Cisco Cisco TelePresence Video Communication Server Expressway

Appendix 9 – Upgrading from non-B2BUA mode to B2BUA mode

Cisco VCS Deployment Guide: Microsoft OCS 2007 R2, Lync 2010 and Cisco VCS X7.1

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Appendix 9 – Upgrading from non-B2BUA
mode to B2BUA mode

After upgrading the OCS/Lync gateway VCS (cluster) to X7.0, the following procedure should be used
to migrate from use of OCS Relay, neighbor zones and CPL to using the B2BUA and registered
FindMe users.

On VCS:

1. Back up the VCS configuration:

Maintenance > Backup and restore > Create system backup

file

. If using a VCS cluster, this has to be done on all cluster peers.

2. Go to

VCS configuration > Dial plan > Search rules

and delete all search rules targeting the

neighbor zone(s) towards OCS/Lync.

3. Go to

VCS configuration > Zones

and delete all neighbor zones pointed towards OCS/Lync

peers

4. If previously using OCS Relay:

a. Go to

VCS configuration > Call Policy > Configuration

and click Delete uploaded file. If

using a VCS cluster, this has to be done on all cluster peers. Please note that if the OCS
Relay-specific CPL has been combined with other CPL, the OCS Relay-specific CPL needs
to be removed from the active CPL script and the modified CPL re-loaded.

b. Go to

Applications > OCS Relay

and set OCS Relay Mode to Off.

5. Go to

VCS configuration > Protocols > Interworking

and set H.323 <-> SIP interworking

mode to Registered only.

6. Configure the B2BUA as previously described (section “Configure the B2BUA on the “OCS/Lync

gateway” VCS”.

On OCS/Lync Servers:

Make sure that no static domain routes exist from OCS/Lync to VCS for the OCS/Lync shared domain.