Controller Based WLANs

Q:

DHCP packet flow with bootp flag set to broadcast vs unicast

Case 1:

If the bootp flag is set to unicast in the DHCP DISCOVER packet, then the destination IP in the OFFER & ACK packet is set to client IP.

1.  DHCP DISCOVER packet.

2. DHCP OFFER

3. DHCP ACK.

Case 1:

If the bootp flag is set to broadcast in the DHCP DISCOVER packet, then the destination IP in the OFFER & ACK packet is set to 255.255.255.255.

DHCP DISCOVER:

DHCP OFFER:

DHCP ACK:

Note: DHCP request packet is always sent as broadcast.