SNMP

Simple Network Management Protocol (SNMP) is a family of standards-based protocols and procedures to allow vendor-independent data network management. Using a simple set of protocol commands, an SNMP-compliant device stores information in standard format in one or more Management Information Bases (MIBs). Usually, devices support the standards-specific MIB termed MIB-II. In addition, devices can define one or more “custom MIBs” that contain information about the device’s specifics.

As of Release 1.1, the 4600 Series IP Telephones are fully compatible with SNMPv2c, a later version of SNMP, and with Structure of Management Information Version 2 (SMIv2). The telephones respond correctly to queries from entities that comply with earlier versions of SNMP, such as SNMPv1. “Fully compatible” means that the telephones respond to queries directed either at the MIB-II or the Custom MIB. The 4600 Series IP Telephone Custom MIB is read-only. Read-only means that the values therein cannot be changed externally by means of network management tools.

You can restrict which IP Addresses the telephone accepts SNMP queries from. You can also customize your community string with system values SNMPADD and SNMPSTRING, respectively, as indicated in Chapter 4: Server Administration, Table 10:  4600 Series IP Telephone Customizable System Parameters.

SNMP has been enabled by default since Release 1.1. However, as of Release 2.6, the SNMP default changed to Null (Off). To activate SNMP, you must set SNMPSTRING to a non-null value by means of either the 46xxsettings file or DHCP Option 176 (SSON). If you use static programming, you cannot enable SNMP as of Release 2.6.

To find more information about SNMP and MIBs, see the IETF references listed in Related Documents. The Avaya Custom MIB for the 4600 Series IP Telephones is available for download in *.txt format on the Avaya support Web site. This Custom MIB is common to both H.323 and SIP IP telephones. Objects that are not relevant to a given telephone have Null data.