The questions in this section relate to general interface management issues for Cisco devices, such as the following:
Detecting whether an interface is operational
When RFC 1213 (MIB II) was originally drafted, the interface table variables were designed to reflect information about physical interfaces. Since then, the need has arisen to measure certain interface-related characteristics of logical connections that exist over physical lines. For example, a single physical serial interface may carry multiple Frame Relay DLCIs over it.
Starting with IOS version 11.1, Cisco implemented the concept of ...