Technical data

Redundant Ethernet

For any redundancy option to work without issues, make sure that the VLANs are the

same across all the ports on the external manageable switch.

With N+1, the backup controller must be in the same subnet as the primary control-

lers. With DHCP Option 43, you can specify a primary and backup controllers for the

APs and with this configuration, the backup controller can be in a different subnet

from the primary controller.

This chapter contains the following sections:

 Configure Redundant Ethernet Failover With the CLI

 N+1 Redundancy

 Option 43

Redundant Ethernet

When operating an MC1500 or MC3000, Ethernet redundancy can be enabled at any

time by simply following the steps outlined in the following sections. However, some

controller models require dual port bonding to be enabled before Ethernet redun-

dancy can be activated. These controllers include the following models:

 MC3200

 MC4100

 MC4200

 MC5000 (with accelerator card)

To enable dual bonding on these models, access the controller’s CLI and enter the

following commands:

default# configure terminal

default(config)# bonding dual

default(config)# exit

default(config)# copy running-config startup-config

The system requires a reboot for the change to become effective. Reboot the system

now and then proceed with the following sections to enable redundancy.

Note:

MC6000 deployments require that bonding be set to none for Dual Ethernet

redundant and Active configuration functionality.