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Frequent Contributor II

AP booting process with Master and Local controller

Hi All,

I have configured DHCP option 43 to discover Master controller & from there I have provisioned the AP to a different AP group where the LMS ips are configured. Now all the APs came up to the local.

So far its fine.

But I got few question, If for some reason my master controller goes down and AP associated to the local controller also reboot at the same time, will the AP try to contact the master ?

rana
Guru Elite

Re: AP booting process with Master and Local controller

Okay,  

 

Based on your description, when the AP boots, it does this:

 

Boot> Option 43> Master> Local (because of LMS-IP).  If the master goes down and the AP reboots, option 43 will try to find the master and find nothing, so the AP will not come up if the master is down and the AP reboots.



Colin Joseph
Aruba Customer Engineering

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

Frequent Contributor II

Re: AP booting process with Master and Local controller

So you meant to say every time an AP reboots it will look for the master regardless its provisioned to LMS or not ?

and if master is not reachable it won't come up to the LMS ?

 

 

rana
Guru Elite

Re: AP booting process with Master and Local controller

Correct.  The LMS is not saved when the AP reboots.  When the AP reboots, it finds its controller using the DHCP Option.



Colin Joseph
Aruba Customer Engineering

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

Frequent Contributor II

Re: AP booting process with Master and Local controller

Thanks Colin for the clarification,

Is there any option to tell the AP to contact LMS and not the Master every time it reboots ?

rana

Re: AP booting process with Master and Local controller

You can point your Option 43 to the IP of the local(s) instead, or you can chose to use DNS and round-robin the master and local IP addresses. If one is down eventually the AP will round robin to the other.

Jerrod Howard
Sr. Techical Marketing Engineer
Frequent Contributor II

Re: AP booting process with Master and Local controller

Thanks,

It seems that DNS is the better option.

rana
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