Good day, everybody!
This post is about a Huawei device as a DHCP server to configure Option 43 to AP. Please read further down for details.
Source: http://blog.schertz.name/2012/05/understanding-dhcp-option-43/
BACKGROUND
When the AC and the Huawei AP are on the same network segment, the Option 43 field does not need to be configured. The Huawei APs can also discover the AC in the same network segment through broadcast. If the Option 43 field is configured, a Huawei AP preferentially sends a discovery request unicast packet to the AC in the Option 43 field to discover the AC. If the Huawei AP sends ten discovery request unicast packets, no response is received. Then the Huawei AP will select Broadcast mode to discover the AC.
PROCEDURE
Interconnecting with the Huawei AP, Option 43 configuration (either one of sub-option 1 2 3 or directly in hex format):
Huawei DHCP server and Huawei AP:
interface Vlanif100
ip address 192.168.100.1 255.255.255.0
dhcp select interface
dhcp server option 43 sub-option 1 hex C0A86401
(C0A86401 is the hexadecimal number converted from four decimal numbers 192 168 100 1)
dhcp server option 43 sub-option 2 ip-address 192.168.100.1
dhcp server option 43 sub-option 3 ascii 192.168.100.1
dhcp server option 43 hex 0104c0a86401
(corresponding to sub option 1)
dhcp server option 43 hex 0204c0a86401
(corresponding to sub option 2)
dhcp server option 43 hex 030d3139322e3136382e3130302e31
(corresponding to sub option 3)
