Cisco Cisco TelePresence Video Communication Server Expressway
OCS Relay configuration of “Lync Gateway” Cisco VCS(s)
Cisco VCS Deployment Guide: Microsoft Lync 2010 and Cisco VCS X6.1
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relating to this FindMe™ and any Lync users registered with this ID all ringing simultaneously – rather
than the return call being addressed directly back to the single endpoint that made the call.
than the return call being addressed directly back to the single endpoint that made the call.
OCS Relay and a cluster of Cisco VCSs
From Cisco VCS X5.0 OCS Relay can be enabled in a cluster of Cisco VCSs. When used in a cluster
of Cisco VCSs, the OCS Relay FindMe™ users will be shared across cluster peers (using an
algorithmic distribution scheme). Each cluster peer will register its own OCS Relay FindMe™ users to
Lync Server. When calls are made from Lync Server to OCS Relay FindMe™ users Lync Server will
send the call to the Cisco VCS peer that registered that user – hence the calls are statically load-
shared across the Cisco VCS peers.
of Cisco VCSs, the OCS Relay FindMe™ users will be shared across cluster peers (using an
algorithmic distribution scheme). Each cluster peer will register its own OCS Relay FindMe™ users to
Lync Server. When calls are made from Lync Server to OCS Relay FindMe™ users Lync Server will
send the call to the Cisco VCS peer that registered that user – hence the calls are statically load-
shared across the Cisco VCS peers.
Note: Calls to Video endpoint IDs that are not OCS Relay FindMe™ user IDs will not match a
registered user, and so will be routed by the static domain route configured in Lync Server. These
calls to non-OCS Relay FindMe™ endpoints will therefore be delivered to a single Cisco VCS peer or
a range of Cisco VCS peers (slowly rotating) if a round-robin DNS address is configured in Lync
Server. (When using round-robin, Lync Server rotates peers approximately once per 5 seconds - this
helps with resilience, but is not fast enough to provide effective load sharing.
registered user, and so will be routed by the static domain route configured in Lync Server. These
calls to non-OCS Relay FindMe™ endpoints will therefore be delivered to a single Cisco VCS peer or
a range of Cisco VCS peers (slowly rotating) if a round-robin DNS address is configured in Lync
Server. (When using round-robin, Lync Server rotates peers approximately once per 5 seconds - this
helps with resilience, but is not fast enough to provide effective load sharing.
Configure OCS Relay and FindMe™
It is best practice to keep the video endpoints in their own domain, and just have the FindMe™ users
on the “Lync gateway” Cisco VCS with the same domain as Lync Server. This avoids any confusion as
to what functionality will be received for each entity. When a call arrives for the FindMe™ user,
FindMe™ will forward calls appropriately to the defined endpoints, whichever domain they are in.
on the “Lync gateway” Cisco VCS with the same domain as Lync Server. This avoids any confusion as
to what functionality will be received for each entity. When a call arrives for the FindMe™ user,
FindMe™ will forward calls appropriately to the defined endpoints, whichever domain they are in.
For example, when user2@test-customer.com is called, the call will fork to the Lync client with the
same name, and also to user2.office@vcs.domain and user2.external@vcs.domain (assuming that
these two vcs.domain devices are listed as primary devices in User2’s FindMe™.
same name, and also to user2.office@vcs.domain and user2.external@vcs.domain (assuming that
these two vcs.domain devices are listed as primary devices in User2’s FindMe™.
Note: It is strongly recommended that the user is created on Lync Server first and then FindMe™
accounts created on Cisco VCS 5 to 10 minutes later, when the user is fully available on Lync Server.
accounts created on Cisco VCS 5 to 10 minutes later, when the user is fully available on Lync Server.
Active Directory configuration
Ensure that Active Directory user accounts exist for all FindMe™ accounts on the “Lync Gateway”
Cisco VCS(s) that will register to Lync (FindMe™ accounts that have the same domain as Lync).
Cisco VCS(s) that will register to Lync (FindMe™ accounts that have the same domain as Lync).
On the PC running the Active Directory for Lync users:
1. Select Start > All Programs > Administrative Tools > Active Directory Users and
Computers.
2. Select the ‘Users’ folder under the required domain: