Device receives another IP - wlc9800

[lizochkanovichenko]

Hello!

I have noticed that some devices have been assigned a different IP address than their network. Corporate PCs recieve IP-address from network 10.148.x.x but PCs recieve IP-address from another network - 192.168.x.x. 

For example,

For this WLAN the dhcp Required is disable. 

Could there be a problem with this? But then why do other devices get the correct IP?
I also deleted such clients from the controller, they reconnected and received the correct IP address.

Thanks in advance! 

Have a nice day! 

[marce1000]

     >...but PCs receive IP-address from another network - 192.168.x.x. 
   - 192.168.x.x is a link local address , that only means that no address could be obtained from a DHCP server

   + Start with an overall checkup of the wlc9800 configuration with the CLI command show tech wireless
      and feed the output from that into Wireless Config Analyzer
      Do not use a simple show tech as input for this procedure.

  + For best DHCP setups look at : https://www.cisco.com/c/en/us/td/docs/wireless/controller/9800/technical-reference/c9800-best-practices.html#DHCPbridgingandDHCPrelay

  + Look at client health using  : https://www.cisco.com/c/en/us/support/docs/wireless/catalyst-9800-series-wireless-controllers/217738-monitor-catalyst-9800-kpis-key-performa.html#anc5  when making changes (before or after)

 +   - Further engage in full client debugging according to https://logadvisor.cisco.com/logadvisor/wireless/9800/9800ClientConnectivity , these debugs can be analyzed with Wireless Debug Analyzer   (for those clients who can not obtain an IP address through DHCP)

  M.