Figure 144: Redundant Topology: Master-Local Redundancy

The network in Figure 144, the master controller is connected to the local Dell controllers on VLANs 1 through n through a Layer-2 network. To configure redundancy as described in the conceptual overview for master-local redundancy, configure VRRP instances on each of the VLANs between the master and the respective local controller. The VRRP instance on the local controller is configured with a higher priority to ensure that when available, the APs always choose the local controller to terminate their tunnels.

Configure the interface on the master controller to be a trunk port with 1, 2… n being member VLANs.

Collect the following data before configuring master controller redundancy.

VLAN IDs on the Dell controllers corresponding to the VLANs 1, 2…n shown in the topology above. Virtual IP addresses that has been reserved to be used for the VRRP instances.

You can use either the WebUI or CLI to configure VRRP on the master Dell controllers (see Table 140). For this topology, the following are recommended values:

For priority: Set the local to 110; set the master to 100 (the default value) Enable preemption

NOTE: The master controller is configured for a number of VRRP instances (equal to the number of local Dell controllers the master

is backing up).

The following example configuration of the master controller in such a topology for one of the VLANs (in this case VLAN 22).

(host)(config) #vrrp 22 vlan 22

ip address 10.200.22.254 priority 100

preempt

authentication password

description Master-acting-as-backup-to-local tracking master-up-time 30 add 20

no shutdown

The following example configuration on the corresponding local controller.

(host)(config) #vrrp 22 vlan 22

ip address 10.200.22.254 priority 110

preempt

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Dell 6.2 manual Redundant Topology Master-Local Redundancy

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