Hi,
Just wanted to update this with findings.
So the topology currently of the site was:
2 x Controller connected to Switch then switch trunked to Firewall
On the 2 controllers main VLANs we had an access port. The default gateway of the client networks was the controller (VRRP address) and the default gateway of the controller itself was the firewall.
For clustering I had excluded the 2 client VLANs as it was showing as L3 and not L2.
What we found was the DHCP requests were coming from one client to the DHCP server but then going back it could not find it's way back to the original client.
What I found with the help of TAC was if I changed the controllers main interface to a trunk port and added the client VLANs to trusted VLANs and also changed my config on the switch to be a trunk and included these VLANs I could then set up cluster without excluding the client VLANs - this meant the controller could probe all VLANs on L2 and the DHCP packets were able to find the way to the client.
Is there any issue with adding these client VLANs to the controllers trunk or is it ok as the default gateways of the client VLANs are still set to the VRRP address and the default gateway of the controller is our firewall?
Thanks
Scott