QOS and DHCP Inquiry (1st router dedicated for QOS and 2nd for DHCP)

Discussion in 'Tomato Firmware' started by heliosfiend, Nov 3, 2018.

  1. heliosfiend

    heliosfiend Reformed Router Member


    I have 2 routers an WRT160N v3 and a N66U (both have tomato installed), I would like to make the N66U as a dedicated QOS router then use my WRT150N for DHCP on LAN/WIRELESS.

    Is this possible? I cant seem to find anything like this from the forum if there is one maybe I missed it.

    Thank you.
  2. rs232

    rs232 Network Guru Member

    So let's say QoS router is and DHCP router

    On the DHCP router itself point the default gateway to and for its clients perhaps a good idea to add something like this under Advanced DHCP/DNS/custom config:


    To point the DNS clients towards the QoS router too add also:

    NOTE on the DHCP router: this device "should" be set to Advanced/Routing/mode = Router (not gateway) AND if you're running a version of tomato that has "that bug" (http://www.linksysinfo.org/index.php?threads/fork-freshtomato-mips.74145/page-4#post-299060) you would need this http://www.linksysinfo.org/index.php?threads/fork-freshtomato-mips.74145/page-4#post-298686
  3. Sean B.

    Sean B. Network Guru Member

    I concur with @rs232 's suggestions, except for switching to router mode. If you search the forum you'll find many posts like this:

    From knowledgeable members. Router mode often causes problems, and Gateway mode will work just fine in either use case.
  4. rs232

    rs232 Network Guru Member

    I suppose what it does it will disable masquerading also most likely will break upnp if communication go via the DHCP router. As mentioned in other posts there's an overlapping in configuration between having to set the device in router mode and e.g. having to assign the wan port to br0 manually.

    None-than less I have to agree, there are few obscure side effects related to having the device in router mode. Perhaps a good time to look into all the references (at code level) of this obsolete parameter?
    Sean B. likes this.
  5. heliosfiend

    heliosfiend Reformed Router Member

    I won't be able to test it today. but will read through the links provided above. will report back if I faced some confusion along the way.

    Thank you for the awesome information. :)
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