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Author Topic: WiNG 5.8 - 4 Nodes Cluster  (Read 3594 times)

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Offline firmdale

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WiNG 5.8 - 4 Nodes Cluster
« on: September 03, 2015, 10:43:00 AM »
Hello

I am really new to the WiNG system so please forgive me my silly questions.
I wonder if someone could explain me how the cluster of 4 WiNG controllers should be behaving
in case active controller goes down in Active/Standby scenario like below.
Access points in use are AP650 and AP6511 devices.

-----------------------------------------------------------------------------------------------
     HOSTNAME      MEMBER-ID           MAC          MASTER OPERATIONAL-STATE     LAST-SEEN
-----------------------------------------------------------------------------------------------
  fh-rfs6000-4*   0B.1A.xx.xx   5C-0E-8B-1A...       False   standby           00:00:15 ago
  fh-rfs6000-1    0B.1A.xx.xx   5C-0E-8B-1A...         True    active            00:00:15 ago
  fh-rfs6000-3*   0B.1A.xx.xx   5C-0E-8B-1A...       False   standby           self
  fh-rfs6000-2    0B.1A.xx.xx   5C-0E-8B-1A...        False   standby           00:00:15 ago
-----------------------------------------------------------------------------------------------

- Is this normal for all APs to stop broadcasting while they re-adopt to new controller?
- I know that APs can work independently without controller - is it only when all cluster members are unreachable?

Thank you in advance.
firmdale


Offline McNulty

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Re: WiNG 5.8 - 4 Nodes Cluster
« Reply #1 on: September 04, 2015, 01:06:10 AM »
Depends on the architecture.
With 4-digit AP, if WLANs are set to local bridging then you shouldn't see interruption even if all controllers are offline.
With 3-digit AP, there will be an interruption while the AP adopts to the other controller. First the standby controller has tor realize that the primary is gone and come online. Then the AP has to adopt to the new controller. So this can all take several seconds. Solution is to use 4-digit APs :)

And wow you have 4 RFS in a cluster. Who sold you that???

Offline firmdale

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Re: WiNG 5.8 - 4 Nodes Cluster
« Reply #2 on: September 06, 2015, 10:56:39 AM »
McNulty thank you for your reply.

Are you saying that AP650 access points cannot operate on its own i.e. when all controllers will be not accessible?

Also what does the star/asterisk next to some controllers name in CLI mean?

Re 4 nodes cluster setup - I know strange setup but we have to have it that way due to licensing.

Thanks again

Offline McNulty

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Re: WiNG 5.8 - 4 Nodes Cluster
« Reply #3 on: September 06, 2015, 03:43:48 PM »
AP650 requires a controller to operate. Any 4-digit AP does not e.g.AP6532

Asterisk means that there are crash files present. You can see the device which created them by using the cli command 'service show crash info'.

Zebra support would typically want to see the crash files if you log a ticket with them. You can clear the crash files files with 'service clear crash info'

Offline firmdale

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Re: WiNG 5.8 - 4 Nodes Cluster
« Reply #4 on: September 07, 2015, 06:56:37 AM »
McNulty

Thank you again for clarifying things up for me.
If that's the case with AP650s we will have to re-think our setup.

Regards
firmdale