This section describes the MIBs and OIDs used to manage the dial Internet access service in the case study. See the following tables and choose the variables you want to use in your network. Explore the OIDs and determine whether to poll and graph the results on a regular basis.
Caution Be cautious when polling network elements.
Polling OIDs that retrieve large amounts of data can cause CPU problems on a Cisco IOS device. For example, do not get the ARP table, walk large portions of a MIB tree, poll the wrong OID too frequently, or get statistics that have an entry for every interface. To protect a network access server from over polling, use the SNMP get bulk feature. Table 11 and Table 12 identify useful OIDs and variables within selected MIBs from Table 10 . Equivalent Cisco IOS commands are shown wherever applicable.