Cisco 550XG Series Quick Start Manual page 13

Bad Console port connection:
Check the console cable connectors to make sure that they are firmly
plugged into the switch and your computer. Make sure that the console
port utility is configured with the correct parameters.
Wrong IP address:
Make sure that you are using the correct IP address of the switch. You
can determine the current IP address of the switch from the CLI
through the console port, or from your network administrator. The
System LED provides an indication of where the switch received the IP
address (See
using the same IP address as the switch.
No IP route:
If the switch and your computer are in different IP subnets, you need
one or more routers to route the packets between the two subnets.
Unusually long access time:
Due to the standard spanning tree loop detection logic, adding new
connections may take 30 to 60 seconds for the affected interfaces
and/or LAN to become operational.
Cisco 550XG Series 10G Stackable Switches Quick Start Guide
Front Panel for details.) Make sure that no other device is
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