Configuring LAN Interfaces

Configuring a LAN Extender Interface

Table 4

LED Trouble Indicators (continued)

 

 

 

SYSTEM OK

On Steady

Lights when the unit passes the power on diagnostics. This

 

 

 

indicates proper operation.

 

 

 

 

 

 

Blinking

Blinks while running startup diagnostics, then goes on

 

 

 

steady.

 

 

 

Blinking after the start-up diagnostics indicates that a

 

 

 

system error has been encountered. Contact your system

 

 

 

administrator who will have you disconnect and then

 

 

 

reconnect the power to recycle your LAN Extender. If the

 

 

 

blinking continues, check your WAN connection and the

 

 

 

RX and TX LEDs.

 

 

 

 

 

 

Off

An error condition has occurred. Contact your system

 

 

 

administrator who will ask you to disconnect the power

 

 

 

cord and then reconnect it to re-establish power to your

 

 

 

LAN Extender.

 

 

 

 

LED

 

Condition

Meaning

 

 

 

ISDN B1and

Flicker

The serial line is transmitting and receiving packets

ISDN B2

 

 

normally.

 

 

 

 

 

 

Blinking

A line fault has been detected. The LEDs will go on for

 

 

 

several seconds and then they will blink a certain number

 

 

 

of times to indicate a particular error. The LEDs will blink

 

 

 

at a rate of one to two blinks per second. The following are

 

 

 

the errors that can be encountered:

 

 

 

1 blink = The serial line is down.

 

 

 

2 blinks = No clock signal was received.

 

 

 

3 blinks = An excessive number of cyclic redundancy

 

 

 

check (CRC) errors has been received.

 

 

 

4 blinks = The line is noisy.

 

 

 

5 blinks = A loopback condition has occurred.

 

 

 

6 blinks = The PPP link has failed.

 

 

 

Contact your system administrator.

 

 

 

LAN TX and

Flicker

The Ethernet LAN connection is transmitting and receiving

LAN RX

 

 

data normally.

 

 

 

COLLISION

 

Detects data collisions.

 

 

 

 

LINK OK

 

Steady

Indicates that the serial link is up and functioning.

 

 

 

 

For more complete network troubleshooting information, refer to the Troubleshooting Internetworking Systems publication.

Cisco IOS Interface Configuration Guide

IC-57

Page 35
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Cisco Systems IC-23 manual System OK, IC-57

IC-23 specifications

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