No Light; Red Light - HP ProCurve Secure 7000dl Series Basic Management And Configuration Manual

No Light

Ensure that you are checking the LED that corresponds to the slot where the
serial module is installed. Next, view the status of the serial interface by
entering:
ProCurve# show interfaces serial <slot>/<port>
If the serial interface is administratively down, move to the serial interface
configuration mode context and enter:
ProCurve(config-ser 1/1)# no shutdown
The status of the interface should change.

Red Light

If the LED is red, the interface is administratively up, but it is receiving alarms.
View the status of the serial interface by entering:
ProCurve# show interfaces serial <slot>/<port>
Figure 5-10 shows a serial interface that is down.
ser 2/1 is down, line protocol is DOWN
Encapsulation is not set
Transmit clock source is TCLK
DCD=up DSR=up
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
0 packets input, 0 bytes, 0 no buffer
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame
0 abort, 0 discards, 0 overruns
0 packets output, 0 bytes, 0 underruns
s
Figure 5-10. Using the show interfaces serial Command to Troubleshoot the Serial
Interface
Some possible problems and solutions are listed below:
The router is not receiving a signal from the CSU/DSU.
• Verify that you have configured the correct serial-mode setting for
the cable that you are using. For example, if you are using an X.21
cable, verify that you have configured serial-mode X21 for the
interface.
• Check the connections to make sure that the cable is not loose.
Configuring Serial Interfaces for E1- and T1-Carrier Lines
DTR=down RTS=down
Troubleshooting a Serial Connection
CTS=up
5-19