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kfarstrider's avatar
kfarstrider
Aspirant
Apr 28, 2021

R7800 management interface on a different VLAN?

I have two Nighthawk R7800 routers in my house: one on the first floor and one on the second.  The router on the first floor is configured in bridge mode and connects wirelessly to the router on the second floor.  The second floor Nighthawk is in AP mode and connected to a Netgear GS116E switch that has 3 VLANs set up: 10, 20, and 100.  VLAN 100 is the management VLAN, and I would like to have the first floor (bridge) Nighthawk's management interface live there, say with an IP of 192.168.100.5.  However, I would like any devices connected via wire to be in VLAN 10 (and get IP addresses in the 192.168.10.0/24 range).

 

The second floor (AP) Nighthawk's WAN port is connected to a port on the GS116E that has VLANs 10 and 100 assigned (untagged).  The first floor (bridge) router currently has an IP of 192.168.10.5 with the gateway at 192.168.10.1.  So devices connected to this router get IP addresses in the 192.168.10.0/24 range (as desired).  But, when I try to set the router's IP to 192.168.100.5, leaving the gateway as 192.168.10.1, I get an error that says, "invalid gateway."

 

So, is it possible to have the management interface on 192.168.100.0/24 while still keeping connected devices in 192.168.10.0/24?

1 Reply

  • antinode's avatar
    antinode
    Guru
    Apr 28, 2021

    > [...] when I try to set the router's IP to 192.168.100.5, leaving the
    > gateway as 192.168.10.1, I get an error that says, "invalid gateway."

     

       Yes, because that's nonsensical.  A gateway address for a device must
    be on the same subnet as the device itself.

     

       A VLAN does not involve different IP address subnet.

     

    > [...] is it possible to have the management interface on
    > 192.168.100.0/24 while still keeping connected devices in
    > 192.168.10.0/24?

     

       No.  The router's management (web site) interface is always on the
    router's own LAN subnet.

     

       General advice: You might have more success if you described
    (clearly) the actual problem which you are trying to solve, rather than
    asking how to implement some particular "solution" ("VLAN") which may
    have little or nothing to do with the actual problem (whatever it might
    be).