Technical Tip: Remove IP from an interface

Attempting to remove LAN IP from the interface gives an error 'Entry in Use'.

The steps given below need to be followed:

• This error is coming because the Interface has references associated with it, as shown on the screenshot below.
  
  

• The references need to be cleared.
• Hover the mouse pointer on the references and select it. 
• It will bring up the reference section as shown in the screenshot given below.

• Delete each of the references by selecting them individually.
• For example, select 'Internet(1)' under the Firewall Policy and select 'View List' this brings up the Reference that needs to be deleted.

• Either the entire policy is deleted or the interface 'Port2' is removed from the 'Incoming interface'.

• The same procedure is followed for the rest of the other two reference objects.
• Once all the references are cleared then try to remove the address from the interface.

• The references are showing 'Zero' but still it is impossible to remove the IP address. It is because it is being used at the syslog as a source-ip.

• From the firewall CLI remove the 'Source-IP' for the Syslog server.

• The command used to unset the source-ip 'unset source-ip':

config log syslogd setting
    unset source-ip
end

• After that, the IP can be removed from the interface.