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Side-by-side migration: Can R1 mediation server exist without R1 pool? RRS feed

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    Dear all,

    We are currently transitioning from R1 to R2.  We use the same dialplan/routing/policies for R1 and R2. Everything on the R2 front-end (standard) servers seems to be in order, so I can migrate all users  to the new R2 server.  It will take a while before our new hardware comes in that will be used to built the R2 mediation server.  In the meantime I would like to remove the R1 FE server already. 

    The migration documentation seems to state that all old servers are removed at the very end of the process, but the mediation server seems to be somewhat "independant" from the pools (according to the logic of the display in management tools anyway).

    Is it possible to remove the R1 pool without affecting the R1 mediation server?

    Thanks for your comments,
    Best Regards
    Wim

    Friday, June 5, 2009 5:28 AM

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    In short, you should keep the OCS 2007 RTM (R1) server roles around as R2 server roles may not work with RTM pools and/or clients. Take a look at the following:

    Supported Migration Paths and Coexistence Scenarios
    http://technet.microsoft.com/en-us/library/dd425356(office.13).aspx

    Migration From Office Communications Server 2007
    http://technet.microsoft.com/en-us/library/dd572505(office.13).aspx



    Hope this helps. Do let us know. Thanks!
    http://www.leedesmond.com
    Friday, June 5, 2009 11:42 AM
    Moderator
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    Wim,

    You can retain the R1 Mediation server as it can coexist with an R2 Front-End deployment.  Keep in mind that any new R2 voice features (e.g. Single Number Reach) will not be availble until upgrading the Mediation role, but existing voice features will still work.  You'll simply need to reconfigure the Mediation server to communicate with the new pool server(s).
    Jeff Schertz, PointBridge | MVP | MCITP: Enterprise Messaging | MCTS: OCS
    Friday, June 5, 2009 1:19 PM
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    Hi all,

    @Desmond:  I realise that.  All clients and call objects (Exchange SA and AA) are now migrated to the new R2 pool, so the R1 server is currently idling.  But, thanks for the warning.

    @Jeff:  I changed the config on the mediation server: now it routes all calls to the R2 FE server.  I almost forgot about this. Thanks.

    The idea is to free up resources by removing our current R1 FE server, because it could be a few weeks before the R2 mediation server comes online to finalise the switch-over. 

    Thanks for letting me know this is indeed possible.  Last weekend I migrated all users and objects + switched the mediation server setting.  This way the R1 pool is not used anymore (no edge servers).  I will keep it running for one more week, after which I will deactivate it.

    Thanks again for your comments,
    Best Regards
    Wim
    Monday, June 8, 2009 9:49 AM