Concept Guide
Table Of Contents
- About this Guide
- About Instant
- Setting up a W-IAP
- Automatic Retrieval of Configuration
- Instant User Interface
- Initial Configuration Tasks
- Customizing W-IAP Settings
- Modifying the W-IAP Host Name
- Configuring Zone Settings on a W-IAP
- Specifying a Method for Obtaining IP Address
- Configuring External Antenna
- Configuring Radio Profiles for a W-IAP
- Configuring Uplink VLAN for a W-IAP
- Changing the W-IAP Installation Mode
- Changing USB Port Status
- Master Election and Virtual Controller
- Adding a W-IAP to the Network
- Removing a W-IAP from the Network
- VLAN Configuration
- IPv6 Support
- Wireless Network Profiles
- Configuring Wireless Network Profiles
- Configuring Fast Roaming for Wireless Clients
- Configuring Modulation Rates on a WLAN SSID
- Multi-User-MIMO
- Management Frame Protection
- Disabling Short Preamble for Wireless Client
- Editing Status of a WLAN SSID Profile
- Editing a WLAN SSID Profile
- Deleting a WLAN SSID Profile
- Wired Profiles
- Captive Portal for Guest Access
- Understanding Captive Portal
- Configuring a WLAN SSID for Guest Access
- Configuring Wired Profile for Guest Access
- Configuring Internal Captive Portal for Guest Network
- Configuring External Captive Portal for a Guest Network
- Configuring Facebook Login
- Configuring Guest Logon Role and Access Rules for Guest Users
- Configuring Captive Portal Roles for an SSID
- Configuring Walled Garden Access
- Authentication and User Management
- Managing W-IAP Users
- Supported Authentication Methods
- Supported EAP Authentication Frameworks
- Configuring Authentication Servers
- Understanding Encryption Types
- Configuring Authentication Survivability
- Configuring 802.1X Authentication for a Network Profile
- Enabling 802.1X Supplicant Support
- Configuring MAC Authentication for a Network Profile
- Configuring MAC Authentication with 802.1X Authentication
- Configuring MAC Authentication with Captive Portal Authentication
- Configuring WISPr Authentication
- Blacklisting Clients
- Uploading Certificates
- Roles and Policies
- DHCP Configuration
- Configuring Time-Based Services
- Dynamic DNS Registration
- VPN Configuration
- IAP-VPN Deployment
- Adaptive Radio Management
- Deep Packet Inspection and Application Visibility
- Voice and Video
- Services
- Configuring AirGroup
- Configuring a W-IAP for RTLS Support
- Configuring a W-IAP for Analytics and Location Engine Support
- Managing BLE Beacons
- Clarity Live
- Configuring OpenDNS Credentials
- Integrating a W-IAP with Palo Alto Networks Firewall
- Integrating a W-IAP with an XML API Interface
- CALEA Integration and Lawful Intercept Compliance
- Cluster Security
- W-IAP Management and Monitoring
- Uplink Configuration
- Intrusion Detection
- Mesh W-IAP Configuration
- Mobility and Client Management
- Spectrum Monitor
- W-IAP Maintenance
- Monitoring Devices and Logs
- Hotspot Profiles
- ClearPass Guest Setup
- IAP-VPN Deployment Scenarios
- Acronyms and Abbreviations
70 | Customizing W-IAP Settings Dell Networking W-Series Instant 6.5.1.0-4.3.1.0 | User Guide
Master Election and Virtual Controller
Instant does not require an external Mobility Controller to regulate and manage the Wi-Fi network. Instead,
one W-IAP in every network assumes the role of VC. It coordinates, stores, and distributes the settings required
for providing a centralized functionality to regulate and manage the Wi-Fi network. The VC is the single point of
configuration and firmware management. When configured, the VC sets up and manages the Virtual Private
Network (VPN) tunnel to a mobility controller in the data center.
The VC also functions like any other W-IAP with full RF scalability. It also acts as a node, coordinating DHCP
address allocation for network address translated clients ensuring mobility of the clients when they roam
between different W-IAPs.
Master Election Protocol
The Master Election Protocol enables the Instant network to dynamically elect a W-IAP to take on a VC role and
allow graceful failover to a new VC when the existing VC is not available. This protocol ensures stability of the
network during initial startup or when the VC goes down by allowing only one W-IAP to self-elect as a VC.
Preference to a W-IAP with 3G/4G Card
The Master Election Protocol prefers the W-IAP with a 3G/4G card when electing a VC for the Instant network
during the initial setup.
The VC is selected based on the following criteria:
l If there is more than one W-IAP with 3G/4G cards, one of these W-IAPs is dynamically elected as the VC.
l When a W-IAP without 3G/4G card is elected as the VC but is up for less than 5 minutes, another W-IAP with
3G/4G card in the network is elected as the VC to replace it and the previous VC reboots.
l When a W-IAP without 3G/4G card is already elected as the VC and is up for more than 5 minutes, the VC
will not be replaced until it goes down.
W-IAP135 is preferred over W-IAP105 when a VC is elected.
Preference to a W-IAP with Non-Default IP
The Master Election Protocol prefers a W-IAP with non-default IP when electing a VC for the Instant network
during initial startup. If there are more than one W-IAPs with non-default IPs in the network, all W-IAPs with
default IP will automatically reboot and the DHCP process is used to assign new IP addresses.
Viewing Master Election Details
To verify the status of a W-IAP and master election details, execute the following commands:
(Instant AP)# show election statistics
(Instant AP)# show summary support
Manual Provisioning of Master W-IAP
In most cases, the master election process automatically determines the best W-IAP that can perform the role
of VC, which will apply its image and configuration to all other W-IAPs in the same W-IAP management VLAN.
When the VC goes down, a new VC is elected.
Provisioning a W-IAP as a Master W-IAP
You can provision a W-IAP as a master W-IAP by using the Instant UI or the CLI.