on System Tab i can set DHCP & PPPoE Snooping - Trusted Ports.
this is not working as accepted.
i want to enable only one DHCP server on one Port (in my setup Port 24).
when doing this - DHCP is not working anymore.
i have to enable also client ports as trusted - but this makes no sense.
We have found that there is a software issue with DHCP Snooping when you use VLAN for your access ports. When VLAN tags are not used, DHCP Snooping should work as expected. The fix will be included in following SwOS releases.
It’s now 2021 and DHCP snooping when using VLANs still doesn’t work… my DHCP server runs inside a VMWare ESXi virtual machine on a distributed virtual switch (dVS) across most of my VLANs that are set up on the Mikrotiks.If I try to restrict to only the ESXi interfaces where the DHCP server lives, everything goes haywire - I even saw a kind of DHCP loop today while testing it. The only way it works is if every port is Trusted. There should be a way to turn this feature off entirely, especially if it doesn’t work. The SWOS manual is also WOEFULLY short of information about what it does. There’s literally no information at all on the PPPoE ‘snooping’ side of it.