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Configuring WAN Line Services
B-54
308648-14.00 Rev 00
show serial alerts
The
show serial alerts
command displays all serial circuits that are enabled but
not up. Use this display to identify the interfaces that are not working.
This command allows for the following command filters (flags) and filter
arguments:
The output contains the following information:
-circuit
<circuit_name>
Displays information about the specified circuit only.
-slot
<slot>
Displays information about the specified slot only.
<circuit_name>
Displays information about the specified circuit only.
Slot/Conn Name of the physical interface.
Circuit Name of the circuit associated with this line.
Admin State Configured state of the serial port.
HW Address Physical address of the line. The line driver fills in this address from
the 48-bit address stored in the serial number PROM for this
connector.
WAN Protocol WAN protocol enabled on this interface.
Operational
State
State of the line driver, as follows:
Down -- Driver is not operational.
DSR Wait -- External equipment, such as a modem, DSU, or CSU,
is not currently up and is not asserting a Data Set Ready signal.
Init -- Driver is initializing.
LMI Wait -- Driver is waiting for any of four WAN protocols to
indicated that a link layer connection has been established to
another entity. This state applies to the frame relay, SMDS, ATM,
and PPP protocols.
Not Pres -- Driver is enabled but not yet started. This state occurs
for several reasons. For example, the link module may not be
physically present in the chassis; the software may be booting and
has not yet initialized the driver software; the slot may be running
diagnostics; or there may be a problem with the configuration.
Errors Number of errors for a specific circuit.
MTU Maximum transfer unit size -- the buffer size for the serial port (also the
largest frame that can be transmitted or received across the serial
port). The value ranges from 3 to 4608 bytes.
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