info_i_25x25.png See important information about Ubiquiti Devices and KRACK Vulnerability in this article. We will update this document as more information becomes available.

airMAX - Configure a Point-to-Multipoint (PtMP) ISP-style Access Point

 Overview


This article describes the configuration needed to create a Point-to-Multipoint (PtMP) link.

PtMP links are used routinely to serve up to 100 locations from a single Access Point. There are many approaches to providing PtMP services. This example is the simplest, using a single Ubiquiti radio with an omnidirectional antenna to create a bridged network. Clearly, a more complex approach is often desired, one that uses multiple Ubiquiti radios with sector antennas along with a fully routed (rather than bridged) configuration. That however, is not the scope of this article. Most new users will benefit by starting with this simplified approach to become familiar with PtMP or to serve a smaller, limited area. 

The instructions below offer the configuration for both AC and M devices: the settings are very similar with just small modifications that will be pointed out for each configuration. 

Table of Contents


  1. Network Diagram
  2. Before you begin
  3. Configuration for Radio Labeled 192.168.1.2
  4. Configuration for Radio Labeled 192.168.1.3 - 192.168.1.7
  5. Configuration for the the Cable/DSL Modem
  6. Notes
  7. Related Articles

Network Diagram


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airMAX_205197610.png


Before you begin


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Before following these steps, install a router as shown in the diagram above. Configure it as a DHCP server with an IP pool that is large enough to serve the number of customer devices (e.g. computers, printers, etc.) you need to serve.

 Note: The pool should not extend lower than 192.168.1.21. The instructions for doing this are different for each router manufacturer. Please consult their FAQ for assistance if needed.
  1. Restore your radio to factory default values. This is critical, especially if you are troubleshooting a problem. To perform a reset, press-and-hold the Reset button, power-on, release the Reset button when the lights begin to flash.
  2. Connect the radio to your computer using an Ethernet cable.
  3. Using a web browser, enter 192.168.1.20 as the URL to gain access to the radio's management console.
  4. Enter ubnt as the administration account and ubnt as the password.
  5. This article bases its configuration instructions on the network diagram above, only change the items mentioned, everything else should remain with its default values.

Configuration for Radio Labeled 192.168.1.2 (Access Point)


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 AC Devices M Devices

1. Choose the |Wireless| tab, and only change:

  • Wireless Mode: Access Point PTMP

2. Choose the |Network| tab, and only change:

  • IP Address: 192.168.1.2
  • Click the Save button

1. Choose the |Wireless| tab, and only change:

  • Wireless Mode: Access Point
  • WDS: [X] Enable
  • Click the Change button

2. Choose the |Network| tab, and only change:

  • IP Address: 192.168.1.2
  • Click the Change button
  • Click the Apply button

 


Configuration for Radio Labeled 192.168.1.3 through 192.168.1.3 (Customer Radios)


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 AC Devices M Devices

1. Choose the |Wireless| tab, and only change:

  • Wireless Mode: Station

2. Choose the |Network| tab, and only change:

  • IP Address: 192.168.1.3 (increment by x.x.x.+1 for each additional Customer Radio ... skipping 192.168.1.20)
  • Click Save.

3. Repeat these steps for all Customer Radios

1. Choose the |Wireless| tab, and only change:

  • Wireless Mode: Station
  • WDS: [X] Enable
  • Click the Change button

2. Choose the |Network| tab, and only change:

  • IP Address: 192.168.1.3 (increment by x.x.x.+1 for each additional Customer Radio ... skipping 192.168.1.20)
  • Click the Change button
  • Click Apply.

3. Repeat these steps for all Customer Radios


Configuration for the the Cable/DSL Modem


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If using a Cable/DSL Modem, reboot or power cycle the modem off and on before using this link for the first time.

info_i_25x25.png   Notes


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1. Select the correct cable. Install all outdoor radios using Ubiquiti ToughCable Pro (for routine installations) or Ubiquiti ToughCable Carrier (when co-locating with a high-power VHF or UHF transmitter). If the Access Point will be co-located with high-power VHF transmitters, also use Ubiquiti ToughCable Carrier cable. Use UBNT's supplied Power over Ethernet (PoE) adapters and plug them into properly grounded AC outlets. See our TOUGHCable Datasheet for more information.

2. Configure the Customer Computing Equipment: The router / DHCP server will serve configuration information to all connected computers. Configure computer equipment for "Automatic" configuration.

3. Secure the radios. Modify the default administration account name and password now. From the web management console:

  • Go to System > System Accounts
  • Administrative Username [change it]
  • Hover over icon to the right, Change Password and modify it (for M devices, for AC devices simply Change Password).
  • Click the Change button. Then click the Apply button. (For M devices, for AC devices simply click the Save button)

3. Secure the backbone/distribution wireless network:

  • Go to Wireless > Wireless Security
  • Security > WPA2-AES (do NOT use TKIP, it uses CPU cycles)
  • WPA Preshared Key: enter a strong password
  • Click the Change button. Then click the Apply button. (For M devices, for AC devices simply click the Save button)

Related Articles


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airMAX - How to Configure a Point-to-Point Link (Layer 2, Transparent Bridge)

airMAX - How to Configure an Indirect Point-to-Point (PtP) Link (Bridge, Repeater)