01-29-2024 10:10 AM
Hello. Maybe my understanding of the DHCP relay feature is wrong but let me try to explain what I want to get.
Current setup with general broadcast DHCP
Two SSID:
Everything is connected through a switch to MikroTik there I have a DHCP server
Everything works as expected:
DHCP Relay
I hope that I understand correctly how it should work (AP works as relay agent):
Looks like that should work better than broadcast. However, without DHCP relay it works well so I'm just curios if it's possible to setup.
Solved! Go to Solution.
01-29-2024 12:53 PM
No, the DHCP relay is only configured in devices that works in L3. The AP works in L2.
We have the option "Directed MC/BC Threshold" that reduces multicast and broadcast traffic, but it doesn't apply to DHCP and ARP traffic:
https://docs.commscope.com/bundle/unleashed-200.9-onlinehelp/page/GUID-92FB1860-3276-4819-8A0F-78116...
01-29-2024 11:30 AM
Hello,
The DHCP relay is configured in the L3 device of your network.
The DHCP relays is used when your DHCP server is not in the same broadcast domain as your clientes.
E.G:
SSIDs:
Server DHCP is on:
Since the DHCP server is not in the same broadcast domain as VLANs 10 and 20, you use the DHCP relay functionality on the L3 device (likely a router or layer 3 switch) in each VLAN. This allows the L3 device to forward DHCP requests from clients in VLANs 10 and 20 to the DHCP server in VLAN 30.
The DHCP relay agent typically adds information to the DHCP request packet, such as the original subnet from which the request came. This information helps the DHCP server to assign an IP address from the correct pool for the requesting subnet.
I hope this clarify the DHCP relay usage for you.
01-29-2024 11:43 AM
Yep. I know that the main reason for a DHCP relay is to have a DHCP server in another broadcast domain.
BTW, using the same technology AP can avoid broadcast traffic, can't it? I suppose that option 82 can be used instead of many DHCP servers.
01-29-2024 12:53 PM
No, the DHCP relay is only configured in devices that works in L3. The AP works in L2.
We have the option "Directed MC/BC Threshold" that reduces multicast and broadcast traffic, but it doesn't apply to DHCP and ARP traffic:
https://docs.commscope.com/bundle/unleashed-200.9-onlinehelp/page/GUID-92FB1860-3276-4819-8A0F-78116...
04-21-2024 10:58 PM
Do we have to configure static route as well for , considering dchp relay configure on wireless controller zone director. I have similar network architecture and posted the actual issue here https://community.ruckuswireless.com/t5/Access-Points-Indoor-and-Outdoor/Assistance-Needed-Configuri...