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Using Technician Interface Scripts
2-182
303560-A Rev 00
show csmacd
The
show csmacd
<option>
commands display configuration, status, and statistical
information about the Carrier Sense Multiple Access with Collision Detection protocol
(CSMA/CD). Ethernet uses this protocol to control access to the medium. End stations use
CSMA/CD to monitor the medium and wait until it is idle before transmitting data. For
more information, refer to Configuring Ethernet, FDDI, and Token Ring Services.
The
show csmacd
command supports the following subcommand options:
alerts
Displays all circuits that are enabled but not up. Use this display to identify interfaces that
are not working. The table includes the following information:
alerts hwfilters
autoneg [circuit <circuit name>] receive errors [circuit <circuit name>]
base [circuit <circuit name>] sample [<period in seconds>] [circuit
<circuit name>]
collisions [circuit <circuit name>] stats [circuit <circuit name>]
disabled system errors [circuit <circuit name>]
enabled transmit errors [circuit <circuit name>]
Slot Slot identifier; ranges vary according to router model. For routers
other than the ASN, indicates the physical slot number.
Conn Connector’s instance identifier. For an Ethernet Link Module, the
range is 1 or 2. For a Net Module, the value is 11 to 44.
Circuit Name of the circuit associated with this line.
State State of the line driver: Disabled, Down, Init (initializing), Not
Present (enabled but not yet started), or Up.
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