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Appendix B:
Note: If you wish to prioritize certain BSCs to connect to, a failover option is allowed in
the IP separated list. By prepending the letter F to the IP address, it designates that BSC as
a failover BSC. Only if the primary BSC(s) fail, will the AP associate to the failover
BSC(s). This provides N+1 redundancy. In the following example, 192.168.100.25 is
the failover BSC:
option 43 "192.168.100.23,192.168.100.98,F192.168.100.25 "
Click Apply to complete the scope option configuration.
5.
The defined scope option now appears, for example:
The BSAPs will connect to one of the BSCs defined in the vendor option.
Provisioning an Internet Systems Consortium (ISC) DHCP Server
To setup an ISC server on your network to send the DHCP Vendor option, you must first
match the identifier, then add the option:
if option vendor-class-identifier = "BlueSecure.AP1500" {
option vendor-encapsulated-options
7F:0D:31:39:32:2E:31:36:38:2E:31:36:30:2E
:31;
}
31 is hex for 1, 39 for 9, so the above string reads: 127 (vendor), 13 (length), then
192.168.160.1. The hexadecimal string is assembled as a sequence of the TLV values
for the Option 43 sub-option: Type + Length + Value. Type is always the sub-option code
0x7f (decimal 127). Length is the number of controller Protected IP addresses times 4 in
hex. Value is the IP address of the controller listed sequentially in hex.
B-6
Figure B-9: The Defined Scope Option
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