Arista W-118 User manual

Quick Start Guide
W-118 Access Point
Arista Networks
www.arista.com
DOC-03485-01

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Chapter 1. About This Guide............................................................................................................3
Chapter 2. Package Content..............................................................................................................4
Chapter 3. W-118 Overview............................................................................................................... 5
Right Panel of W-118...................................................................................................................5
Rear Panel of W-118....................................................................................................................7
Bottom Panel of W-118.................................................................................................................9
Chapter 4. Install the W-118...........................................................................................................11
Mount the W-118.........................................................................................................................11
Power On the W-118...................................................................................................................14
Using the W-118 with Power Adapter................................................................................15
Connect the W-118 to the Network.....................................................................................15
Connect the W-118 using PoE............................................................................................ 16
Chapter 5. W-118 Troubleshooting................................................................................................ 17
Chapter 6. Appendix A: AP-Server Mutual Authentication........................................................18

Chapter 1. About This Guide
This installation guide explains how to deploy the W-118 access point (AP).
Important: Please read the EULA before installing W-118. You can download and read the
EULA from https://www.arista.com/en/support/product-documentation.
Installing the AP constitutes your acceptance of the terms and conditions of the EULA mentioned
above in this document.
Intended Audience
This guide can be referred by anyone who wants to install and configure the W-118 access point.
Document Overview
This guide contains the following chapters:
•Package Content (page 4)
•W-118 Overview (page 5)
•Installing the W-118 (page 11)
•W-118 Troubleshooting (page 17)
Note: All instances of the term 'server' in this document refer to the Wireless Manager, unless
the server name or type is explicitly stated.
Product and Documentation Updates
To receive important news on product updates, please visit our website at https://www.arista.com/
en/support/product-documentation. We continuously enhance our product documentation based on
customer feedback.

Chapter 2. Package Content
The W-118 package must contain the components shown in the figure below.
Figure: W-118 Mounting Accessories
Important: The MAC address of the device is printed on a label at the bottom of the product
and the packaging box. Note down the MAC address, before mounting the device on the ceiling or at
a location that is difficult to access.
If the package is not complete, please contact the Arista Networks Technical Support Team at
[email protected], or return the package to the vendor or dealer where you purchased the
product.

Chapter 3. W-118 Overview
W-118 is a 2x2 MU-MIMO tri-radio 802.11a/b/g/n/ac access point.
This chapter provides an overview of the W-118 and describes:
•Right Panel of the W-118. (page 5)
•Rear Panel of the W-118. (page 7)
•Bottom Panel of the W-118. (page 9)
Right Panel of W-118
The right panel of the W-118 has 6 LEDs that indicate the functioning state of the device.

| 3 - W-118 Overview | 6
Figure: W-118 Right Panel
The following table indicates the device states based on the LEDs.
Table 1. W-118 LED Status Description
LED Status Description
Solid Green Power ONPower
OFF Power OFF
Solid Green Device connected through WAN port (Ethernet port) at 10/100/1000 MbpsUplink
Blinking Green Activity on WAN port
Solid Green No activity on 5 GHz radio5 GHz
Blinking Green Wireless activity on 5 GHz radio

| 3 - W-118 Overview | 7
LED Status Description
Solid Green No activity on 2.4 GHz radio2.4 GHz
Blinking Green Wireless activity on 2.4 GHz radio
Radio 3 Blinking Green Activity on third radio
LAN1/2/3 Solid Green Device connected to LAN port 1/2/3 on the bottom of the device at 10/100/1000
Mbps
Rear Panel of W-118
The rear panel of the W-118 has an Ethernet port labeled WAN, that enables you to connect the
device to a wired LAN through a switch or a hub and provides the power for the device by using the
802.3af standard.

| 3 - W-118 Overview | 8
Figure: W-118 Rear Panel
Table 2. W-118 Rear Panel
Port Description Connector Type Speed/Protocol
PASSTHROUGH This is a wired port that
facilitates extension of
the wired network after
the AP is mounted on the
wall. Another device can
be plugged in to the pass-
through port on the bottom
of the W-118 device. The
traffic on the pass-through
port does not interfere with
the AP traffic. No policies
can be applied on the pass-
through port traffic.
RJ45 -

| 3 - W-118 Overview | 9
WAN Enables you to connect
the device to a wired
LAN through a switch or
a hub. The device can
then communicate with
the server. This port also
provides the power for the
device using the 802.3af
standard
RJ45 10/100/1000 Mbps Ethernet
Power over Ethernet
Bottom Panel of W-118
The bottom panel of W-118 and its corresponding ports are described below.
Figure: W-118 Bottom Panel
Port Description Connector Type Speed/Protocol
DC IN Enables you to connect
to and power on device
using 12 V DC power with 2
ampere.
5.5mm overall
diameter/2.1mm center pin/
hole
--
Pass-through port The pass-through port is
used to plug in a device into
another wired port that is
available on the wall where
the AP is installed. The
pass-through port at the
rear of the device and pass-
through port on the bottom
of the device are internally
connected.
RJ45 --
Ethernet (LAN3/PSE) Gigabit Ethernet port that
can be used for wired
extension for an SSID. This
port also provides the power
for the device using the
802.3af standard
RJ45 10/100/1000 Mbps Gigabit
Ethernet

| 3 - W-118 Overview | 10
Ethernet (LAN2) Gigabit Ethernet port that
can be used for wired
extension for an SSID.
RJ45 10/100/1000 Mbps Gigabit
Ethernet
Ethernet (LAN1) Gigabit Ethernet port that
can be used for wired
extension for an SSID.
RJ45 10/100/1000 Mbps Gigabit
Ethernet
Reset Resets the W-118 device
to factory defaults. To
reset the device, press and
hold the Reset Pin Hole
until all LEDs go off which
indicates that the device
has rebooted. Pressing the
Reset Pin Hole while the
device is booting up will not
have any effect. You should
perform this operation only
when the device is running.
Pin hole push button Hold down and power cycle
the device to reset
When you reset the device, the following settings are reset:
•Config shell password is reset to config.
•Server discovery value is erased and changed to the default, wifi-security-server.
•All the VLAN configurations are lost.
•If static IP is configured on the device, the IP address is erased and DHCP mode is set. The
factory default IP address of the device is 169.254.11.74.

Chapter 4. Install the W-118
This chapter contains the stepwise procedure to install the W-118 device.
Zero-Configuration of W-118 as Access Point
Zero-configuration is supported under the following conditions:
•The device has 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 device looks for the DNS entry wifi-security-
server.
•The device is placed on a subnet that is DHCP enabled.
Important: If the device is placed on a network segment that is separated from the server by
a firewall, you must first open port 3851 for User Datagram Protocol (UDP) and Transport Control
Protocol (TCP) bidirectional traffic on that firewall. This port number is assigned to Arista Networks.
If multiple devices are set up to connect to multiple servers, zero-configuration is not possible. In
this case, you must manually configure the APs. See the Access Point Configuration Guide on our
website at https://www.arista.com/en/support/product-documentation .
Take a configured W-118, that is, ensure that a static IP is assigned to the device or the settings have
been changed for DHCP. Note down the MAC address and the IP address of the device in a safe
place before it is installed in a hard-to-reach location. The MAC address of the device is printed on a
label at the bottom of the product.
The steps to install the device with no configuration (zero-configuration) are as follows:
1. Mount the device. (page 11)
2. Power On the device. (page 14)
3. Connect device to the network. (page 15)
Mount the W-118
The steps to mount the W-118 are as follows:
1. Attach the mounting bracket to the wall by using the mounting hardware kit as shown in the
image below.

| 4 - Install the W-118 | 12
2. Affix the mounting bracket on to the wall using the appropriate screws from the mounting
accessories included in the package.
3. Connect the cables to the appropriate ports in the rear-side of the device.

| 4 - Install the W-118 | 13
4. Mount the device on the bracket by aligning the two notches on the bracket with the two
grooves on the rear panel of the device. Slide the device and tighten it onto the bracket with the
screw provided in the package.

| 4 - Install the W-118 | 14
Important: To prevent disconnection or tampering by unauthorized personnel, it is
extremely important to install the device such that it is difficult to unplug the device from the
network or from the power outlet.
Note: You should label the devices using MAC addresses or at least your own convention.
For example, use serial numbers, so that you can easily identify the devices.
Power On the W-118
The W-118 device can be powered on by plugging one end of the Ethernet cable into the PoE
(802.3af) switch or injector and the other end into the Ethernet/PoE port on the W-118. Ensure the
PoE source you are using is turned ON.

| 4 - Install the W-118 | 15
As an alternative to PoE, you can insert a compatible power adaptor plug into an AC power outlet
and the other end into the power input port on the W-118.
Note: If you are not using PoE, ensure that you use only an AC power adaptor supported by the
W-118 access point (AP).
Using the W-118 with Power Adapter
To power up the device with power adapter, perform the following steps:
1. Plug the power cable into the DC power receptacle at the rear of the device.
2. Plug the other end of the power cable into an 110V~240V 50/60 Hz AC power source.
3. Wait until the device is ready. Refer to the LED details table.
Connect the W-118 to the Network
To connect W-118 to the network, perform the following steps:
1. Ensure that a DHCP server is available on the network to enable network configuration of the
W-118.
2. Add the DNS entry wifi-security-server on all DNS servers. This entry should point to the IP
address of the server.
3. Ensure that DHCP is running on the subnet to which the device will be connected.
4. Check the status LEDs on the device. If all LEDs glow green, then the device is operational and
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 Devices tab in Wireless Manager and check whether the device is visible under the
Devices tab.
The device is connected and ready to go operational.
Note: If the zero configuration is not successful, the device must be configured manually.
Important: If DHCP is not enabled on a subnet, the device 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 device. See the Access Point
Configuration guide on our website at https://www.arista.com/en/support/product-documentation .

| 4 - Install the W-118 | 16
Connect the W-118 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.

Chapter 5. W-118 Troubleshooting
The table below lists some of the troubleshooting guidelines for W-118.
Diagnosis Solution
The device did not receive a valid IP address via the
DHCP.
Ensure that the DHCP server is On and available on the
VLAN/subnet to which the device is connected. If the
device still fails to get a valid IP address, you can reboot it
to see if the problem is resolved.
The Ethernet cable is loose. The device is probably
disconnected from the network.
Ensure that the Ethernet cable is connected.
Unable to connect to the server. Ensure that the server is running and is reachable from
the network to which the device is attached. If there is a
firewall or a router with ACLs enabled between the device
and the server, ensure that the traffic is allowed on UDP
port 3851. Use the server IP-based discovery and ensure
that you have correctly entered the DNS name, wifi-
security-server , on the DNS server. Also, ensure that the
DNS server IP addresses are either correctly configured
on the, or are provided by the DHCP server. It is also
possible that the AP is unable to connect to the server
because it has failed to authenticate with the server. In this
case, an 'Authentication failed for ' event is raised on the
server. Refer to the event for recommended action.
The AP has encountered a problem. If you are using Arista Cloud Services, then open the TCP
port 443 (SSL). If you have an on-premises installation,
then open the ports UDP 3851 and port 80. If you are
using a Proxy, Web Accelerator or URL Content Filter in
between the AP and the Internet, ensure the settings allow
communication between the AP and Arista Cloud Services.
If your configuration requires you to specify an exact IP
address or IP range for Arista Cloud Services, please
contact Technical Support at [email protected].

Chapter 6. Appendix A: AP-Server Mutual
Authentication
The AP-server communication begins with a mutual authentication step in which the AP and server
authenticate each other using a shared secret. The AP-server communication takes place only if this
authentication succeeds.
After the authentication succeeds, a session key is generated. All communication between the AP and
server from this point on is encrypted using the session key.
The AP and server are shipped with the same default value of the shared secret. The CLI commands
are provided on both server and AP for changing the shared secret.
Note: After the shared secret (communication key) is changed on the server, all APs connected
to the server will automatically be set up to use the new communication key. APs that are not
connected to the server at this time must be manually set up with the same communication key to
enable communication with this server.
Note: Although the server is backward compatible, that is, older version APs can connect to a
newer version server, this is not recommended.