[cisco-voip] Question: What version of CUCM extends the RTT window for Wan clustering subscribers.

[Jason Aarons (US)]

But didn't the minimum bandwidth requirement go up to full 1.54Mbps ?

 

From: cisco-voip-bounces at puck.nether.net [mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Jorge L. Rodriguez Aguila
Sent: Friday, March 14, 2008 4:46 PM
To: Grisham, Tom
Cc: cisco-voip at puck.nether.net
Subject: Re: [cisco-voip] Question: What version of CUCM extends the RTT window for Wan clustering subscribers.

 

Cisco "Relaxed" from 40 to 80 on 6.1

 

* Delay 

The maximum one-way delay between any two Unified CM 6.0 servers should not exceed 20 msec, or 40 msec round-trip time (RTT). Beginning with Cisco Unified CM Release 6.1, the maximum one-way delay between two Unified CM servers can be up to 40 msec, or 80 msec round-trip time. Measuring the delay is covered in Delay Testing <http://www.cisco.com/en/US/partner/docs/voice_ip_comm/cucm/srnd/6x/models.html#wp1044078> . Propagation delay between two sites introduces 6 microseconds per kilometer without any other network delays being considered. This equates to a theoretical maximum distance of approximately 3000 km for 20 ms delay or approximately 1860 miles. These distances are provided only as relative guidelines and in reality will be shorter due to other delay incurred within the network. 

 

Jorge Rodríguez Aguila

CCNA,CCVP

Senior Network Consultant

Netxar Technologies

jorge.rodriguez at netxar.com

Office 787-765-0058

PCS 787-688-8530

 

 

 

 

From: cisco-voip-bounces at puck.nether.net [mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Grisham, Tom
Sent: Friday, March 14, 2008 4:22 PM
To: cisco-voip at puck.nether.net
Subject: [cisco-voip] Question: What version of CUCM extends the RTT window for Wan clustering subscribers.

 

Can anyone share in which version of CUCM that the RTT boundaries will be "relaxed" or "extended" between subscribers clustered over the WAN.  It is my understanding that the 40ms boundary was to be adjusted somewhere in the 6.x or 6.1 Linux platforms.

 




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