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boehamian
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Joined: Sun Mar 31, 2024 9:01 am

Router OS 7.14.2 DHCP Relay not working

Sun Mar 31, 2024 11:00 am

Good evening all,
I have a mikrotik CRS3328-24p-4s+ running. I have installed a new windows server which I am going to be using to do the DHCP and the DNS. The DNS I am working fine, however in getting the DHCP working I am having some issues with the relay.
For information I have the following networks setup
VLAN 10 - WAN
VLAN 20 - LAN - 10.5.2.0/24
VLAN 30 - Guest Wifi - 10.5.3.0/24
VLAN 40 - HomeBMS - 10.5.4.0/24
VLAN 60 - NOT YET CONFIGURED OR IN USE
VLAN 70 - NOT YET CONFIGURED OR IN USE
VLAN 80 - Core network (network for servers etc) 10.5.2.0/24

My DHCP Server is 10.5.2.10
DNS is 10.5.2.11/10.5.2.12

On the first night I was testing the VLAN 20, but as I was having issues I decided to put the mikrotik back as the DHCP server for the VLAN 20 and VLAN 40 network and just use VLAN 30 to do the testing.
Doing some logging and sniffing it seems the request gets to the relay and the relay seems to forward onto the DHCP server and the DHCP Server seems to send the traffic back to the relay, however the relay does not forward the response from the server back to the client.

According to the DHCP relay, the requests are coming through however it gets no responses. Would I be missing something?

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