Reference Guide

Table 6: Type of Ports
Port Type Description
Physical Ports The physical ports for each slot are numbered sequentially starting from one/
For example, port 1 on slot 0 (an internal port) for a stand alone (nonstacked)
switch is 1/0/1, port 2 is 1/0/2, port 3 is 1/0/3, and so on.
Logical Interfaces Port-channel or Link Aggregation Group (LAG) interfaces are logical interfaces
that are only used for bridging functions.
VLAN routing interfaces are only used for routing functions.
Loopback interfaces are logical interfaces that are always up.
Tunnel interfaces are logical point-to-point links that carry encapsulated packets.
CPU ports CPU ports are handled by the driver as one or more physical entities located on
physical slots.
Note
In the CLI, loopback and tunnel interfaces do not use the unit/slot/port format. To
specify a loopback interface, you use the loopback ID. To specify a tunnel interface, you use
the tunnel ID.
Using the “No” Form of a Command
The no keyword is a specific form of an existing command and does not represent a new or distinct
command. Almost every configuration command has a no form. In general, use the no form to reverse
the action of a command or reset a value back to the default. For example, the no shutdown
configuration command reverses the shutdown of an interface. Use the command without the keyword
no to re-enable a disabled feature or to enable a feature that is disabled by default. Only the
configuration commands are available in the no form.
Executing Show Commands
All show commands can be issued from any configuration mode (for example, Global Configuration,
Interface Configuration, or VLAN Configuration). The show commands provide information about
system and feature-specific configuration, status, and statistics. Previously, show commands could be
issued only in User EXEC or Privileged EXEC modes.
CLI Output Filtering
Many CLI show commands include considerable content to display to the user. This can make output
confusing and cumbersome to parse through to find the information of desired importance. The CLI
Output Filtering feature allows the user, when executing CLI show display commands, to optionally
specify arguments to filter the CLI output to display only desired information. The result is to simplify
the display and make it easier for the user to find the information the user is interested in.
The main functions of the CLI Output Filtering feature are:
•
Pagination Control
•
Supports enabling/disabling paginated output for all show CLI commands. When disabled,
output is displayed in its entirety. When enabled, output is displayed page-by-page such that
Using the Command-Line Interface
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