Instruction manual

Installing and Stacking BayStack Hubs
2-12 893-839-C
• Power is connected to all hubs in the stack.
• The hub and any installed modules have completed their diagnostic cycle.
Checking the Diagnostic Displays
When you reset or connect power to a hub, it performs the following
diagnostic cycle:
• All LEDs momentarily flash amber, then green, then the correct color.
• Stat and Exp LEDs indicate boot status of the hub and NMM (if present).
The Exp LED lights solid amber after an unsuccessful BootP attempt. For
more information on these LEDs, see “LED Display” on page 1-12.
• A boot verification message is displayed if a display terminal is connected
to the communications port of a hub. For more information about the
communications port, see “Using the Communications Port” on page 4-3.
Troubleshooting
Use the diagnostic displays to help you pinpoint the type of problem you have.
Then double-check your compliance with the relevant following topics:
• Verify that all of the hubs in the stack are powered on.
• Verify that each cable and port connection has the correct pin assignment
and there are no loose connections.
• Verify the LED display on each hub. Refer to Table 1-8 on page 1-12.
• Verify that all media adapters and expansion slot modules are correctly
installed.
• Verify that your NMM is functioning correctly and the NMM LEDs light
properly. Refer to Using the BayStack 100-series Network Management
Modules included with your NMM.
• Verify compliance with all BayStack and Ethernet guidelines in “Network
Configuration Decisions” on page 3-1.
• Use Optivity or other network management software to monitor the
network and to verify that the hub and modules are operating correctly.
To do this, refer to the documentation included with your network
management software.
893-839-CBook Page 12 Thursday, December 12, 1996 4:18 PM