Wireless Access

Reply
MVP
Posts: 380
Registered: ‎05-09-2013

HA + LMS/Backup LMS Problems

When configuring HA, I typically configure the LMS IP in the AP System Profile and let the Backup LMS be inherited from the HA configuration (DUAL mode). However, I have a customer that has the HA configuration AND LMS/Backup LMS configured. I have heard that this can cause issues with some APs, but don't know the specifics as to what issues. 

 

Could having both of these configured cause APs to reboot or have trouble coming up completely? We have APs that will randomly start rebooting and will show as UP for about 1m30s and then go back down. Random APs at different locations, fix has always been to just replace the AP with another, but would like to identify the root cause, this happens on a regular basis, but customer has over 2000 APs deployed across multiple controller clusters (Master/Local).

 

Running 6.3.1.16 w/ AP's 125, 135 and 225. Happens to all models.


Michael Haring | Senior Network Engineer
Comm Solutions, an Optiv Security Company
www.commsolutions.com | www.optiv.com
MVP
Posts: 4,301
Registered: ‎07-20-2011

Re: HA + LMS/Backup LMS Problems

You use the backup LMS in case you have double failure "The Controller and the AP"
When APs failover to the backup LMS
those APs will not build a standby tunnel until those fail back to the Primary LMS

Get Outlook for iOS
Thank you

Victor Fabian
Lead Mobility Engineer @ Integration Partners
AMFX | ACMX | ACDX | ACCX | CWAP | CWDP | CWNA
MVP
Posts: 380
Registered: ‎05-09-2013

Re: HA + LMS/Backup LMS Problems

[ Edited ]
So if the AP loses communication to its LMS, and HA+backup LMS are configured, could that cause the reboot issue because the AP can't establish a new tunnel? This may be completely unrelated, but wanted to check in on this in case of future problems.

I may not fully grasp the concept of both in use at the same time.

Michael Haring | Senior Network Engineer
Comm Solutions, an Optiv Security Company
www.commsolutions.com | www.optiv.com
MVP
Posts: 380
Registered: ‎05-09-2013

Re: HA + LMS/Backup LMS Problems

Reboot issue turned out to be an issue while installilng the APs. The uplink port was Eth1 and not Eth0, on top of this we have wired AP profiles, so something in this combination was causing the issues. Moved the uplink to Eth0 and all APs came up.

 

Thanks for the information on HA though!


Michael Haring | Senior Network Engineer
Comm Solutions, an Optiv Security Company
www.commsolutions.com | www.optiv.com
Search Airheads
Showing results for 
Search instead for 
Did you mean: