Description:
This document describes how you can connect two local networks via WLAN by means of an intermediate network.


Requirements:


Scenario:
In a company building, LAN-A with the address range 192.168.1.0/24 is operated on the ground floor. LAN-B with the address range 192.168.2.0/24 is operated one floor up.
These two networks are to be interconnected. Due to infrastructure reasons, no Ethernet cable can be laid, so the networks are to be interconnected via WLAN. For this purpose, a LANCOM WLAN router or access point is located in each local network.
The WLAN routers or access points are connected via a point-to-point link. Then an intermediate network (here: Transfer Net) with the IP address range 10.0.0.0/24 is configured between the devices.



Procedure:
1) Configuring the point-to-point link:
1.1) Set up a point-to-point link between the LANCOM WLAN routers or access points. For a detailed description, see this Knowledge Base article.


2) Setting up the intermediate network:

2.1) Open the configuration of the WLAN router/access point in LAN-A in LANconfig and go to the menu TCP/IP (or IPv4) → General → IP networks.

2.2) Click on the button Add... to configure a new IP network:

    • In the Network name field enter the name of TRANSFER_NET, for example.
    • In the IP address field, enter the IP address to be given to the LAN-A WLAN router/access point in the transfer/intermediate network. In this example, this is the IP address 10.0.0.1.
    • Set the netmask to 255.255.255.0.
    • Set the Interface assignment field to the point-to-point interface P2P-1-1.
2.3) Open the configuration of the INTRANET network and set the interface assignment to BRG-1.
2.4) Open the configuration of the WLAN router/access point in LAN-B and go to the menu TCP/IP (or IPv4) → General → IP networks.
2.5) Click on the button Add... to configure a new IP network:
  • In the Network name field enter the name of TRANSFER_NET, for example.
  • In the IP address field, enter the in the intermediate (transfer) network IP address to be given to the WLAN router/access point in LAN-B. In this example, this is the IP address 10.0.0.2.
  • Set the netmask to 255.255.255.0.
  • Set the Interface assignment field to the point-to-point interface P2P-1-1.
2.6) Open the configuration of the INTRANET network and set the interface assignment to BRG-1.
2.7) In the routing table of the LANCOM WLAN router/access point in LAN-A, a route must be configured to LAN-B.
  • In the IP address field, enter the network address of LAN-B. In this example, this is the IP address 192.168.2.0.
  • Set the netmask to 255.255.255.0.
  • In the Router field, enter the intermediate (transfer) network IP address of the LANCOM WLAN router/access point in LAN-B. In this example, this is the IP address 10.0.0.2.
2.8) In the routing table of the LANCOM WLAN router/access point in LAN-B, a route must be configured to LAN-A.
  • In the IP address field, enter the network address of LAN-A. In this example, this is the IP address 192.168.1.0.
  • Set the netmask to 255.255.255.0.
  • In the Router field, enter the intermediate (transfer) network IP address of the LANCOM WLAN router/access point in LAN-B. In this example, this is the IP address 10.0.0.1.
2.9) For the WLAN router/access point on LAN-A and for the WLAN router/access point on LAN-B, open the menu Interfaces → LAN → Port table → P2P-1-1.
2.10) Set the value in the Bridge group field to none.
2.11) Write the configuration back to the WLAN router/access point on LAN-A and the WLAN router/access point on LAN-B respectively.
2.12) This completes the configuration.