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Frequent Contributor I

AP93H on 6.5.4.0 heartbeat problems

Doing a bit of troubleshooting to try and resolve issues with APs going down... and I've found a large number of our AP93H units are flipping between controllers. 

 

We don't use any HA, each AP system profile has a backup controller and we rely on the AP to fail over if it loses heartbeat.

 

The AP93H is doing this a lot. In each case it's just one AP that fails over out of multiple APs on the same Vlan/subnet and switch. The AP is not rebooting, they have the expected uptime. This issue appears to only be affected the AP93H.

 

Anyone else seen this?

 

Frequent Contributor I

Re: AP93H on 6.5.4.0 heartbeat problems

I should add this isn't a problem that's new to 6.5.4.0 I found someone talking about this same issue back in 2015... and it was me.

Super Contributor II

Re: AP93H on 6.5.4.0 heartbeat problems

Hi!

 

What is the failover reason listed when issuing show ap debug system-status on an AP that recently had the issue?

 

Are they provisioned as RAPs or CAPs?

 

Cheers,

Christoffer Jacobsson | Aranya AB
Aruba Partner Ambassador
Aruba: ACMX #537 ACCP | CWNP: CWNA CWDP CWSP CWAP
Frequent Contributor I

Re: AP93H on 6.5.4.0 heartbeat problems

Hey... They're configured as CAPs. 

 

Here's the latest failover notice from the rebootstrap information:

2017-11-26 23:07:21 Switching to LMS 144.32.64.34: Missed heartbeats: Last Sequence Generated=63251 Sent=63251 Rcvd=63240; eth Sent=5764883 Drop=0; gre Sent=5764883 Drop=0 First=1; ipsec Sent=0 Drop=0. Last Ctrl message: KEEPALIVE len=45 dest=144.32.64.36 tries=1 seq=150

2017-11-26 23:13:32 Switching to primary LMS 144.32.64.36

 

The switch has another 15 APs connected, none of which experienced a problem at this time, but have rebootstrapped at other points.

 

I certainly haven't ruled out there being a network issue, but we don't see multiple APs rebootstrap at the same time (which is a sure sign of a network problem) and whilst we see a lot of AP93H do this, I don't believe I'm seeing it with any other model... Possibly the 130 series, but I don't have enough data points for those.

Super Contributor II

Re: AP93H on 6.5.4.0 heartbeat problems

Perhaps you could try to slightly increase the "Bootstrap threshold" in the AP system profile?

 

Cheers,

Christoffer Jacobsson | Aranya AB
Aruba Partner Ambassador
Aruba: ACMX #537 ACCP | CWNP: CWNA CWDP CWSP CWAP
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