Wireless Access

Reply
Occasional Contributor II

Controller HA config comparison

Hi, we have 2 controllers. What is the pros & cons if configuring two controllers as Master/Slave or Master/local? Thanks in advance. 

Re: Controller HA config comparison

There is quite a few reasons in terms of pros and cons when configuring controller redundancy with 2 controllers. 

 

Master/Master Backup = Uses VRRP and will only work in a L2 domain.

Master/Local = Will work in a L2/L3 domain but AP's will rebootstrap to establish tunnels.
HA Group = Works over L3, GRE tunnels already established so fastest fail over.

 

failover_comparison.PNG

Take a look at the Campus WLAN Redundancy VRD (2017) for further information.

 


ACMA, ACMP, ACSA, ACDX #985
If my post addresses your query, give kudos:)
Occasional Contributor II

Re: Controller HA config comparison

Thanks for your kind reply. If considering ap load sharing, should we choose master/local?

Re: Controller HA config comparison

If your environment is L3 separated you can use Master/Local with a HA
group as well.

ACMA, ACMP, ACSA, ACDX #985
If my post addresses your query, give kudos:)
Occasional Contributor II

Re: Controller HA config comparison

Then need 2 pair controllers?  Master and local controllers both can support same set of AP , right? 

MVP

Re: Controller HA config comparison

Yes, you can perfectly set HA up with a master+local setup.

This doesn't limit your HA setup either, you can do any combination of active, standby and or dual.

Koen (ACMX #351 | ACDX #547 | ACCP)

-- Found something helpful, important, or cool? Click the Kudos Star in a post.
-- Problem Solved? Click "Accept as Solution" in a post.

Re: Controller HA config comparison

You will need 2 controllers regardless of any redudacy model. Correct, the AP will need to support the firmware that the Local is running. The Local controllers will need to be part of the same deployment. Just a note a Standby Master controller cannot terminate AP's, only AP GRE tunnels when HA is enabled.


ACMA, ACMP, ACSA, ACDX #985
If my post addresses your query, give kudos:)
Occasional Contributor II

Re: Controller HA config comparison

Thank both you. Have a good day.

Search Airheads
cancel
Showing results for 
Search instead for 
Did you mean: