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

To prevent false detection, you should disable PoE on the 
ports on the PoE switches that are used to connect to PSEs. 
You should also first power up a PSE device before 
connecting it to a PoE switch. When a device is being falsely 
detected as a PD, you should disconnect the device from the 
PoE port and power recycle the device with AC power 
before reconnecting its PoE ports.

Verify the managing computer requirements in the product release notes.

To access the switch by using the web-based interface, you must know 
the IP address the switch is using. The switch uses the factory default IP 
address of 192.168.1.254 by default.

When the switch is using the factory default IP address, the System LED 
flashes continuously. When the switch is using a DHCP server-assigned IP 
address or an administrator has configured a static IP address, the System 
LED is on solid (DHCP is enabled by default). 

If you are managing the switch through a network connection and 

the switch IP address is changed, either by a DHCP server or manually, 
your access to the switch will be lost. You must enter the new IP address 
the switch is using into your browser to use the web-based interface.

To configure the smart switch:

Power on the computer and the switch.

Set the IP configuration on your computer. 

a.

If the switch is using the factory default IP address of 
192.168.1.254, you must chose an IP address for the computer 

in the range of 192.168.1.1—192.168.1.253 that is not already in 
use.

b. If the IP addresses is assigned by a DHCP server, make sure 

the DHCP server is running and can be reached from the 
switch and the computer. It might be necessary to disconnect