I've configured DHCP relay on the FTD and I have a 2nd FTD as a backup default gateway. x.x.x.1 and x.x.x.2 respectively. However something is wrong. When I enabled DHCP relay on the .1 FTD only, the DHCP relay wouldn't work and then I enabled this on the .2 FTD, it now works. I want to know why its not working w/ the .1 FTD. I realize that its probably an access-list issue and I can probably just mirror the configuration from the .2 to the .1 but I really want to troubleshoot the issue, not just get it to work.
I've enabled WireShark on the client and I can see the initial DHCP Discover packets was going out. I realize that there are some ancillary data that I can collect but to just see the packets reach the FTD interface and see the FTD process kick in is important to me. Its a premier FW and I should be able to see the FW process the DHCP packets.
I'm aware that the DHCP process (DORA) in the discovery phase lists the source as 0.0.0.0:67 and the destination as 255.255.255.255:68. Is there a way to capture DHCP packets for troubleshooting purposes?
