Mocomtech CDM-QX - Manual (Page 132)

CDM-Qx/QxL Multi-Channel Satellite Modem with DoubleTalk™ Carrier-in-Carrier® Revision 7
Ethernet Management MN/CDMQX.IOM
6–2
6.3.1 Management Information Base (MIB) Files
MIB files are used for SNMP remote management and consist of Object Identifiers (OIDs). Each
OID is a node that provides remote management of a particular function. A MIB file is a tree of
nodes that is unique to a particular device.
The following MIB files are associated with the CDM-Qx/QxL:
MIB File/Name Description
FW10874-2-.mib
ComtechEFData
Root MIB file ComtechEFData MIB file gives the root tree for ALL Comtech EF Data products
and consists of only the following OID:
Name: comtechEFData
Type: MODULE-IDENTITY
OID: 1.3.6.1.4.1.6247
Full
path: iso(1).org(3).dod(6).internet(1).private(4).enterprises(1).comtechEFData(6247)
Module: ComtechEFData
FW11247-1-.mib
CDM-Qx MIB file
MIB file consists of all of the OIDs for management of the modem functions.
FW11247-2-.mib
CDM-Qx Traps
MIB file
Trap MIB file is provided for SNMPv1 traps common for base modems.
These MIB files should be compiled in a MIB Browser or SNMP Network Monitoring System server.
Note: The SNMP agent supports both “SNMPv1” and “v2c”. The “Traps” file only needs to be
compiled if “SNMPv1” traps are to be used.
6.3.2 SNMP Community Strings
The modem uses community strings as a password scheme that provides authentication before
gaining access to the modem 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 = comtech
6.3.3 SNMP Traps
The modem has the ability to send out SNMP traps when certain events occur in the modem. The
modem sends out traps when an alarm or a fault occurs in the modem. These include unit faults, Tx
faults, Rx faults, and ODU faults. A trap is sent both when a fault occurs and is cleared.