Hello,
we are using the MikroTik routerboard heX PoE to route between two networks (192.168.118.0/24 [ether2] and 192.168.115.0/24 [ether3]). The reason is for that routing is that those two networks are at two locations which are connected by a long distance radio link.
Everything was working fine until we discovered that our wireless Gigaset DECT Phones which are using the Gigaset N720 IP PRO Gateways (Base Stations) can only handle one IPv4 network or one broadcast domain. It isn’t possible to configure a standard gateway or something which leads my first solution.
I created a VLAN Interface (802.1q, ID 100) on the Router on the one side (192.168.118.0/24 [ether2]) and bridged it with the other side (192.168.115.0/24 [ether3]). I forwarded the tagged VLAN through the switches to the Base Stations and connected them on untagged Ports of the same VLAN.
With that solution it is possible to call phones in the 192.168.115.0/24 network, but not in the 192.168.118.0/24 network.
This leads us to my question, I thought it is necessary to tell a bit about the background, to make sure you know why I’m asking this.
I thought I create a new IPv4 network 192.168.113.0/24 and move all phones and those Base Stations to this network, delete the previously described VLAN, and then bridge the two interfaces of this router (ether2 and ether3), create some filter rules which make sure that Network Frames from the Source or Destination MAC Address of those Devices (00:90:33:* and 7C:2F:80:*) getting bridged and block all other forwarding traffic (which should make sure all other traffic has to be routed anyway).
Is this possible? Do I have to pay attention to some details? What do you think?
Sincere regards,
HyP3rr