C
HAPTER
30
| Interface Commands
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COMMAND USAGE
When performing an internal loopback test, packets from the specified
interface are looped back into its internal PHY. Outgoing data is looped
back to the receiver without actually being transmitted. Internal loopback
makes it possible to check that an interface is working properly without
having to make any network connections.
EXAMPLE
Console#test loop internal interface ethernet 1/1
Internal loopback test: succeeded
Console#
show cable-
diagnostics
This command shows the results of a cable diagnostics test.
SYNTAX
show cable-diagnostics interface [interface]
interface
ethernet unit/port
unit - Unit identifier. (Range: 1)
port - Port number. (Range: 1-24)
COMMAND MODE
Privileged Exec
EXAMPLE
Console#show cable-diagnostics interface ethernet 1/10
Console#show cable-diagnostics interface e 1/10
Port Type Link Status Pair A (meters) Pair B (meters) Last Update
-------- ---- ----------- ---------------- ---------------- -----------------
Eth 1/10 GE Up OK (21) OK (21) 2009-11-13 09:44:19
Console#
show loop internal This command shows the results of a loop back test.
SYNTAX
show loop internal interface [interface]
interface
ethernet unit/port
unit - Stack unit. (Range: 1)
port - Port number. (Range: 1-24)
COMMAND MODE
Privileged Exec
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