With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cdpInterfaceIfIndex
Cisco Discovery Protocol Interface If Index
1.3.6.1.4.1.9.9.23.1.1.1.1.1
The ifIndex value of the local interface. For 802.3 Repeaters on which the repeater ports do not have ifIndex values assigned, this value is a unique value for the port, and greater than any ifIndex value supported by the repeater; in this case, the specific port is indicated by corresponding values of cdpInterfaceGroup and cdpInterfacePort, where these values correspond to the group number and port number values of RFC 1516.
Back to CISCO-CDP-MIB MIB page.
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