DHCP lease time change

[ITexpert]

Hello guys,

I change the lease time on DHCP server on Cisco core switch but its still showing the old lease expiry.

I want to renew all the bindings without disturbing the end user devices ? 

I want to accomplish this through dhcp server ?

Thanks

[omz]

https://www.cisco.com/c/en/us/td/docs/ios/12_2sb/12_2sba/feature/guide/sbahcprr.pdf

Router# renew dhcp ethernet 3/1

This will probably disturb end users.  

clear ip dhcp binding {address | * }

[ITexpert]

what if I put this command on up-link ports. Does it renew all the leases for whole switch without disturbing users ?

[omz · Accepted solution]

The dhcp renew xxx command renews the lease for an interface that has DHCP assigned address and not the client connected on that interface. 

Interface does not have a DHCP originated address error is thrown.

I guess clear ip dhcp bind * may be required. Unless someone knows another way to renew the lease for clients.