Fixing Link Down Problems; Identifying Conditions For Replacing An I/O Module - Extreme Networks BlackDiamond 6800 Installation And User Manual

Installing or Replacing an ATM Module

Fixing Link Down Problems

A flashing green port status LED can indicate the following conditions:
• Port is disabled.
• Port is not configured as a member of a VLAN.
To enable a port, use the following command:
enable ports <portlist>
To add a port to a VLAN, use the following command:
config vlan <name> add port <portlist> {tagged | untagged} {nobroadcast}
A flashing amber port status LED indicates that a signal has been detected, but that one
or more SONET alarms exist. Use the
status information.
If the port status LED is off, suspect a loss-of-signal condition caused by a optical-fiber
cable or connector problem. Check for one or more of the following conditions:
• The transmit (Tx) and receive (Rx) cable connectors are reversed in the module port
connector. Remove and reinsert the connectors in their correct positions.
• The optical-fiber cable is not terminated. Verify that the connectors on both ends of
the cable are plugged in correctly and firmly seated.
• The optical-fiber cable is damaged. Replace the cable with a cable known to be good
and try again.

Identifying Conditions for Replacing an I/O Module

If the STATUS LED on the ATM module turns amber and blinks, use the
command to display the slot status information. If the output of the command shows
that the module state is not OPERATIONAL, use the following commands to run the
diagnostics on the module and display the results:
run diagnostics [normal | extended] slot <slot>
show diagnostics slot {<slot>}
The displayed results list each test that was run, and indicate whether that test passed
or failed. If the diagnostics fail, replace the ATM module with another module of the
same type.
2-16
command to display SONET
show sonet detail
Asynchronous Transfer Mode (ATM) Module Installation and User Guide
show slot