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Configuring E1 and T1 Interfaces
Troubleshooting E1 and T1 WAN Connections
You should start by troubleshooting the physical interface because it must be
up before the logical connection can be established. You can quickly check
the LEDs on the front of the ProCurve Secure Router to determine the status
of a physical interface. Locate the LED that corresponds to the slot in which
the E1 or T1 module is installed. (See Figure 4-10.)
Figure 4-10. Use the Stat LED to Check the Status of a Physical Interface
Table 4-7 shows the possible color of the stat LED, lists the meaning, and
outlines the action you might take next.
Table 4-7. Check the LEDs
LEDs for slot 1
LEDs for slot 1
Color Meaning Action
No light No module is installed,
or the interface is not
activated.
• Ensure you are checking the LED for the slot in which the E1 or T1 module is
installed.
• Enter the show interface <interface> <slot>/<port> command to determine
if you need to activate the interface.
• If the line is administratively down, enter no shutdown.
Red Interface is activated,
but there are alarms.
•Use the show interface <interface> <slot>/<port> command to determine
what alarms are being reported.
• Check the configuration.
• Check the connections and the cable itself.
Yellow The interface is in
loopback mode
• Cancel the loopback, or call your public carrier and ask for the loopback to
be canceled.
Green The Physical Layer is
up.
• Enter the show interface <interface> <slot>/<port> command to ensure that
you have configured the correct Data Link Layer protocol for the line.
• Ensure that you have configured the correct channels for the connection.
• Check the status of the logical interface and follow the troubleshooting steps
for the protocol you are using.
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