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Thread: print to another subnet with network printer connected to a second router?

  1. #1
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    print to another subnet with network printer connected to a second router?

    I would like to do that.
    I plugged the Linksys SPS router into the 4 port router.
    It connects and gets an IP and assigns 192.168.0.3 to the network laserjet 4000 printer.

    However, I can not ping that address and ubuntu can not find the printer.

    So what to do?
    I include a diagram to show how I would like to hook up the connections.
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  2. #2
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    Re: print to another subnet with network printer connected to a second router?

    Quote Originally Posted by sdowney717 View Post
    I would like to do that.
    I plugged the Linksys SPS router into the 4 port router.
    It connects and gets an IP and assigns 192.168.0.3 to the network laserjet 4000 printer.

    However, I can not ping that address and ubuntu can not find the printer.

    So what to do?
    I include a diagram to show how I would like to hook up the connections.
    Why are you using a second router? A typical subnet for home or small business can handle 254 devices needing IP addressing. If you only need more LAN ports I would add a 4 or 8 port switch. Just plug the switch into the port that you have the second router plugged into now and the printer into one of the switch ports. The printer should be on the same original subnet and available to all computers in that network subnet.

  3. #3
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    Re: print to another subnet with network printer connected to a second router?

    When you say "another subnet" it sounds like you are probably connected to the WAN side of the Linksys SPA router which does NAT for the printer on its LAN side. In that case to connect to the printer you would need to connect to the WAN IP of the Linksys SPA as the printer IP and configure port forwarding on the Linksys SPA to forward ports for whichever printer protocols you are using to the LAN IP of the printer.

    That can work, but as mentioned it would be easier to use a network switch and have everything on the same subnet.
    i5 650 3.2 GHz, 8 GB, nvidia GTX 1060, 32" 1080p & assorted older computers

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    Re: print to another subnet with network printer connected to a second router?

    Just thinking of working with the hardware I have now.
    I currently have the linksys SPA voip router hooked to 4 port router with the win7 pc running off the linksys.
    This causes in networking gui the machines to be invisible to each other, no icon, although I can get to them by typing in their IP number.

    Could you turn off DHCP in the linksys voip router, then the 4 port router will be supplying the IP numbers?

    Port forwarding for printing which ones? Interesting to try and you say the printer config in ubuntu would be the IP number of the Linksys. I dont know what protocols I do see where you can enter port numbers in the Linksys, udp and a lot of options.

  5. #5
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    Re: print to another subnet with network printer connected to a second router?

    A network switch would be my solution as well ( It's always hard to argue with redmk2 ) so turn one of your routers into a switch by enabling "Bridge Mode" on that router which affectingly turns off the DHCP server on that router. Now the bridged router acts as a switch extending the ports available to the other router and everyone ends up in the same subnet. I do this on my own network. I have an antique wired router and has as one input a wireless router in bridged mode acting as a Wireless Access Point - a switch.

    I'm not familiar with the Linksys router ( or any Linksys router ) so I don't know if it can do that but perhaps you can rearrange things a bit as far as which router connects to the internet the other router can be set to bridge mode.

  6. #6
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    Re: print to another subnet with network printer connected to a second router?

    Did a quick search and found this HowTo on setting up a Linksys SPA in bridge mode so it appears it can be done at least for this model number:
    http://www.cisco.com/en/US/products/...80a35e85.shtml

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    Re: print to another subnet with network printer connected to a second router?

    Ok, put it in bridge mode which is it turns off DHCP

    This is the SPA Linksys page screenshot now. I tried putting in the Linksys LAN to match the 4 port router but it always sets to a different subnet, in this case 192.168.2.1
    If it is turning off DHCP, why would it put anything in there.
    Could it be this Linksys SPA 2102 can not do this?

    My 4 port router is assigning IP's from 192.168.1.100 and up

    So then how do you assign an IP address to the HP Laserjet 4000TN?
    Would the manually assigned IP have to be say 192.168.1.115?
    Looks like has to be manually assigned? Which I looked into before and supposedly can be done, but my printer options did not match the web site instructions.
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  8. #8
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    Re: print to another subnet with network printer connected to a second router?

    ok, there is an admin login to the router
    I did that and I get some more options

    under networking service you can set to
    NAT
    BRIDGE
    AUTO

    so I tried bridge this time
    and now can also set LAN this time to 192.168.1.50 with 50 leases

    And now it is working! I can see the printer at 192.168.1.102
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  9. #9
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    Re: print to another subnet with network printer connected to a second router?

    Here is screenshot showing network able to view machines
    This is much better, less confusing, which was the goal.

    So if you have SPA2102, you have to
    log in with admin
    goto Lan setup
    select BRIDGE
    set LAN IP's to a range which will fit in with your router farther upstream, a range of IP with same subnets but differnt last digits as you dont want issues.

    You wont get the NAT-Bridge-Auto option unless you log in as an admin.

    This actually does not solve printing to another subnet in my LAN, I solved by adjusting my routers to work in the same subnet.
    My Home theater PC downstairs also has another 4 port router, but I dont care to ever print, just watch internet videos and it works well.
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    Last edited by sdowney717; November 15th, 2012 at 02:21 PM.

  10. #10
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    Re: print to another subnet with network printer connected to a second router?

    Quote Originally Posted by sdowney717 View Post
    This actually does not solve printing to another subnet in my LAN...
    The reason is: there is no route to the 2nd subnet from the first subnet. The 2nd subnet would also need its own interface (i.e. eth1).

    In non technical terms, when you send traffic with the destination unknown to router (not in the routing table) the router sends that traffic to the default gateway. In your case it goes to the WAN side (the internet side) and is dropped. No private IP addresses are routed on the internet (e.g 192 or 172.16 or 10).

    Edit: A router is a device that is the gateway from one subnet to another. When you have multiple subnets they are, by design, separated by routers. The device that you are calling a router is actually 2 devices. The router and an integrated switch. When you use "bridge mode" you are tuning off all routing functions and the networking services (DHCP and DNS).
    Last edited by redmk2; November 15th, 2012 at 07:38 PM.

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