Snmp traps – Grass Valley Imagestore 750 v.3.0.1 User Manual
Page 169
153
Imagestore 750
User Manual
Note: The factory default settings are chosen to give errors for hardware states which are abso-
lutely critical to the operation of the Imagestore 750. During the commissioning of Imagestore
750s, you should decide on additional error conditions that will be needed to optimize the
monitoring of your system. For example, errors in the reference, or video and audio inputs,
should probably carry some warning level.
Note: When Dolby E or Dolby Digital (AC-3) is fed into the AES inputs, the signal is reported as
‘Non-Audio’. This is because Imagestore 750 is unable to detect Dolby E or Dolby Digital (AC-3)
on its AES inputs and so treats it as non-PCM..
You can also configure whether an associated SNMP trap should be triggered when any failure
occurs. (See
, following.)
SNMP Traps
The alarm settings described under
on page 151 can be monitored
using SNMP traps.
In typical SNMP setups, one or more administrative computers, called managers, have the task
of monitoring or managing a group of devices on a computer network. Each managed device
(in this case, the Imagestore 750) executes a software component called an agent which reports
information via SNMP to the manager.
An SNMP-managed network consists of three key components:
•
Managed device
—
the Imagestore 750.
•
Agent
—
software which runs on managed devices.
•
Network management system (NMS)
—
software which runs on the manager.
A network management system (NMS) executes applications that monitor and control
managed devices. Although the Imagestore 750 does not permit any SNMP control, it does
provide an extensive range of traps for monitoring error states. (See
page 151 for the alarm settings.)
Network management systems (NMS) provide the bulk of the processing and memory resources
required for network management. This means that there is little load placed on the Imagestore
750 as it reports on error states. Also a single manager can monitor many managed devices
within one or multiple facilities thus centralizing all monitoring.
SNMP agents expose data on the managed systems as variables. The variables accessible
through SNMP are organized in hierarchies. These hierarchies, and other metadata (such as type
and description of the variable), are described by Management Information Bases (MIBs).
This document does not describe how to set up an SNMP manager, however there are many
examples on the internet.
Note: Miranda makes available two MIBs for the Imagestore 750
—
one for the manufacturer
(Miranda) and one for the product (Imagestore 750). Please contact Miranda Customer Support
for the latest MIBs. They can also be copied from the Imagestore 750 at ‘/usr/share/snmp/mibs/
IMAGESTORE-MIB.txt’ and ‘/usr/share/snmp/mibs/MIRANDA-MIB.txt’.