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CDM-570/570L Satellite Modem with Optional IP Module Revision 4
SNMP Interface MN/CDM570L.IOM
19.3 SNMP Community Strings
The CDM-570/570L uses community strings as a password scheme that provides
authentication before gaining access to the CDM-570/570L agent’s MIBs.
In SNMP v1/v2c, the community string is sent unencrypted in the SNMP packets.
Caution must be taken by the network administrator to ensure that SNMP packets travel
only over a secure and private network if security is a concern. A packet sniffer can
easily obtain the community string by viewing the SNMP traffic on the network.
The community string is entered into the MIB Browser or Network Node Management
software and is used to authenticate users and determine access privileges to the SNMP
agent.
The user defines three Community Strings for SNMP access:
• Read Community default = public
• Write Community default = private
• Trap Community default = public
19.4 SNMP Traps
The CDM-570/570L has the ability to send out SNMP traps when certain events occur in
the modem. For example, when the CDM-570/570L boots it sends out a coldstart trap
and three linkup traps, one for each interface that is brought up. The CDM-570/570L also
sends out traps when an alarm or a fault occurs in the modem. These include unit faults,
TX faults, and RX faults. A trap is sent both when a fault occurs and is cleared.
The CDM-570/570L supports both SNMPv1 traps and SNMPv2 notifications. Which
style of traps the CDM-570/570L sends can be configured by the user using the
cdmipSnmpTrapVersion OID.
The following are the MIB2 v1traps/v2 notifications that the CDM-570/570L supports.
CDM-570/570L MIB2 SNMPv1 traps:
Cold Start 1
Link Up 4
Authentication Failure 5
CDM-570/570L MIB2 SNMPv2 notifications:
Cold Start 1.3.6.1.6.3.1.1.5.1
Link Up 1.3.6.1.6.3.1.1.5.4
Authentication Failure 1.3.6.1.6.3.1.1.5.5
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