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Community Member

how to implement multiple (not redundant) 2100 series controllers?

We are using H-REAP and have the 2125 WAC  at a central location. The APs are given the controller address in DHCP option 43.

The question is this.  When I reach the point that I have more APs than one controller allows I want to add another controller. Do I have to manage which APs connect to each controller or can I give both controller addresses in the option 43 so the APs can figure it out and use whichever controller has room for them at the time?

2 REPLIES
Cisco Employee

Re: how to implement multiple (not redundant) 2100 series contro

Hi,

You could give in both WLC ip addresses in DHCP option 43 and APs should join fine.

Once AP joins, you could actually set high availability and for few APs WLC1 can be made primary and for few APs WLC1 can be made secondary.

Links :-

step 5 : http://www.cisco.com/en/US/tech/tk722/tk809/technologies_configuration_example09186a00808714fe.shtml#p3

High availability : http://www.cisco.com/en/US/tech/tk722/tk809/technologies_configuration_example09186a008064a294.shtml#c4

Regards,

Madhuri

Cisco Employee

Re: how to implement multiple (not redundant) 2100 series contro

The trick is that with one WLC, your option 43 starts with "f104." while when you have 2 WLCs, it is "f108."

From there the APs naturally load balance between controllers or follow your configuration if they are configured with preferred controllers.

Nicolas

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