Ruckus Wireless ZoneDirector 1100 User Manual page 33

NOTE: If you use this method, make sure that you do not change the IP address
of ZoneDirector after the AP discovers and registers with it. If you change the
ZoneDirector IP address, the AP will no longer be able to communicate with it and
will be unable to rediscover it.
Option 2: Customize Your DHCP Server
NOTE: The following procedure describes how to customize a DHCP server
running on Microsoft Windows. If your DHCP server is running on a different
operating system, the procedure may be different.
Configuring the DHCP Server for ZoneDirector-AP Communication
To customize your DHCP server, you need to configure DHCP Option 43 (043
Vendor Specific Info) with the IP address of the ZoneDirector device on the network.
When an AP requests an IP address, the DHCP server will send a list of ZoneDirector
IP addresses to the AP. If there are multiple ZoneDirector devices on the network,
the AP will automatically select a ZoneDirector to register with from this list of IP
addresses.
RFC 2132 describes DHCP Option 60 and Option 43. DHCP Option 60 is the Vendor
Class Identifier (VCI). The VCI is a text string that identifies a vendor/type of a DHCP
client. All Ruckus Wireless Access Points are configured to send "Ruckus CPE" as
the Vendor Class Identifier in option 60, and expect Zone Director IP information to
be provided in DHCP option 43 (Vendor Specific Info), encapsulated with sub-option
code 03 (the sub-option code for ZoneDirector).
The RFC describes how vendors can encapsulate vendor-specific sub-option codes
(ranging from 0 to 255). Sub-options are embedded in option 43 as TLV (type, length,
value) blocks.
Ruckus Wireless Access points support non-TLV format option 43 values with
comma separated IP address strings for discovering ZoneDirectors, and also TLV
based option 43 encapsulation as specified in RFC 2132.
For Zone Director information (sub-option code 03)
• Type: 0x03
• Length: Count of the characters in the ASCII string. (Length must include the
commas if there is more than one ZoneDirector specified.)
ZoneDirector 9.8 User Guide, 800-70599-001 Rev B
Ensuring That APs Can Communicate with ZoneDirector
How to Ensure that APs Can Discover ZoneDirector on the Network
33