Quickstart Guides – Point-to-Point Quickstart

Point-to-Point Quick Guide

This operating mode can be used to transparently connect two separated segments of a layer 2 network within the same broadcast domain.

In this example, we assume to connect two buildings, each one with its private network. The first one (Building 1) is connected to the Internet through an ADSL link, while the other one (Building 2) does not have a connection to the Internet.
The goal is sharing Building 1 ADSL connection with Building 2, and merge the two private networks into the same one.

1. P2P_1
Fig. 1 – The two buildings without wireless link

In order to establish a connection between the two buildings, without the need of reconfiguring the entire network, you could create a wireless link using two BM100 operated as P2P Master and P2P Slave respectively. When configured as P2P Master/Slave, Bitlomat devices act as a transparent bridge, connecting the ends of the link like an ethernet cable.

2. P2P_2
Fig. 2 – The two buildings equipped with BM100s

We assume that both the private networks use IP addresses in the 10.10.0.0/16 subnet.
The following is a possible scheme of the networks in the buildings:

3. P2P-network-scheme_before
Fig. 3 – Possible scheme of the two private LANs. Devices in Building 2 LAN cannot communicate with Building 1 devices.

 

BM100_1 quick configuration

 

Tip:
It is strongly recommended to stage the units on a testbed, before installing them on the site.

 

Tip:
Always check that the firmware on the device is up-to-date. If not, it is recommended to upgrade the device with the latest provided firmware (Check here).

 

By default, all Bitlomat devices are configured as Base Stations with the default IP address set to 192.168.0.10
First, change the Operating mode from the Main menu.

2

Select the Point-to-Point link option:

5. P2P-selection-screen

Point-to-Point link always consists of a Master device and a Slave deviceSelect the role of the device in the Point-to-Point Link. For BM100_1 choose Link master.
In the same screen, you must fill the WAN settings that represent the layer 3 (IP) configuration of the device. When configured in P2P mode, Bitlomat devices act like transparent L2 bridges. The WAN settings are only necessary to connect to the device in order to configure or monitor it.
The easiest way to configure WAN settings is to choose the Static option in the IP address assignment field and then choose a free address belonging to your subnet (e.g. 10.10.0.100 and 255.255.0.0). This way the device will always take that address at boot, even if there is a DHCP server acting in the network.

Warning:
If there is an active DHCP server in the network, make sure that the address you chose for the BM100 is not in the range used by the DHCP server. You could cause a network failure due to duplicate IP addresses.

 

6. P2P-master-static-screen

Leave the Gateway and Primary DNS fields blank for now, as they are not strictly necessary for the base configuration.
In the last step you must configure Wireless Settings:

  • Country Code (WORLD version only):
    choose the nation in which you are using the device. Each nation has a different list of allowed frequencies. Choosing a wrong country code may cause an illegal operation of the device.
  • Channel width:
    it represents the spectral width of the wireless channel.
  • Frequency/Extension Channel:
    choose one of the channels in the list.
  • SSID:
    choose one SSID for the wireless network.
  • Security:
    choose the security method for the wireless network.

 

Note:
It is recommended to enable security and to override the default SSID.

 

7. P2P-master-wireless

At this point, you must Save and Apply the settings.

 

BM100_2 quick configuration

Change the Operating mode from Base Station to Point-to-Point link.

8. P2P-selection-screen

If you configured BM100_1 as the Link Master, BM100_2 must be configured as the Link Slave. As described above, choose a free IP address for the BM100_2.

9. P2P-slave-static

Configure the Wireless Settings of the BM100_2 accordingly with the BM100_1 (same SSID, Security, passphrase, etc).

10. P2P-slave-wireless

Save and Apply.
In order to verify the configuration of the devices, power up them and connect to the BM100_1 web GUI. In the Wireless Statistics section of the DASHBOARD you should see BM100_2 listed in the Connected devices.

11. dashboard-connected-station

 

Additional settings

 

  • Gateway and DNS:
    are useful if you want the device to be able to reach the Internet itself. There are some Services that may require this. For example, if you activate the NTP service and you configure a public NTP server (e.g. us.pool.ntp.org) the device must be able to connect to the server and to resolve its domain name.
  • IP address assignment:
    another possibility for WAN Settings is to choose the DHCP IP address assignment. If there is an active DHCP server in the network, the devices will take an IP address automatically.
    When you use the DHCP IP assignment method, you must consider that usually the DHCP server assigns addresses randomly, therefore you could not be able to reach your device. Fallback IP address/Netmask will be used as a backup address in case the DHCP server has some issues.

The following is a possible scheme of the final network:

12. P2P-network-scheme_2
Fig. 4 – Possible scheme of the final network. Now devices in the Building 2 LAN (e.g. 10.10.0.59) can communicate with devices in Building 1 LAN (e.g. 10.10.0.80) and access the Internet.