Step By Step Cisco IM&P and Microsoft Lync Intradomain Federation Lab (1)

Step By Step Cisco IM&P and Microsoft Lync Intradomain Federation Lab (1)

When organisations migrate to Jabber, the Cisco instant messaging and presence (IM&P) solution, more often than not, they already have Microsoft Office Communicator (OCS) or Lync in the environment.  This lab demonstrates how to integrate Cisco Jabber with Microsoft Lync so that Jabber user and Lync user can chat and share presence with each other.

Step By Step Cisco IM&P and Microsoft Lync Intradomain Federation Lab (4)
Step By Step Cisco IM&P and Microsoft Lync Intradomain Federation Lab (3)
Step By Step Cisco IM&P and Microsoft Lync Intradomain Federation Lab (2)

System integration and migration is always more challenging than fresh build, which makes our IT integrator’s work more fun. Yes, playing with technology can be more fun than Zelda even!

When organisations migrate to Jabber, the Cisco instant messaging and presence (IM&P) solution, more often than not, they already have Microsoft Office Communicator (OCS) or Lync in the environment.  This lab demonstrates how to integrate Cisco Jabber with Microsoft Lync so that Jabber user and Lync user can chat and share presence with each other.

Lab Overview

The following diagram depicts our lab topology including:

  • Microsoft domain services, with Active Directory (AD), Domain Name Server (DNS) and Certificate Authority (CA);
  • 2 -node Cisco Unified Communications Manager (CUCM) cluster;
  • 2-node CUCM IM&P cluster joining the CUCM cluster (Ref. 1 for installation guide);
  • A Microsoft Lync Standard Edition server in standalone mode (Ref. 2 for Lync 2013 Standard Edition v.s. Enterprise Edition);
  • The standalone Lync server functions as the front end server and comes with MS SQL Express;
  • The lab domain is altairx.lan. The CUCM cluster has LDAP integration with the Microsoft AD, for user retrieval and authentication. The Lync server joins the domain; and
  • ‘blee’ is our Jabber test user and ‘jsmith’ is our Lync test user. CUCM is the registrar for ‘blee’; while Lync server is the registrar for ‘jsmith’. As the lab result, we’d expect blee and jsmith to chat with each other.
  • Please note, the test users can NOT exist on Lync and Cisco CUCM at the same time in our scenario. The SIP routing will search locally for user existence first, if not then route to an external SIP service provider. For example, if ‘blee’ was a Lync user and to be migrated to Jabber; we will have to remove ‘blee’ from Lync instead of ‘Temporarily disable for Lync Server’. Please refer to Ref. 3 for Lync to Cisco IM&P migration.
  • Cisco Unified Communications (UC) servers are outline in Green; while Microsoft Lync server is outlined in Blue.

Intradomain federation between Cisco Jabber IM&P and Microsoft Lync

Configuration Overview

I summarised the configuration flow into the following diagram. Each swim lane describes a configuration stage and/or environment. The next blog in the series will cover 1.0 to 4.0 in sequence, with step by step instructions and screenshots. If you have any questions on 0.0, please refer to Reference 1 for Cisco IM&P server deployment and Reference 4 for Lync 2013 deployment.

The Cisco IM&P and Microsoft Lync federation is actually SIP static routing over TLS, port 5061. Certificates play a significant role here, peer authentication and SIP communication encryption. Therefore, I plan to separate a section (4.0) on those certificates.

I will also include some troubleshooting techniques in the series. There are some caveats such as the Lync static routing assigned to a specific registrar will overwrite the global static routing, peer negotiation error due to certificate issues and etc.

Reference

  1. Installation Guide for Cisco Unified Communications Manager and IM and Presence Service Release 11.5(1): https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/install/11_5_1/cucm_b_installation-guide-cucm-imp-1151.html
  2. Deployment overview for Lync Server 2013: https://technet.microsoft.com/en-us/library/jj205305(v=ocs.15).aspx
  3. Partitioned Intradomain Federation for IM and Presence Service on Cisco Unified Communications Manager, Release 11.5(1)SU2: https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/im_presence/intradomain_federation/11_5_1_SU2/cup0_b_partitioned-intradomain-federation-imp-1151su2/cup0_b_partitioned-intradomain-federation-imp-1151su2_chapter_0111.html
  4. Test Lab Guide: Demonstrate Lync Server 2013: https://www.microsoft.com/en-us/download/details.aspx?id=41538

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