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Super Contributor II
Posts: 353
Registered: ‎02-22-2011

IAP - Cluster communications fail and master ip set to 169.254.x.x

Hi All, I've got an installation that keeps failing at random times for no apparent reason. 

 

The install consists of 5 x IAP-225 running 6.4.2.6-4.1.1.7 code. All AP's are statically addressed with a VC address defined as well. 

 

Everything generally works fine but once in a while, the AP's will reboot with no log entry and when they come back up, the master is operational but all the slaves are disconnected. When you login to the slave CLI you can see that the master IP they are trying to contact is a 169.254 address. There is no DHCP involved anywhere here. 

 

Anybody experienced this?

 

If i reboot the master VC it seems to all come back up fine. 

 

None of the devices are using Eth1.

 

This is from the active master (show summary)

 

Master IP Address *:192.168.1.251
IP Address :192.168.1.251
Netmask :255.255.255.0
Gateway :192.168.1.1

 

This is from a slave:

 

Master IP Address :169.254.107.171
IP Address :192.168.1.250
Netmask :255.255.255.0
Gateway :192.168.1.1

 

 

 

When the slaves reboot i see this in the logs:

 

Jan 18 07:15:54 cli[5287]: <341135> <WARN> |AP APNAME1@192.168.1.250 cli| Master Changed - new 169.254.107.171 old 0.0.0.0 current swarm state 0.
Jan 18 07:15:55 cli[5287]: <341135> <WARN> |AP APNAME1@192.168.1.250 cli| Master Changed - new 169.254.107.171 old 0.0.0.0 current swarm state 1.

 

 

And on the master I see:

 

Jan 18 10:12:52 stm[5302]: <304067> <ERRS> |AP APNAME1@192.168.1.250 stm| PAPI_Send failed: papi_send_status_callback, 2877: Connection timed out; from 8451 to 169.254.107.171:15200 len 27 type 115

 

For some reason it seems the Master forgets who it is?

 

Scott

MVP
Posts: 4,238
Registered: ‎07-20-2011

Re: IAP - Cluster communications fail and master ip set to 169.254.x.x

Are you sharing that segment with any other devices ?

Duplicate IP address ?

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Thank you

Victor Fabian
Lead Mobility Engineer @ Integration Partners
AMFX | ACMX | ACDX | ACCX | CWAP | CWDP | CWNA
Super Contributor II
Posts: 353
Registered: ‎02-22-2011

Re: IAP - Cluster communications fail and master ip set to 169.254.x.x

Hi Victor, yes its shared segment, i had considered the possibility of a duplicate but have not been able to detect one yet. Will try and lab test this and see if i can reproduce.

 

 

MVP
Posts: 1,412
Registered: ‎11-30-2011

Re: IAP - Cluster communications fail and master ip set to 169.254.x.x

169.254. is the range for dhcp failures (not officially but still). so perhaps some "rogue" IAP that messes things up? sometimes it is suggested to use fixed IPs so rule out such issues.

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