Install the Access Point

This chapter contains the stepwise procedure to install the access point (AP).

Zero-Configuration of O-235E as Access Point

Zero-configuration is supported under the following conditions:

  • The device is in AP mode with background scanning on and no SSID configured.

  • A DNS entry wifi-security-server is set up on all the DNS servers. This entry should point to the IP address of the server. By default, the AP looks for the DNS entry wifi-security-server.

  • The AP is on a subnet that is DHCP enabled.

Important: If the AP is on a network segment that is separated from the server by a firewall, you must first open the port 3851 for bidirectional User Datagram Protocol (UDP) and Transport Control Protocol (TCP) traffic on that firewall. This port number is assigned to Arista Networks. Zero-configuration cannot work if multiple APs are set up to connect to multiple servers. In this case, the APs must be configured manually. For details on how to configure an AP manually, see the Access Point Configuration Guide on our website at https://www.arista.com/en/support/product-documentation .

Take a configured AP; that is, ensure that a static IP is assigned to the AP or the settings have been changed for DHCP. Before you install the AP in a hard-to-reach location, note the MAC address and the IP address of the AP for later use. The MAC address is printed on a label at the bottom of the AP.

The steps to install the AP with no configuration (zero-configuration) are as follows:

  1. Pole Mount the AP
  2. Connect External Antennas
  3. Power On the AP
  4. Connect the AP to the Network

Pole Mount the AP

Use the mounting bracket and metal clamps to install the O-235E AP on a pole. Standard accessories include the mounting bracket and two metal clamps.

To mount the AP:

  1. Insert the two metal clamps into the bracket.You can insert the clams either in the horizontal or vertical slots depeding on the position the pole-mount bracket for use on a vertical or horizontal pole.
  2. Fix the bracket to a pole. You can position the pole-mount bracket for use on a vertical or horizontal pole.
  3. Fasten the two metal clamps into the slotted driver.

  4. Mount the AP to the bracket.

  5. Tighten the thumb screw using Philips# 2 screwdriver.
    Table 1. Labels: Parts
    Label Description
    1 Use a Philips #2 screwdriver to fasten the thumb screw.

Power On the AP

Plug one end of the Ethernet cable into the PoE+ switch or compatible PoE injector (a Single-port High Power Midspan, 802.3at compliant, up to Gigabit PoE with 30W minimum power output) and the other end into the LAN1 (PoE+) on the O-235E. Make sure the PoE+ source you are using is turned ON.

Earthing or Grounding: The AP must be properly grounded using a copper earthing wire (12 ~ 10 AWG) and a tin-plated lug as shown in the following image. The wire and the lug must be tightened at the earthing screw on the AP.

Note: O-235E APs are intended to be supplied with UL-listed PoE+ power source suitable for use at 65 degree Celsius, and whose output meets LPS requirements or PS2, with a rating of 48V DC (0.5A minimum).

The following table shows the dimension of the earthing screw and lug.

Item 1 2 3 4 5 6 7 8
Tolerance ± 0.5 ± 0.5 ± 0.5 ± 0.5 ± 0.5 ± 0.2 ± 0.2 ± 0.2
Size 1.0 21.50 5.90 13.0 7.20 4.30 3.40 6.70

Connect the AP to the Network

To connect the access point (AP) to the network, perform the following steps:
  1. Ensure that a DHCP server is available on the network to enable network configuration of the AP.
  2. Add the DNS entry, wifi-security-server, on all DNS servers. This entry must point to the IP address of the server.
  3. Ensure that DHCP is running on the subnet to which the AP is connected.
  4. Check the LEDs on the AP to ensure that it is connected to the server.
  5. Log on to the server using SSH and run the get sensor list command.

    You will see a list of all Arista devices that are recognized by the server. Single Sign-On users can go to the Monitor tab in CloudVision Cognitive Unified Edge and check whether the device is visible under the Monitor tab.

The AP is connected and operational.
Note:If zero configuration fails, the AP must be configured manually.
Important:If DHCP is not enabled on a subnet, the AP cannot connect to that subnet with zero-configuration. If the DNS entry is not present on the DNS servers, or if you do not have the DHCP server running on the subnet, you must manually configure the AP. For details on configuring an AP manually, see the Access Point Configuration guide on our website at https://www.arista.com/en/support/product-documentation .

Connect the AP using PoE

If you are using a PoE injector, make sure the data connection is plugged into a suitable switch port with proper network connectivity.

The following table shows the position of the earthing screw in the access point:

Item Description
1 Earthing screw

Connect External Antennas to O-235E

Connect the external antennas to their respective ports using "N Type" connectors.

Table 2. Labels: Antenna Ports
Label Description
1 Scanning radio, 2.4/5 GHz
2 Access radio, 5 GHz
3 Access radio, 2.4/5 GHz
4 Access radio, 2.4/5 GHz
5 Access radio, 5 GHz
6 Scanning radio, 2.4/5 GHz