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Appendix A IfIndexes and Interface Identification
63
Getting Started with Passport 4400, Release 4.1
For physical interfaces, the PPA number corresponds to the physical port number
on the module. For logical or virtual interfaces, the number corresponds to a
logical port or interface and is dependent on the interface module type. If a device
does not support PPAs, the value -1 indicates that the field is not used as an
identifier.
Slot Name
The physical interface module is the name that the Passport 4460 uses to identify a
module interface. The base module is always base, and expansion modules are
named exp1 and exp2.The Serial Daughter Boards (SDBs) are considered
expansions to the base module itself, and are referred to as Port 2 and Port 3 of the
base module.
Channel Number
The channel number along with the slot and PPA number, uniquely identifies an
interface within a device type. However, the channel number itself is not unique
across all device types.
To display the channel number of an interface, along with additional interface
information, use the following CLI command:
CLI> show system interfaceExtension operational table
See “Configurator Procedure for Displaying the IfIndex Table” on page 60 for the
Configurator steps for displaying IfIndex parameters.
For interfaces describing serial data connections (data ports), the channel number
refers to the physical data channel. For interfaces describing voice channels, the
channel number refers to the corresponding voice channel number. For interface
types that do not use a channel number, the value of -1 is used.