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    Configuring the SNMP Server Encoding Scheme of the ifDescr and ifName Objects

    You can control how the router encodes the ifDescr and ifName objects in the SNMP agent’s interface table and in the bulkstats application. There are two choices of encoding schemes: an E Series router proprietary method and a conventional industry method.

    • The proprietary method identifies each interface sublayer with its type.
    • The industry method bases the type information for each interface sublayer on the lowest layer 1 or layer 2 interface type.

    For example a PPP interface configured on top of an ATM interfaces is:

    • PPP3/0.1—Proprietary method
    • ATM3/0.1—Industry method

    You can use the snmp-server interfaces description-format command to set the encoding scheme of the ifDescr and ifName objects. This command uses one of the following keywords:

    • common—Sets the encoding scheme to the conventional industry method and provides compatibility with software that uses the industry encoding scheme.
    • legacy—Sets the encoding scheme for legacy E Series routers.
    • proprietary—Sets the encoding scheme to the E Series router proprietary method.

    To set the encoding scheme of the ifDescr and ifName objects:

    • Execute the snmp-server interfaces description-format command in Global Configuration mode.
      host1(config)#snmp-server interfaces description-format common

      Use the no version to return to the default, the legacy encoding scheme.

    Published: 2014-08-12