Aruba AirWave Guida utente

AirWave 8.3.0

Best Practices Guide

Copyright Information

Open Source Code

This product includes code licensed under the GNU General Public License, the GNU Lesser

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copy of the source code corresponding to such code is available upon request. This offer is valid

to anyone in receipt of this information and shall expire three years following the date of the final

distribution of this product version by Hewlett-Packard Enterprise Company. To obtain such

source code, send a check or money order in the amount of US $10.00 to:

Hewlett-Packard Enterprise Company

Attn: General Counsel

6280 America Center Drive

San Jose, CA 95002

USA

AirWave 8.3.0 | Best Practices Guide Contents | 3

Contents

Contents 3

Contacting Support 4

Terminology Change 4

Overview 5

Understanding Aruba Topology 5

Prerequisites for Integrating Aruba Infrastructure 5

Configuring AirWave for Global Aruba Infrastructure 7

Disabling Rate Limiting in AMP Setup > General 7

Entering Credentials in Device Setup > Communication 8

Setting Up Recommended SNMP Timeout and Retries 9

Setting Up Time Synchronization 10

Enabling Support for Channel Utilization And Statistics 10

Configuring anAruba Group 15

Basic Monitoring Configuration 15

Advanced Configuration 16

Discovering Aruba Infrastructure 17

Discovering or Adding Conductor Controllers 17

Local Controller/Managed Devices Discovery 19

Thin AP Discovery 19

AirWave and Aruba Integration Strategies 21

Integration Goals 21

Example Use Cases 21

Prerequisites for Integration 22

Define AirWave as a Trap Host Using the ArubaOS CLI 22

Aruba Specific Capabilities 25

Aruba Traps for RADIUS Auth and IDS Tracking 25

Remote AP Monitoring 26

ARM and Channel Utilization Information 27

Viewing Controller License Information 32

Rules-Based Controller Classification 32

Changing RAPIDS Based on Controller Classification 33

Best Practices for Switch Setup 34

Instant AP and Instant GUI Config 35

Best Practices while Using VisualRF 36

AirWave Data Acquisition Methods 39

Increasing Location Accuracy 45

Understand Band Steering's Impact on Location 45

Leveraging RTLS to Increase Accuracy 45

Contacting Support

Main Site arubanetworks.com

Support Site asp.arubanetworks.com

Airheads Social Forums and Knowledge

Base

community.arubanetworks.com

North American Telephone 1-800-943-4526 (Toll Free)

1-408-754-1200

International Telephone arubanetworks.com/support-services/contact-support/

Software Licensing Site lms.arubanetworks.com

End-of-life Information arubanetworks.com/support-services/end-of-life/

Security Incident Response Team (SIRT) Site: arubanetworks.com/support-services/security-bulletins/

Email: [email protected]

Terminology Change

As part of advancing HPE's commitment to racial justice, we are taking a much-needed step in

overhauling HPE engineering terminology to reflect our belief system of diversity and inclusion.

Some legacy products and publications may continue to include terminology that seemingly

evokes bias against specific groups of people. Such content is not representative of our HPE

culture and moving forward, Aruba will replace racially insensitive terms and instead use the

following new language:

Usage Old Language New Language

Campus Access Points + Controllers Master-Slave Conductor-Member

Instant Access Points Master-Slave Conductor-Member

Switch Stack Master-Slave Conductor-Member

Wireless LAN Controller Mobility Master Mobility Conductor

Firewall Configuration Blacklist, Whitelist Denylist, Allowlist

Types of Hackers Black Hat, White Hat Unethical, Ethical

Chapter 1

Overview

This document provides best practices for leveraging AirWave to monitor and manage your Aruba

infrastructure, which provides a wealth of functionality such as firewall, VPN, remote AP, IDS, IPS, and

ARM, as well as an abundance of statistical information.

Follow the simple guidelines in this document to garner the full benefit of your Aruba infrastructure.

This overview chapter contains the following topics:

nUnderstanding Aruba Topology

nPrerequisites for Integrating Aruba Infrastructure

Understanding Aruba Topology

Figure 1 depicts a typical conductor-local deployment for the AirWave Wireless Management System

(AWMS):

Figure 1 Typical Aruba Deployment

There should never be a local controller managed by an AirWave server whose conductor controller is

also not under management.

Prerequisites for Integrating Aruba Infrastructure

In order to integrate your Aruba infrastructure, you need the following information:

nSNMP community string for monitoring and discovery

nTelnet/SSH credentials for configuration

nEnable password for configuration

Without proper Telnet/SSH credentials, AirWave will not be able to acquire license, serial information,

and monitoring schema from controllers.

AirWave 8.3.0 | Best Practices Guide 5

Chapter 2

Configuring AirWave for Global Aruba

Infrastructure

Configuring AirWave for Global Aruba Infrastructure

This section explains how to configure AirWave to globally manage your Aruba infrastructure.

nDisabling Rate Limiting in AMP Setup > General

nEntering Credentials in Device Setup > Communication

nSetting Up Recommended SNMP Timeout and Retries

nSetting Up Time Synchronization

nEnabling Support for Channel Utilization And Statistics

Disabling Rate Limiting in AMP Setup > General

The SNMP Rate Limiting for Monitored Devices option adds a small delay between each SNMP GET

request, which results in the actual polling intervals that are longer than what is configured. For

example, setting a ten-minute polling interval will result in an actual 12-minute polling interval. Disabling

rate limiting is recommended in most cases unless you are using legacy Aruba devices, such as M2

devices.

To disable rate limiting in AirWave, follow these steps:

1. Navigate to AMP Setup > General.

2. Locate the Performance section.

3. In the SNMP rate limiting for monitored devices field, select No, as shown in Figure 2.

4. Click Save.

AirWave 8.3.0 | Best Practices Guide 7

8|AirWave 8.3.0 | Best Practices Guide

Figure 2 SNMP Rate Limiting in AMP Setup > General > Performance

Entering Credentials in Device Setup > Communication

AirWave requires several credentials to properly interface with Aruba devices. To enter these

credentials, follow these steps:

1. Navigate to Device Setup > Communication.

2. In the Default Credentials section, click Edit link next to Aruba. The page illustrated in Figure 3

appears.

3. Enter the SNMP Community String.

Be sure to note the community string because it must match the SNMP trap community string.

Refer toDefine AirWave as a Trap Host Using the ArubaOS CLI.

AirWave 8.3.0 | Best Practices Guide Configuring AirWave for Global Aruba Infrastructure | 9

Figure 3 Credentials in Device Setup > Communication

a. Enter the required information for configuration and basic monitoring:

nTelnet/SSH user name

nTelnet/SSH password

nEnable mode password

4. Click Save.

Setting Up Recommended SNMP Timeout and Retries

1. In the Device Setup > Communication page, locate the SNMP Settings section.

2. Change the SNMP Timeout setting to a value or either 3,4, or 5. This is the number of seconds

that AirWave will wait for a response from a device after sending an SNMP request, so a smaller

number is more ideal.

3. Change the SNMP Retries value to 10. This value represents the number of times AirWave tries

to poll a device when it does not receive a response within the SNMP Timeout Period or the

Group’s Missed SNMP Poll Threshold setting (1-100).

Although the upper limit for SNMP Retries value is 40, some SNMP libraries still have a hard

limit of 20 retries. In these cases, any retry value that is set above 20 will still stop the retry at

20.

10 |AirWave 8.3.0 | Best Practices Guide

Figure 4 Timeout settings in Device Setup > Communication

4. Click Save.

Setting Up Time Synchronization

You can set the clock on a controller manually or by configuring the controller to use a Network Time

Protocol (NTP) server to synchronize its system clock with a central time source.

Manually Setting the Clock on a Controller

You can use either the WebUI or CLI to manually set the time on the controller’s clock.

1. Navigate to the Configuration > Management > Clock page.

2. Under Controller Date/Time, set the date and time for the clock.

3. Under Time Zone, enter the name of the time zone and the offset from Greenwich Mean Time

(GMT).

4. To adjust the clock for daylight savings time, click Enabled under Summer Time. Additional fields

appear that allow you to set the offset from UTC and the start and end recurrences.

5. Click Apply.

Setting Up NTP

On the AMP Setup >Network page, locate the Network Time Protocol (NTP) section. The Network

Time Protocol is used to synchronize the time between AirWave and your network reference NTP

server. NTP servers synchronize with external reference time sources, such as satellites, radios, or

modems.

Specifying NTP servers is optional. NTP servers synchronize the time on the AirWave server, not on

individual access points.

To disable NTP services, clear both the Primary NTP Server and Secondary NTP Server fields. Any

problem related to communication between AirWave and the NTP servers creates an entry in the event

log. For more information on ensuring that AirWave servers have the correct time, please see

http://support.ntp.org/bin/view/Servers/NTPPoolServers.

Setting Default Description

Primary ntp1.yourdomain.com Sets the IP address or DNS name for the primary NTP server.

Secondary ntp2.yourdomain.com Sets the IP address or DNS name for the secondary NTP server.

Table 1: Network Time (NTP) Fields and Default Values

Enabling Support for Channel Utilization And Statistics

AirWave 8.3.0 | Best Practices Guide Configuring AirWave for Global Aruba Infrastructure | 11

To enable support for channel utilization statistics, your AirWave server and ArubaOS and Aruba Instant

devices must be running the following versions of software:

nAirWave 7.6 or later

nArubaOS 6.0.1 or later

nAruba Instant 3.3 or later

Devices running ArubaOS 6.0.1 can report RF utilization metrics, but ArubaOS 6.1 or later is necessary

to also obtain classified interferer information.

AirWave Setup

1. Navigate to AMP Setup > General.

2. In the Additional AMP Services section, set Enable AMON Data Collection to Yes, and set

Prefer AMONvs SNMP Polling to Yes.

3. Click Save.

12 |AirWave 8.3.0 | Best Practices Guide

Figure 5 AMON Data Collection Setting in AMP Setup > General

General AirWave Management

nAvoid running nightly maintenance and scheduled reports in overlapping time intervals.

nAlways set a host name for your AMP.

nIf you manage the devices with IPv6, IPv4 addresses as dual-stack, add the devices with IPv6 address in

AirWave Device setup > Add or Import Devices via CSV file and add the IPv6 address of AirWave as

an mgmt-server on the controller.

AirWave 8.3.0 | Best Practices Guide Configuring AirWave for Global Aruba Infrastructure | 13

Controller Setup (Conductor And Local)

Enabling these commands on ArubaOS versions prior to 6.0.1.0 can result in performance issues on

the controller. If you are running previous firmware versions such as ArubaOS 6.0.0.0, you should

upgrade to ArubaOS 6.0.1 (to obtain RF utilization metrics) or 6.1 (to obtain RF utilization and classified

interferer information) before you enter this command.

Using ArubaOS 6.x

The following commands are for ArubaOS versions 6.3.1 and later 6.x releases. To get the commands

for other versions of ArubaOS 6.x, refer to the Command-Line Interface Reference Guide for that version.

Use SSH to access the controller’s command-line interface, enter enable mode, and issue the following

commands:

(Controller-Name) # configure terminal

Enter Configuration commands, one per line. End with CNTL/Z

(Controller-Name) (config) # mgmt-server type amp primary-server <AMP-IP>

(Controller-Name) (config) # mgmt-server profile <profile-name>

(Controller-Name) (config) # write mem

You can add up to four <AMP-IP> addresses in a Mobility Conductor setup.

You can add up to three <AMP-IP> addresses in a managed devices setup.

Using ArubaOS 8.x

The following commands are for ArubaOS versions 8.4 and earlier 8.x releases. To get the commands

for other versions of ArubaOS 8.x, refer to the Command-Line Interface Reference Guide for that version.

Use SSH to access Mobility Conductor’s command-line interface, enter enable mode, and issue the

following commands:

(host) [mynode] # configure terminal

Enter Configuration commands, one per line. End with CNTL/Z

(host) [mynode] (config) #mgmt-server primary-server <AMP-IP>

(host) [mynode] (config) #profile default-amp

(host) [mynode] (config) #write memory

You can add up to four <AMP-IP> addresses in a Mobility Conductor setup.

You can add up to three <AMP-IP> addresses in a managed devices setup.

Reducing AMON Messages from controller

nTo reduce AMON messages from the controller, disable the unnecessary management profiles on the

Aruba controller.

nTo reduce AMON_STATION_RSSI_INFO_V2_MESSAGE incoming from the controller, reduce the RSSI

interval to 60/120 seconds from the default 5 seconds on the controller.

Chapter 3

Configuring anAruba Group

Configuring an Aruba Group

It is prudent to establish one or more Aruba Groups within AirWave. During the discovery process you

will move new discovered controllers into this group.

This section contains the following topics:

nBasic Monitoring Configuration

nAdvanced Configuration

Basic Monitoring Configuration

1. Navigate to Groups > List.

2. Click Add.

3. Enter a Name that represents the Aruba device infrastructure from a security, geographical, or

departmental perspective and Click Add.

4. You will be redirected to the Groups > Basic page for the Group you just created. On this page

you will need to verify and/or change the following Aruba-specific settings.

a. Find the SNMP Polling Periods section of the page, as illustrated in Figure 6.

b. Verify that the Override Polling Period for Other Services option is set to Yes.

c. Verify that Client Data Polling Period is set to 10 minutes. Do not configure this interval lower than

5 minutes.

Enabling the SNMP Rate Limiting for Monitored Devices option in the previous chapter adds a

small delay between each SNMP Get request, thus the actual polling interval is 12 minutes for 10

minute polling interval.

d. Verify that the Device-to-Device Link Polling Period option is set to 30 minutes.

e. Verify that the Rogue AP and Device Location Data Polling Period option is set to 30 minutes.

AirWave 8.3.0 | Best Practices Guide 15

16 |AirWave 8.3.0 | Best Practices Guide

Figure 6 SNMP Polling Periods section of Groups > Basic

5. Locate the Aruba section of this page. See Figure 7.

6. Configure the proper SNMP Version for monitoring the Aruba infrastructure.

Figure 7 Group SNMP Version for Monitoring

7. Click Save and Apply.

Advanced Configuration

Refer to the AirWave 8.2.x Controller Configuration Guide located at Home > Documentation for detailed

instructions.

Chapter 4

Discovering Aruba Infrastructure

AirWave utilizes the Aruba topology to efficiently discover downstream infrastructure. This section

guides you through the process of discovering and managing your Aruba device infrastructure.

Refer to the following earlier sections in this document before attempting discovery:

nConfiguring AirWave for Global Aruba Infrastructure

nConfiguring anAruba Group

The following topics in this chapter walk through the basic procedure for discovering and managing

Aruba infrastructure:

nDiscovering or Adding Conductor Controllers

nLocal Controller/Managed Devices Discovery

nThin AP Discovery

Always add one controller and its affiliated Thin APs into management or monitoring mode in a serial

fashion, one at a time. Adding new devices is a very CPU intensive process for AirWave and can quickly

overwhelm all of the processing power of the server if hundreds of Thin APs are added (migrated from

New to Managed or Monitoring) simultaneously.

Discovering or Adding Conductor Controllers

Scan networks containing Aruba conductor controllers from the Device Setup > Discover page, or

manually enter the conductor controller by following these steps in the Device Setup > Add page:

1. Select the Aruba Device type and click Add. The page illustrated on Figure 8 appears.

2. Enter the Name and the IP Address for the controller.

3. Enter SNMP Community String, which is required field for device discovery.

Be sure to note the community string because it must match the SNMP trap community string.

Refer to Define AirWave as a Trap Host Using the ArubaOS CLI.

AirWave 8.3.0 | Best Practices Guide 17

18 |AirWave 8.3.0 | Best Practices Guide

Figure 8 Aruba Credentials in Device Setup > Add

4. Enter the required fields for configuration and basic monitoring:

nTelnet/SSH user name

nTelnet/SSH password

nEnable password

nIf you are using SNMPv3, and the controller's date/time is incorrect, the SNMP agent will not

respond to SNMP requests from the AirWave SNMP manager. This will result in the

controller and all of its downstream access points showing as Down in AirWave.

5. Assign the controller to a Group and Folder.

6. Ensure that the Monitor Only option is selected.

If you select Manage read/write, AirWave will push the group setting configuration, and

existing device configurations will be deleted/overwritten.

7. Click Add.

8. Navigate to the Devices > New page.

9. Select the Aruba conductor controller you just added from the list of new devices.

10. Ensure Monitor Only option is selected.

11. Click Add.

AirWave 8.3.0 | Best Practices Guide Discovering Aruba Infrastructure | 19

Local Controller/Managed Devices Discovery

In ArubaOS 6.x, the controllers can be deployed as Conductor or Local. In a Conductor-Local

deployment, Conductor holds the responsibility of all policy configurations. This include services such as

WIPS, Initial AP configurations, user roles, and authentication-related configurations, etc. The local

controller/managed devices terminates AP tunnels, processes and forwards user traffic (including

authentication), manages ARM (Adaptive Radio Management), mobility features, and QoS.

In ArubaOS 8.x, Aruba also offers a Mobility Conductor Appliance which provides additional features

which are not available in the other controller models. In ArubaOS 8.x deployment, we can have MM-MD

deployment where there is a Mobility Conductor and managed devices (MD) forming a cluster. It

provides controller clustering capability that allows better user experience via features like Hitless

failover, Automatic user load balancing, Automatic AP load balancing, and seamless roaming across the

cluster. This type of deployment could perhaps be considered for sensitive environments where high

wireless performance and reliability are a requirement for critical services.

ArubaOS 8.X is necessary with Mobility Conductor Appliance. APs cannot terminate on any Conductor

or Mobility Conductor controllers, APs can only terminate on controllers deployed in local mode.

ArubaOS 6.X allows AP termination on either Conductor or local controllers/managed devices.

Local controllers/managed devices are added to AirWave via the Conductor controller by a discovery

scan, or manually added in Device Setup > Add. After waiting for the Thin AP Polling Period interval or

executing a Poll Controller Now command from the Devices > Monitor page, the local

controllers/managed devices will appear on the Devices > New page.

Add the local controller/managed device to the Group defined previously. Within AirWave, local

controllers/managed devices can be split away from the Conductor controller's Group.

Local Controller/managed device Discovery/monitoring may not work as expected if AirWave is unable

to communicate directly with the target device. Be sure and update any ACL/Firewall rules to allow

AirWave to communicate with your network equipment.

Thin AP Discovery

Thin APs are discovered via the local controller/managed device. After waiting for the Thin AP Polling

Period or executing a Poll Controller Now command from the Devices > Monitor page, thin APs will

appear on the Devices > New page.

Add the thin APs to the Group defined previously. Within AirWave, thin APs can be split away from the

controller's Group. You can split thin APs into multiple Groups if required.

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