Good evening Julio,
I don't know if I have understood correctly , but If you want that NX5500 acts as DHCP server for clients connected to VLAN10 usually I simply create the DHCP policy (under Configuration> Services > DHCP server policy) and then I apply this DHCP policy over the specific Device (in this case Configuration > Devices > Your NX5500 > Services > DHCP Server, then select the DHCP Server policy from drop down menu).
I am not very familiar with the CLI commands, but this is an extract of configuration file that results
!
! Configuration of NX5500 version 5.9.2.5-001R
!
!
version 2.6
!
(…)
dhcp-server-policy DHCP-VLAN10
option ControllerIPAddress 191 ascii
dhcp-pool VLAN10
network 192.168.10.0/24
address range 192.168.10.100 192.168.10.200
default-router 192.168.10.254
(…)
NX5500 5C-0E-8B-1B-FE-5E
use profile default-NX5500
use rf-domain default
hostname NX55001BFE5E
(…)
use dhcp-server-policy DHCP-VLAN10
(…)
Obviously you must check that VLAN10 is correctly mapped to the desired WLAN, but I took it for assumed...
Regards, Andrea