information protocol
(VIP)–when available, to get status information from remote sites
more efficiently.
Current status information is displayed on the Vision UEM GUI
through color-coded icons. The GUI also provides fault-isolation
capabilities that operators and customer support agents can use to
troubleshoot and diagnose faults. The diagnosis functions use
real-time SNMP queries to report up-to-date information from
network components.
Alarms
HX network components with SNMP agents generate SNMP
traps when certain error conditions occur, and send them to a
configurable trap IP address. The traps generated by network
components are documented in the SNMP management
information base (MIB) definitions for those components.
To assist in the detection of failed sites or specific patterns of
network failures, NMSS can generate certain alarms in the form
of SNMP traps. For example, a component alarm can be
generated when a remote site has been down for a configured
period of time, and an aggregate alarm can be generated when the
number or rate of failures of components in a specific group
exceeds a configured threshold.
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