Руководство По Установке для Cisco Cisco SG200-26P 26-port Gigabit PoE Smart Switch

No Power:   

Power up the switch and your computer if they are turned off.
Bad Ethernet connection:   

Check the LEDs for proper indications. Check the connectors of the 
Ethernet cable to ensure they are firmly plugged into the switch and 
your computer.

Bad Console port connection: 

Check the console cable connectors to make sure they are firmly 
plugged into the switch and your computer. Make sure the console 
port utility is configured with the correct parameters.

Make sure 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 interface, or from your network administrator. The System 
LED provides an indication of where the switch received the IP 
address. (See Section 4 for details.)

Make sure that no other device is using the same IP address as the 
switch.

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.

This section describes the exterior of the advanced smart switches 
including ports, LEDs, and connections.

The ports and LEDs are located on the front panel of the switch.

RJ-45 Ethernet Ports—Use these ports to connect network devices, such 
as computers, printers, and access points, to the switch.