Aruba Networks AirOS v2.3, User Manual

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28 Aruba AirOS Part 0500036-02
v2.3 User Guide January 2005
Master-local Switch Redundancy
This section outlines the concepts behind a redundancy solution where a master can act as a
backup for one or more local switches and shows how to configure the Aruba WLAN Switches
for such a redundant solution. In this solution, the local switches act as the controller for the
APs. When any one of the local switches becomes unavailable, the master takes over the APs
controlled by that local switch for the time that the local switch remains unavailable. It is
configured such that when the local switch comes back again, it can take control over the APs
once more.
This type of redundant solution is illustrated by the following topology diagram.
N
OTE
—
T his solution requires that the master switch has a layer-2 connectivity to all the
local switches.
In the network shown above, the master switch is layer 2 connected to the local switches on
VLANs 1, 2… n respectively. 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 switch. The VRRP instance on the local switch is
configured with a higher priority to ensure that when available, the APs always choose the local
switch to terminate their tunnels.
To configure the master and local switches for such a topology:
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