Snmp Community Strings; Snmp Traps - Comtech EF Data CDM-570 Installation And Operation Manual

CDM-570/570L Satellite Modem with Optional IP Module
Ethernet-based Remote Product Management

6.4.2 SNMP Community Strings

In SNMP v1 and SNMPv2c, the SNMP 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 CDM-570/570L uses Community Strings as a password scheme that provides authentication
before gaining access to the router agent's MIBs. They are used to authenticate users and
determine access privileges to the SNMP agent.
Type the SNMP Community String into the user-supplied MIB Browser or Network Node
Management software. Define three Community Strings for SNMP access:
•
•
•
Note: Maximum number of characters for community strings shall not exceed 20. All printable
ASCII characters, except '\' and '~' are allowed. No trailing spaces are permitted for community
strings.

6.4.3 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. The style of traps
that is sent by the CDM-570/570L sends can be configured using the cdmipSnmpTrapVersion
OID. The following tables list the MIB-II v1traps/v2 notifications that the modem supports:
CDM-570/570L MIB-II SNMPv1 traps:
Cold Start
Link Up
Authentication Failure
CDM-570/570L MIB-II SNMPv2 notifications:
Cold Start
Link Up
Authentication Failure
Read Community
Write Community
Trap Community
default = public
default = private
default = comtech
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