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89 | Customizing IAP Settings Aruba Instant 6.4.0.2-4.1 | User Guide
2. Click the edit link. The edit window for modifying IAP details is displayed.
3. Click the Uplink tab.
4. Specify the VLAN in the Uplink Management VLAN field.
5. Click OK.
6. Reboot the IAP.
In the CLI
To configure uplink VLAN:
(Instant AP)# uplink-vlan <VLAN-ID>
To view the uplink VLAN status:
(Instant AP)# show uplink-vlan
Uplink Vlan Current :0
Uplink Vlan Provisioned :1
Master Election and Virtual Controller
Instant does not require an external mobility controller to regulate and manage the Wi-Fi network. Instead, one IAP in
every network assumes the role of Virtual Controller. It coordinates, stores, and distributes the settings required to
provide a centralized functionality to regulate and manage the Wi-Fi network. The Virtual Controller is the single point
of configuration and firmware management. When configured, the Virtual Controller sets up and manages the VPN
tunnel to a Mobility Controller in the data center.
The Virtual Controller also functions like any other AP 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 IAPs.
Master Election Protocol
The Master Election Protocol enables the Instant network to dynamically elect an IAP to take on a Virtual Controller
role and allow graceful failover to a new Virtual Controller when the existing Virtual Controller is not available. This
protocol ensures stability of the network during initial startup or when the Virtual Controller goes down by allowing
only one IAP to self-elect as a Virtual Controller.
Preference to an IAP with 3G/4G Card
The Master Election Protocol prefers the IAP with a 3G/4G card, when electing a Virtual Controller for the Instant
network during the initial setup. The Virtual Controller is selected based on the following criteria:
l If there is more than one IAP with 3G/4G cards, one of these IAPs is dynamically elected as the Virtual
Controller.
l When an IAP without 3G/4G card is elected as the Virtual Controller but is up for less than 5 minutes, another IAP
with 3G/4G card in the network is elected as the Virtual Controller to replace it and the previous Virtual Controller
reboots.
l When an IAP without 3G/4G card is already elected as the Virtual Controller and is up for more than 5 minutes,
the Virtual Controller will not be replaced until it goes down.
IAP-135 is preferred over IAP-105 when a Virtual Controller is elected.