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Contributor II

Configure 7210 with failover

Getting ready to configure two 7210's.  Need to understand the failover setup on these.  I will be most likely running 6.4.4.8 code. 

 

My understanding is that with Aruba there is a concept of:

 

 Standalone: This is the only controller on the network.
 Master: This controller will manage other controllers on the network.
 Local: This controller will be managed by a master controller.
 Branch: This controller will be a branch controller on

 

So if I want to configure redundancy I can do two Masters and create a cluster or I can do Master and  Backup Master.  However the user guide does not really tell me how to configure the WLC redundancy.  Is there any documentation or video/guide lines available?

 

In Active/Standby configuration if failover happens do the AP's and clients lose connectivity or does the standby controller maintains the session table?

 

I did find this link but again doesn't really explain how to setup redundancy.

http://www.arubanetworks.com/techdocs/ArubaOS_6.4.4.x_WebHelp/Web_Help_Index.htm#ArubaFrameStyles/VRRP/HighAvOverView.htm%3FTocPath%3DVirtual%2520Router%2520Redundancy%2520Protocol%2520(VRRP)%7C_____1

 

Thank you.

Re: Configure 7210 with failover

Start by reading here:

 

https://community.arubanetworks.com/aruba/attachments/aruba/unified-wired-wireless-access/13066/1/Redundancy_Design_Guide.pdf

 

The above PDF will assist you to understand what you need to config.

 

 

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Contributor II

Re: Configure 7210 with failover

Thank you for the design guide so after reading that I'm thinking two possible scenarios.

 

1) I can make one controller Master and second one Local

2) I can have both setup as Master and Master Backup

 

If I go with option 2 will I need to get licenses for both controllers or just one and they will be shared between the two?

Option 1 I am guessing requires separate licenses on both

Also is the failover seamless or clients/AP's lose connectivity?

 

Re: Configure 7210 with failover

Contributor II

Re: Configure 7210 with failover

So basically there is no seamless way to move AP's and clients over even with the fast fail over it will be rapid but AP's will deauth clients, move to the standby and clients will need to re auth.

 

What about VRRP if I am using that AP's will still need to reboot?

 

Any reason I would want to use Loopback IP's as peer IP's vs just the interface IP?

Guru Elite

Re: Configure 7210 with failover


mali77 wrote:

So basically there is no seamless way to move AP's and clients over even with the fast fail over it will be rapid but AP's will deauth clients, move to the standby and clients will need to re auth.

 

What about VRRP if I am using that AP's will still need to reboot?

 

Any reason I would want to use Loopback IP's as peer IP's vs just the interface IP?


We have seen APs move over in less than 5 seconds.  Clients fail over as fast as they can recover from a deauth, so it is client-specific.  Having a VRRP does not improve failover times, and APs do not reboot in any failover scenarios.  What failover times are necessary for you?



Colin Joseph
Aruba Customer Engineering

Looking for an Answer? Search the Community Knowledge Base Here: Community Knowledge Base

Contributor II

Re: Configure 7210 with failover

I was hoping to do it without any AP/Client disconnects and a seamless process for the clients as well as the AP's. 

 

Is there any new code coming up that will support this feature?

Also with VRRP I have seen a setup using Loopback IP's as peer IP's is that a best practice?

Guru Elite

Re: Configure 7210 with failover

When you say "hoping" what is your experience with other wifi failover systems before this?



Colin Joseph
Aruba Customer Engineering

Looking for an Answer? Search the Community Knowledge Base Here: Community Knowledge Base

Contributor II

Re: Configure 7210 with failover

I was thinking somethin along the lines of Cisco SSO.  Where already authenticated clients do not have to re associate and backup WLC has a copy of their state.

 

 

Guru Elite

Re: Configure 7210 with failover

The HA Fast failover mechanism does have Client State Synchronization:  Details are here:  http://www.arubanetworks.com/techdocs/ArubaOS_6.4.4.x_WebHelp/Web_Help_Index.htm#ArubaFrameStyles/VRRP/HighAvFastFailover.htm?Highlight=state sync

 

How to configure fast failover is here:  http://community.arubanetworks.com/t5/Controller-Based-WLANs/How-does-high-availability-fast-failover-feature-work-and-how-to/ta-p/177468

 



Colin Joseph
Aruba Customer Engineering

Looking for an Answer? Search the Community Knowledge Base Here: Community Knowledge Base

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