Nortel Networks NN43001-121 - Manual (Page 84)

84 Planning and engineering
MCM 2.0 to MCM 3.0
There is no direct upgrade path from MCM 1.0 or 2.0 to MCM 3.0 . MCM
3.0 must be installed on the OCS Proxy server. The OCS Proxy install is
done from command line and not from the install wizard. It is still possible
to preserve the configuration data from a previous installation by first
performing a backup operation on MCM 2.0 and restore the data to MCM
3.0 on the OCS Proxy server. However, this will cause the new configuration
parameters to be set to default values as follows:
Table 18
Default configuration parameters
Parameter Default value
Call Server CS1000
MediationServer enabled
RoutingTable empty
DialPlan CDP
AccessCode empty
For more information on MCM 3.0 configuration, see "MCM configuration"
(page 134)
Load balancer considerations
You cannot use a single logical load balancer for LCS 2005 and OCS 2007.
For example, if you have an LCS 2005 application proxy with MCM 2.0
attached to a logical load balancer, you cannot simultaneously attach an
OCS Proxy server with MCM 3.0 to the same one. This same restriction
applies to all other server roles.
Migration planning from LCS 2005 to OCS 2007
Live Communications Server 2005 with SP1 can only be upgraded to
Office Communications Server 2007 by using a side-by-side migration.
This involves deploying an Office Communications Server 2007 Standard
Edition or Enterprise pool alongside existing Live Communications Server
2005 with SP1 Standard Edition or Enterprise pool thus allowing the two
environments to coexist with minimal service disruption.
When migrating servers, Office Communications Server 2007 servers
should be deployed using a phased, outside-in approach. This involves
replacing the Access Proxies with Office Communications Server 2007
Access Edge Servers before you migrate to Office Communications Server
2007 in your internal environment. Upgrading all the servers of a particular
type at one time will help to minimize service disruptions.
The following flow chart depicts the migration phases:
Nortel Communication Server 1000
Nortel Converged Office Fundamentals — Microsoft Office Communications Server 2007
NN43001-121 01.03 Standard
Release 5.0 30 April 2008
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