When a WLAN zone operates in Layer 2 Bridge Mode, a DHCP server is not allowed on the primary bridge interface or the secondary bridge interface. DHCP may only be passed through the bridge-pair. However, wireless clients can get their IP addresses from DHCP.
When a WLAN zone operates in Static IP Mode, a default DHCP lease scope is automatically created. If a wireless interface is bridged to another interface, the wireless client gets its IP address from the primary interface DHCP.
DHCP Lease Scopes shows the DHCP lease scopes for WLAN interfaces in Layer 2 Bridge Mode:
DHCP Lease Scopes
If a bridge-pair does not include a WLAN zone interface, DHCP is passed through the bridge-pair. The SonicOS acts as a DHCP server for WLAN zone interfaces. A DHCP packet received on WLAN zone interface is terminated at the box and passed to the DHCP task. DHCP Packet Path shows the DHCP packet path.
DHCP Packet Path
