
AP use L3 register on the AC6605, and AP get IP address and AC IP address from Cisco DHCP server. After configure DHCP server on Cisco router, the AP can get IP address normally, but cannot get the right AC IP address. The state of APs on AC6605 always Idle, and the AP try to get the AC address from DHCP server again and again with option 43.
NA
1. Connect the AP to AC6605 directly, the AP can register on AC6605 normally.
2. Checking the route from access switch to AC6605, they can access each other normally.
3. Configuring the DHCP server and option 43 on Huawei access switch, the APs can get IP address and AC IP address normally and resigter on AC6605.
When Huawei AP get option 43 from Cisco DHCP server, on Cisco DHCP server, option 43 should choose hex, please check the following example: the AC IP address is 192.168.100.1
ip dhcp pool test
network 192.168.100.1 255.255.255.0
default-router 192.168.100.1
option 43 hex 030d3139322e3136382e3130302e31 //03 sub type, 0d –length , the rest is the ASCII of the IP addres
The length and the ASCII of the AC IP address include the "."
The following is the ASCII we need:

To translate online, you can check the following link:
https://www.rapidtables.com/convert/number/ascii-to-hex.html
