Hi ,
The official CISCO document states that option 43 is declared via either ascii or hex values comma-separated. The manner in which the hex value is to be calculated is given as :
"Note: TLV values for the Option 43 suboption: Type + Length + Value. Type is always the suboption code 0xf1. Length is the number of controller management IP addresses times 4 in hex. Value is the IP address of the controller listed sequentially in hex. For example, suppose there are two controllers with management interface IP addresses, 192.168.10.5 and 192.168.10.20. The type is 0xf1. The length is 2 * 4 = 8 = 0x08. The IP addresses translates to c0a80a05 (192.168.10.5) and c0a80a14 (192.168.10.20). When the string is assembled, it yields f108c0a80a05c0a80a14. The Cisco IOS command that is added to the DHCP scope is option 43 hex f108c0a80a05c0a80a14."
http://www.cisco.com/c/en/us/support/docs/wireless-mobility/wireless-lan-wlan/97066-dhcp-option-43-00.html
Is the manner in which you have put this value in your configuration correct ?
Also, do you have another upstream device whose address is X.Y.Z.65 ? The config you provided marks the vlan1 IP as 66 and I suppose you are carrying all the network traffic on vlan 1 itself.
ip dhcp pool Servers
network X.Y.Z.64 255.255.255.192
default-router X.Y.Z.65
dns-server X.Y.Z.25 X.Y.Z.43
option 43 hex f104.8ce7.ae42
option 66 ip X.Y.Z.61
lease 365
!
