Wireless Controller
Dedicated Wi-Fi control and management for high density and mobility
gkaur
Staff
Staff
Article Id 197979
Description

How do I setup N plus 1 (N+1) Configuration?


Scope

KB ARTICLE TYPE: Configuration

RELATED PRODUCTS: All controller/AP platforms

RELATED SOFTWARE VERSIONS: 3.4.2-140 or later

KEYWORDS : N+1, redundancy, cluster
Solution
The optional N+1 redundancy software feature replaces and extends the standard Meru Wireless LAN System High Availability redundancy service by allowing a standby N+1 slave controller to monitor and failover more than one master controller.

The detailed configuration steps are as below,

Configuration Steps:

STEP 1: Starting N+1 on Master Controllers: N+1 must first be started on the Master Controllers.

To configure a master controller:

1. On each master controller, enter configuration mode and start the N+1 software:
3000-1# configure terminal 
3000-1(config)# nplus1 start master

2. Exit configuration mode and check that the N+1 software has been started on that controller:
3000-1(config)# exit
3000-1# sh nplus1 
-----------------------------------------------------
Master controller
nplus1 Software Version : 1.0-40
Master IP : 10.1.1.10
Master Hostname : 3000-1
-----------------------------------------------------

STEP 2: Configuring N+1 on the Slave Controller

After starting N+1 on each of the Master Controllers, start N+1 on the Slave Controller, and then add each Master Controller to the Slave Controller.

To configure N+1 on the slave controller, follow these steps:

1. Enter configuration mode and start the N+1 software:
3000-slave# configure terminal
3000-slave(config)# nplus1 start slave
Setting up this controller as a Passive Slave controller
3000-slave(config)#

2. Check that the software has started on the slave with the show nplus1 command 
(note that no masters display in the Master Controllers list):
3000-slave (config)# do show nplus1 
-----------------------------------------------------------------
Current State: Passive 
Wait to restore: 8 minutes
Nplus1 Software Version: 1.0-40
Slave IP: 10.1.1.21
Slave Hostname: 3000-slave
-----------------------------------------------------------------
Master Controllers 
Hostname IP Address Admin Switch Reason Adverts SW Version
-----------------------------------------------------------------
3000-slave# 

3. Supply the hostname (for example, 3000-1) and IP address of each master 
controller in the cluster. You will be prompted for the controller’s password to complete the addition:
3000-slave# configure terminal
3000-slave(config)# nplus1 add 3000-1 10.1.1.10
admin@10.1.1.10 Password: xxx

4. Exit configuration mode and check that the master controller has been enabled 
(the Admin status is now Enable):
3000-slave(config)# exit
3000-slave# show nplus1 
-----------------------------------------------------------------
Current State : Passive
Wait to Restore : 8 minutes
nplus1 Software Version : 1.0-40
Slave IP : 10.1.1.21
Slave Hostname : 3000-slave
-----------------------------------------------------------------
Master Controllers 
Hostname IP Address Admin Switch Reason Adverts SW Version
--------------------------------------------------------------------
3000-1 10.1.1.10 Enable Yes - 1 3.4.2-140

LIMITATIONS IF ANYThe Slave Controller must be the last controller in the cluster to start N+1.  Licensing required if there is more than one Master. 


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