LHG2 bridge IP addressing

RouterOS Wireless Networking
1

Hi all,
I have two Mikrotik LHG2 wireless devices connecting two buildings.

On the near “A end” I have configured the device as a “bridge” and ether1 interface with an IP address.

On the remote “B end” I have configured the device as a “station bridge” and no IP address.

  1. As I’m new to mikrotik, is this topology meant to be layer 2?

Also, I want to configure an IP address on the “B end” for remote management but without interrupting the traffic path.

  1. Which interface on the “B end” device should I configure the IP address on;

ether1

WLAN1

Bridge

  1. Lastly, I want to pass DHCP from the A end Server through the bridge to the B end so that the internet port of a connected MikroTik hAP ac lite gets an IP address, how can this be done?

Many thanks,

Paul

2

If you configure both LHGs so that ether and wireless interfaces are members of same bridge, then the whole wireless hop will be L2 transparent. In that case IP setup on LHGs will only serve for management and (wired) networks on both sides should be served by same DHCP server. Management IP address should definitely go to bridge interface.

If some (or both) LHG2 doesn’t have its ether and wireless bridged together, then you have separate L2 networks and IP interface on such LHG2 is used for routing traffic between both networks.

3

Hi and thank you for your good advice.

If I wanted to create a layer 3 routed point-to-point link rather than a layer 2 bridge what modes should I configure the wireless interfaces as?

Are there any user guides/ documentation for the above?

Thanks again,

Paul

4

If wireless is configured as bridge (i.e. bridge on one end and station bridge on other end), then it is L2 transparent. However, if you actually want routed connection between both networks, you may want to make both LHGs route between wired and wireless. If one is configured transparently (as unit B is), then all broadcast/multicast traffic from that wired network (network B in your case) hits wireless link as well using up some bandwidth only to get blocked by router on the far end of the hop. If also LHG unit B was router, then it would cut that traffic. And in that case the wireless link could be configured also in usual “ap bridge” / “station” manner, but bridge / station bridge is fine as well.

Anyway, if you want to keep your LHG2 config, simply add IP address (from IP subnet B) to bridge interface on LHG2 unit B and you’ll be able to manage it. You can use firewall to limit management access if required, it won’t affect traffic between wired and wireless sides (because bridge deals with it).