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Super Contributor II
Posts: 354
Registered: ‎09-26-2012

Extended Standby Controller Capacity

Reference to 6.4 Release note any one can please provide more detail about "Extended Standby Controller Capacity".  Thank you

 

Thanks & Regards
Syed Murad Ali
ACMP ACMA CCNA
MVP
Posts: 1,408
Registered: ‎05-28-2008

Re: Extended Standby Controller Capacity

Hi,

 

In Version 6.4 , as far as i aware , if u working with Master-MasterStandby,u can take advantage of the standby controller to handle extra standby AP units.

 

Example:

Controller A - Master - 128 Licenese - With 140 AP UNITS deployed ..so it's got 12 more then what it can operate.

Contoller B - Standby Master - Got 128 (OR 140) Lienese - he will operate the 12 "Extra" AP units.

 

B.PNG

 

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Super Contributor II
Posts: 354
Registered: ‎09-26-2012

Re: Extended Standby Controller Capacity

I am sorry i am not a native english speaker that is why i am not able to get you properly. Let me rephrase my question.

 

Suppose we have 02 controller say MC1 & MC2. Now MC1 has license of 128 APs and working as active while MC2 has no license (OS 6.3) and working as standby. now in this situation how many AP's does MC1 will support and once MC1 fails how many AP will MC2 will support ?

Thank you

Thanks & Regards
Syed Murad Ali
ACMP ACMA CCNA
Guru Elite
Posts: 20,966
Registered: ‎03-29-2007

Re: Extended Standby Controller Capacity

Syedmurali,

 

That note only applies to the "fast-failover" feature that was introduced in 6.3 and is in 6.4.  It is not mandatory, and you can continue to use VRRP and LMS-IP based failover.  The fast-failover mechanism builds a tunnel to the primary controller and a backup controller.  The enhancement allows more devices to form a tunnel using the fast-failover feature to a controller than would be allowed typically.  This is to support N+1 redundancy.

 

For example, if a single controller is backing up 3 controllers, the access points on the three controllers will have a primary tunnel to those three controllers and a backup tunnel to the single controller (the +1).  Those backup tunnels on the single controller can now temporarily exceed the number of access points that would be allowed on that controller to provide redundancy for the three controllers.



Colin Joseph
Aruba Customer Engineering

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Super Contributor II
Posts: 354
Registered: ‎09-26-2012

Re: Extended Standby Controller Capacity

Thanks CJ. It was nice explanation.
Thanks & Regards
Syed Murad Ali
ACMP ACMA CCNA
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