[cisco-voip] SME or Leaf Subscriber Offline Timer

[Ryan Huff]

In what way are you classifying a "fail"?

Once a subscriber node goes offline, replication to that node will stop/fail at the next replication attempt with that node (and be marked down even sooner than that). If database replication for the ENTIRE cluster has failed, it isn't because of a subscriber that has gone offline (if you're talking about an OLD cluster version (6.x<) still using hub/spoke replication and the Publisher went down, different story).

The amount of time it takes from the time the subscriber goes on vacation to the time a replication attempt is made with that node and subsequently fails can vary, driven primarily, I believe, by the replication timeout set (latency issues aside if the subject replication traverses a WAN).

>From the CLI, a "show tech repltimeout" should show you the current timeout value set in the cluster. You can, cautiously and with purpose I would advise, set the replication values to something different using, "utils dbreplication setrepltimeout". As an example; for a 3-4 node cluster over WAN (using reasonable WAN latency 17Ms-20Ms<), I'd be comfortable with about 300 seconds (figuring each server taking a full minute to replicate).

The "Steps to Troubleshoot Database Replication" guide has a good read on this topic: http://www.cisco.com/c/en/us/support/docs/unified-communications/unified-communications-manager-callmanager/200396-Steps-to-Troubleshoot-Database-Replicati.html#anc7

Thanks,

Ryan

________________________________
From: cisco-voip <cisco-voip-bounces at puck.nether.net> on behalf of Glenn, Scott <Scott.Glenn at wwt.com>
Sent: Monday, May 15, 2017 12:18 PM
To: cisco-voip at puck.nether.net
Subject: [cisco-voip] SME or Leaf Subscriber Offline Timer

I am trying to find any document that stats a timeframe for which database replication fails or begins to fail if a subscriber is offline for X amount of time(number of hours or days).

Thanks,

Scott Glenn | Sr UC Engineer
CCIE Collaboration #54407
World Wide Technology, Inc.
402-305-0585
Scott.glenn at wwt.com

Sent from my iPhone
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