Chapter 11
| Interface Commands
Interface Configuration
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show discard This command displays whether or not CDP and PVST packets are being discarded.
Command Mode
Privileged Exec
Example
In this example, “Default” means that the packets are not discarded.
Console#show discard
Port CDP PVST
-------- ------- -------
Eth 1/ 1 Default Default
Eth 1/ 2 Default Default
Eth 1/ 3 Default Default
Eth 1/ 4 Default Default
Eth 1/ 5 Default Default
Eth 1/ 6 Default Default
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.
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show interfaces brief This command displays a summary of key information, including operational
status, native VLAN ID, default priority, speed/duplex mode, and port type for all
ports.
Command Mode
Privileged Exec
Command Usage
◆ If an SFP transceiver is inserted in a port, the Type field will show the SFP type
as interpreted from Ethernet Compliance Codes (Data Byte 6 in Address A0h).
The Ethernet Compliance Code is a bitmap value, of which one bit is
supposedly turned on. However, if the read-out is not recognizable (e.g., 2 or
more bits on, or all 0s), the Type field just displays the raw data (hexadecimal
value).
◆ The Type field will always display “NA” for a trunk entry because a trunk allows
for mixed port types such as 1000Base T and 1000Base SFP.
Example
Console#show interfaces brief
Interface Name Status PVID Pri Speed/Duplex Type Trunk
--------- ------------------ ------- ---- --- ------------- ----------- -----
Eth 1/ 1 Up 1 0 Auto-100full 1000BASE-T None
Eth 1/ 2 Down 1 0 Auto 1000BASE-T None
Eth 1/ 3 Down 1 0 Auto 1000BASE-T None
Eth 1/ 4 Down 1 0 Auto 1000BASE-T None
Eth 1/ 5 Down 1 0 Auto 1000BASE-T None
Eth 1/ 6 Down 1 0 Auto 1000BASE-T None
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