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css326 DHCP Snooping
Posted: Tue Jun 05, 2018 5:21 pm
by onur
how can i enable DHCP on only one port?
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.
regards, onur
Re: css326 DHCP Snooping
Posted: Thu Jun 07, 2018 4:27 pm
by EdPa
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.
Re: css326 DHCP Snooping
Posted: Sun Oct 10, 2021 8:23 pm
by leeph
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.
Please address this in SWOS 2.14.
Re: css326 DHCP Snooping
Posted: Fri Dec 03, 2021 2:23 pm
by redax
This is soo disappointing, please fix this for the next SwOS release, please.
BTW, when will there be a new release for the CSS326 line?
regards,
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.
Please address this in SWOS 2.14.
Re: css326 DHCP Snooping
Posted: Fri Dec 03, 2021 2:31 pm
by redax
by the way, if "Add Information Option" is unchecked, the dhcp snoopings seems to be working with VLANs