please help - question how-to

Discussion in 'Tomato Firmware' started by michael007, Aug 9, 2017.

  1. michael007

    michael007 New Member Member

    Hi all thought i'd reach out to you with 2 questions i have. 1 is there a possibility to have tomato have a failover wan to wifi? it can be big help say for a temp fix to lift the network from a friend close by or with 4G. also, i can never understand what the "tag" means in vlan. i can see you can enable a port then also right to the right of it tag it, can anyone please explain? thank you so much!
  2. txnative

    txnative Networkin' Nut Member

    Not sure what you are asking on the first question, your wanting a way to have the wan to switch to wifi? I'd like to say if you asking the if the wan can be configured other than dhcp, then yes you can configure it to a 3g modem or 4g/LTE tethering usb dongle. vlan tagging isn't that difficult there some tutorials here and if you google you'll find how to set one up. Sometimes you'd like to give some guests access to wifi without having to give them access to your private or home network, so you would take a port from the vlan separate it from the network give a tag to a wireless ssid that isn't the same as your private or home network and give a different password, there are tutorials on this as well.
  3. Monk E. Boy

    Monk E. Boy Network Guru Member

    I think he wants to failover from his normal WAN connection to a WiFi client connection to another WiFi network, however the 4G would seem to indicate failing over to a cellular connection. I think we're going to need a better description.

    Tagging in VLAN terms means modifying the packets coming out that port so they are tagged with the VLAN. This requires whatever is attached to that port must also be configured to support tagging on that VLAN. Basically by tagging packets this way you can run multiple VLANs over a single port, so you can have multiple networks running through a single port on the router. The downside is that whatever's connected to that port needs to either be a smart switch that can also tag/untag the packets, another router that supports VLAN tagging, or a client that similarly supports VLAN tagging (not all do). If all networks are tagged on a specific port and you connect a normal system to that port, it will not be able to connect to any of those networks - normal systems (e.g. Windows, OS X) talk in "untagged" mode by default, meaning they can only participate in a single untagged network.

    If you had a guest network and your primary network and you wanted to have both networks available on a second router but didn't want to run two ethernet ports between them and tie up two ports on both routers, you could tag both networks on a single port on both routers then run a single ethernet cable between those two ports. At that point devices attached to other ports (or wireless networks) on the two routers would be able to see the devices at the other end, despite only a single ethernet connection connecting them.

    So untagged = normal connection, single VLAN. tagged = tagged connection, multiple VLANs. It's a little more complicated than this but for simplicity's sake this should do.
  4. rs232

    rs232 Network Guru Member

    Not tring to be funny, but can you please edit the title of this thread to be more specific and relevant to your questions? e.g. remove "please help"
    This will attract more attention.

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