SW Version 2.04 30-January-2009 Page 100 of 128
rocommunity public
rwcommunity private
Community Strings
sysDescr Appear TV Description field added to
standard mib.
sysObjectID .1.3.6.1.4.1.23916 DO NOT CHANGE
dlmod appeartv /usr/lib/atvsnmpmodule.so DO NOT CHANGE
When the snmp.conf is changed the SNMP daemon must be restarted in order for the
changes to take effect. To do this change to superuser and do:
stop atvsnmpd
start atvsnmpd
The SNMP agent uses the same IP address as the MMI. All alarms are forwarded as
SNMP traps. The Appear TV sub tree in the MIB contains a table with the trap
destinations where traps are sent, a table of active alarms, and the sequence
numbers of the newest, oldest and maximum possible active alarms.
5.2.3 Configuration of the Trap Destination Table
The trap destination table must be edited to receive traps. It has five entries, hence
allowing five different trap destinations to be used at the same time. Additional rows
cannot be created. The tdIpAddr field contains the IP address of the NMS, while the
tdRowStatus field is used to determine whether traps should be forwarded. To
enable traps towards a specified address the corresponding tdRowStatus field must
be set to active (1). To disable traps, set the tdRowStatus field to notInUse (2).
Errors are reported when trying to send traffic towards IP address 0.0.0.0, which is
the default IP address.
5.2.4 Interpretation of Traps
Each trap is uniquely identified with the combination of msgId, msgSlot, msgPort,
and msgInstance fields. The type of error is specified with the msgId field, while
the location is specified with the rest, where the msgSlot field is the slot, msgPort is
the port on the slot, while the msgInstance field is used when further differentiation
is necessary.
The other fields correspond to the fields in the GUI: the msgSeverity field to Level,
the msgSourceName field to Application, the msgText field to Error Code, and the
msgGenerationTime field to Set.
5.2.5 Worked Example on SNMP Usage
To test the SNMP implementation with net-SNMP, install the mibs in the mibs
directory. This directory may be "/usr/share/snmp/mibs", depending on the
installation.
To browse the entire mib tree for the mmi on IP address <src ip address> (note the
dot at the end of the line):
snmpwalk -m ALL -v 2c -c public <src ip address> .
To only browse the subtree:
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