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Occasional Contributor II
Posts: 15
Registered: ‎06-12-2015

Master - Master Redundancy

Can the controller support Master - Master Redundancy across the Layer3 routing?

1) Active Master - Active Master

2) Active Master - Backup Master

and is this support the centralized license?

 

Example

Master#1 - IP 172.16.10.1 ------------------WAN---------------- Master#2 IP 192.168.20.1

Guru Elite
Posts: 8,759
Registered: ‎09-08-2010

Re: Master - Master Redundancy

Backup master has to be in the same segment.

You could do master-local though. These can be in different network segments.

Tim Cappalli | Aruba Security TME
@timcappalli | timcappalli.me | ACMX #367 / ACCX #480
Occasional Contributor II
Posts: 15
Registered: ‎06-12-2015

Re: Master - Master Redundancy

Do you mean AP fast failover?

If Yes, What do I have to do about the vlan on both active controller and backup controller?

Can it be on the different subnet for the user-vlan id?

 

for example

active controller

  • SSID-XXX, Tunnel mode, VLAN10

backup controller

  • SSID-XXX, Tunnel mode, VLAN20
Guru Elite
Posts: 8,759
Registered: ‎09-08-2010

Re: Master - Master Redundancy

Correct. You would use VLAN names and tie the VLAN ID to the name on each controller

Tim Cappalli | Aruba Security TME
@timcappalli | timcappalli.me | ACMX #367 / ACCX #480
Occasional Contributor II
Posts: 15
Registered: ‎06-12-2015

Re: Master - Master Redundancy

Thanks, I get it.

and what is the result in the case I have 2 standby controllers (Many active controller)

Please advise me.

Guru Elite
Posts: 8,759
Registered: ‎09-08-2010

Re: Master - Master Redundancy

Active and Standby are used for N+1 deployments. In most scenarios, you can put both controllers as DUAL, meaning they can be both a primary and a backup.


Tim Cappalli | Aruba Security TME
@timcappalli | timcappalli.me | ACMX #367 / ACCX #480
Occasional Contributor II
Posts: 15
Registered: ‎06-12-2015

Re: Master - Master Redundancy

Active Controller#1 (18AP attached), Dual

Active Controller#2 (20AP attached), Dual

Active Controller#3 (13AP attached), Dual

Active Controller#4 (0AP attached), Dual (64 Support AP)

Active Controller#5 (0AP attached), Dual (64 Support AP)

 

1)What the result if #1 ,#2 and #3 controllers are fail ?

2)Should I make #5 as the standby controller?

 

Thanks again for your help.

Guru Elite
Posts: 8,759
Registered: ‎09-08-2010

Re: Master - Master Redundancy

If multiple controllers fail, you can leverage backup LMS failover.

 

Please work with your Aruba or partner SE. There are other considerations in a multi-controller environment. We don't know anything about your network.


Tim Cappalli | Aruba Security TME
@timcappalli | timcappalli.me | ACMX #367 / ACCX #480
Occasional Contributor II
Posts: 15
Registered: ‎06-12-2015

Re: Master - Master Redundancy

Thanks for your advise, I will contact the Aruba Partner.

 

And I have one question

 

ControllerA - Active (Terminates 30APs)

ControllerB - Active (Terminates 0 AP)

ControllerC - Standby (Terminates 0 AP)

 

If I had HA with N:1 (many active controllers : 1 backup controller) 

Can I configure backup LMS in the AP system profile to ControllerB in the case when the ControllerC failed?

 

Refered from

http://community.arubanetworks.com/t5/tkb/articleprintpage/tkb-id/ControllerBasedWLANs/article-id/2038

"HA takes precedence over LMS"

 

Please explain and correct me. Thanks a lot

Guru Elite
Posts: 8,759
Registered: ‎09-08-2010

Re: Master - Master Redundancy

You'd want to do type Dual for all of them so they can be a primary and backup.


Tim Cappalli | Aruba Security TME
@timcappalli | timcappalli.me | ACMX #367 / ACCX #480
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