[cisco-voip] Unity Connection 10.5.2 Split Brain Recovery

[Erick Wellnitz]

I like both IOS and Linux ntpd

I synch those with time.nist.gov

Remember that you need a stratum 6 or better to sync UC apps like
connection or CUCM.

On Wed, Oct 28, 2015 at 11:35 AM, Charles Goldsmith <wokka at justfamily.org>
wrote:

> I personally prefer an IOS based device, a core switch or router.
>
> On Wed, Oct 28, 2015 at 12:33 PM, Thomas LeMay <thomaslemay at comcast.net>
> wrote:
>
>> Hi,
>>
>>
>>
>> Questions: What is the best business practice for the type of NTP server
>> to use as the source: windows or some other operating system?
>>
>>
>>
>> Thank you,
>>
>>
>>
>> Tom
>>
>>
>>
>> *From:* cisco-voip [mailto:cisco-voip-bounces at puck.nether.net] *On
>> Behalf Of *Aaron Banks
>> *Sent:* Wednesday, October 28, 2015 12:39 AM
>> *To:* Ryan Huff; cisco-voip at puck.nether.net
>> *Subject:* Re: [cisco-voip] Unity Connection 10.5.2 Split Brain Recovery
>>
>>
>>
>> Thank you for all of that.  You know what it was - NTP.  I shut down the
>> HA.  NTP was doing weird things on the primary node and I asked the
>> customer if the NTP server address he gave me was a windows server.
>> Bingo.  I changed the NTP source, rebooted the primary, called voicemail
>> and then powered on the HA.
>>
>> Lesson learned.
>> ------------------------------
>>
>> From: ryanhuff at outlook.com
>> To: amichaelbanks at hotmail.com; cisco-voip at puck.nether.net
>> Subject: RE: [cisco-voip] Unity Connection 10.5.2 Split Brain Recovery
>> Date: Tue, 27 Oct 2015 17:25:47 +0000
>>
>> 1.) Shut down the HA node.
>>
>>
>>
>> 2.) Reboot the primary node
>>
>>
>>
>> 3.) Once the primary node is up, place a call into voicemail
>>
>>
>>
>> 4.) Power the HA node back on
>>
>>
>>
>> 5.) Once HA is up, verify HA status.
>>
>>
>>
>>
>>
>>
>>
>> Sent from my T-Mobile 4G LTE Device
>>
>>
>>
>> -------- Original message --------
>> From: Aaron Banks
>> Date:10/27/2015 12:35 PM (GMT-05:00)
>> To: cisco-voip at puck.nether.net
>> Subject: [cisco-voip] Unity Connection 10.5.2 Split Brain Recovery
>>
>>
>>
>> Has anyone seen/resolved a split brain recovery in Unity Connection
>> 10.5.2?  The primary and secondary keep swapping back and forth every few
>> minutes.  I can ping and trace to each server.  I restarted the primary but
>> that did not resolve the issue.  In the RTMT system logs, the secondary
>> sends an NTP query to the primary the response is the primary is
>> inaccessible or down.  I'm stumped.
>>
>> _______________________________________________
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>> cisco-voip at puck.nether.net
>> https://puck.nether.net/mailman/listinfo/cisco-voip
>>
>>
>
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