Roadmap for Configuring Channelized IQ Interfaces
To configure a channelized IQ interface, you must perform one or more of the following procedures:
Configure a clear channel. A clear channel consolidates the entire bandwidth of a channelized interface into a single unpartitioned stream that looks like a standard interface. For example, a channelized OC12 IQ interface configured as a clear channel appears to have an OC12 SONET interface.
Configure single-level channels. By configuring single-level channels, you subdivide a channelized interface into a set of large end channels.
Configure multilevel channels. You can subdivide a channelized interface and then split these subchannelized interfaces into end channels. Creating small end channels might require you to configure multilevel channels.
Configure class of service. On channelized IQ interfaces, you can apply class of service at the logical interface level for Frame Relay data-link connection identifiers (DLCIs).