08-26-2008 05:56 AM - edited 03-18-2019 09:31 PM
Hello,
Scenario: Unity Primary and Failover at central location. Can we place a second failover Unity server at a DR site across a WAN? If memory serves I think I remember seeing something about Unity over WAN not being officialy supported bt I also seem to recall someon saying it would work as long as the delay and latency were under a certain limit.
Thanks in advance. All replies rated!
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08-26-2008 06:15 AM
First of all you cannot have 2 failover servers. Second of all splitting Unity across WAN is supported as long as the link is un-godly huge and delay is 2 ms.
Your other alternative is to use Unity Standby server which requires "only" 100Mb of dedicated bandwidth and 40 ms delay, a new concept in Unity 5.0. I would suggest reading up on the requirments in the Unity design doc.
HTH,
Chris
08-26-2008 06:15 AM
First of all you cannot have 2 failover servers. Second of all splitting Unity across WAN is supported as long as the link is un-godly huge and delay is 2 ms.
Your other alternative is to use Unity Standby server which requires "only" 100Mb of dedicated bandwidth and 40 ms delay, a new concept in Unity 5.0. I would suggest reading up on the requirments in the Unity design doc.
HTH,
Chris
08-26-2008 06:29 AM
Good post Chris, highlighting failover vs standby. +5 point here. Here's the documentation of the requirements for Unity 5.0
Failover Requirements for Separating Cisco Unity Servers by a WAN
â¢There must be two paths of connectivity between the Cisco Unity servers.
â¢Each path of connectivity must be gigabit speed or higher with no stead-state congestion.
â¢The maximum round-trip latency must be no more than 10 ms. A fixed network latency of 5ms or less is a best practice.
http://www.cisco.com/en/US/docs/voice_ip_comm/unity/5x/requirements/50cusysreq.html#wp567423
Requirements for Standby Redundancy are also defined in the same document
http://www.cisco.com/en/US/docs/voice_ip_comm/unity/5x/requirements/50cusysreq.html#wp538032
Regards,
Michael.
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