Hi,

I would like to assign different subnet to devices connecting to my switch/router Mikrotik (RouterOS v6.40).

To avoid devices connected on subnet 1 to reach devices on subnet 2 and moreover to disable access to the WWW on one of those two subnet

diagram

Is it possible with RouterOS to set the DHCP server to lease two set of ip (subnet) base on a Whitelist, meaning if a device is on the white list it get subnet1 if not subnet2 ?

Or do you have more practical solutions ?

Thanks.

  • @[email protected]English
    2•3 months ago

    Mikrotiks normally have hardware acceleration for VLANs and switching for only 1 bridge. Beyond that, traffic has to go through the CPU.

    Multiple bridges were one of the old ways, before hardware offloading.

    The way to do it is to have 1 bridge, register the vlans on the bridge, tag/untag all the bridge ports as appropriate, set PVIDs as appropriate. Add 2 VLAN interfaces (this gives the CPU access to the VLAN), add static IPs to the vlan interfaces, set up DHCP appropriately.
    Always worth taking a backup of the config, then enable hardware offloading last. If you end up locking yourself out, reset and reload the config, figure out what you did wrong.

    • @NogamiEnglish
      2•3 months ago

      Enable safe mode too? If there’s a problem while in safe mode just power cycle the router and the last good config before safe mode enables should come back up.

      I’d still do a backup in addition to play it safe though.