1. Microsoft Lync Server 2010High AvailabilityByron SpurlockFounder Architect - QuadrantechnologiesByrons@Quadrantechnologies.comhttp://Quadrantechnologies.wordpress.com/2011/

2. Session Objectives and Takeaways Webcast Objectives: Resiliency Architecture Branch Office Resiliency Data Center Resiliency

3. Agenda High Availability & Resiliency Architecture Branch Office Resiliency Data Center Voice Resiliency Metropolitan Data Center Resiliency

4. Agenda High Availability & Resiliency Architecture Branch Office Resiliency Data Center Voice Resiliency Metropolitan Data Center Resiliency

5. High Availability User Services Component (Presence & Registrar Component Conferencing) Registration and Routing Registrar Component Each registrar has its SQL Express DB Registration & Routing User Services Component Presence & Conferencing Registrar and User Services are collocated in same physical Front End in the DC All user end points register with same registrar Communicator 14 CS IP Phone Users are load balanced by Registrars using a Distributed Hash Algorithm Users Desktop Registrar can be installed in remote locations

6. Resiliency Architecture Each user has a Primary Registrar Pool. Discovers through DNS SRV. Directed to Primary & Backup Registrar Pool For Data Center User = Data Center For Branch User = Survivable Branch Appliance (SBA) Branch Users always register with the SBA Registrar unless it is unavailable Each Registrar Pool can have a Backup Registrar Pool Backup Registrar Pool = Data Center CS Pool Backup Registrar heart-beats Primary Registrar. If heart-beat not received within Backup starts accepting client registrations Configurable Failover Interval (default = 120 sec for branch offices)

7. Resiliency Architecture Data Center - EE Pool 1 Presence Conferencing Active Directory AD & DNS Registrar (Registration Bobs Primary Alices Primary & Routing) Registrar &Registrar & User User Services: Services: EE Pool 1 EE Pool 2 Backup Data Center - EE Pool 2 Branch Office Registrar Presence Conferencing Pool Active Directory AD & DNS Registrar Registrar Joes Primary (Registration Registrar: SBA & Routing) Survivable Branch Appliance User Services: EE Pool 1

8. Resiliency Architecture DNS Based Load Balancing for Internal Pools All traffic can be DNS Load Balanced except Client > Server HTTP Still require Hardware Load Balancer (HLB) for this traffic Windows Network Load Balancing (NLB) not supported for production Draining: Ability to drain a server before taking the server down Session Dialog Resiliency for Conferencing Even if the Front End goes down, User can still participate in a conference Client caches successful connections to Communications Server 14 FQDN and IP of SIP Registrar, Media Relay & Media Relay Authentication Server Reconnections are very fast

9. Agenda High Availability & Resiliency Architecture Branch Office Resiliency Data Center Voice Resiliency Metropolitan Data Center Resiliency

10. Branch Resiliency Options Users No Local Infrastructure or gateway onlyData Center 2 Medium Branch - (25-1000 users) 5 WAN SBA Survivable 50 Branch 0 Appliance(s) PSTN Active Directory 10 AD & DNS 00 Large Branch (>1000 users) Survivable Branch Server Circuit or Standard Edition Packet Server and Separate Media Gateway

11. Survivable Branch Appliance (SBA) CS Edge 14 WAN SBA Serve Pool r PSTN Data Center Branch Office

12. Survivable Branch Appliance (SBA) Components Functionality Go-To Market Windows Server 2008 SIP Registrar OEM (Embedded R2 Normal/Failover channel) mode Mediation Server SIP Proxy & Routing Current partners engine Audiocodes Registrar PSTN connectivity Dialogic Voicemail routing Ferrari PSTN Gateway PSTN re-routing HP Centrally provisioned NET Up to 1000 user support

13. SBA - Deployment Active Directory Add SBA to Move UsersCS14 Admin (Data Computer the to the SBA. Center) Topology. Join to Enable CS Start CS services.SBA Drop Technician connects Domain & Replication. Finish GW ConfigShipped to to WEB based GUI, complete SBA downloads and test PSTNBranch with IP Configuration. SW topology & Connectivity withSoftware configuratio configuration. temp userinstalled n. Request & Assign account. Certs.

14. SBA - Central Management Change Normalization Rules CS 14 Central Management Change Routing Rules ServerCS14 Admin (Data Change User Policies Store Configuration Center) Replicate to SBA Replica ted to the SBA Branch Office(s) SBA receives & processes replication

15. SBA - Support and Service SBA supported and serviced by the SBA partner Windows Server Updates SBA partner can act as the gatekeeper OR Customers can deploy updates Microsoft Communications Server 14" updates SBA partner will test and release product notice on whether a particular update can be applied on the Partner SBA Original equipment OEM Downloads notifies the manufacturer (OEM) Compatibility Partner addresses notified about and tests the customer on issues the issue if anyimpending CS Update update update compatibility X-5 Biz Date X X+30 Days MSFT Days Update

16. Features Available with WAN SBA - User Experience Down PSTN Inbound and Outbound calls WAN Up WAN Down Intra-Site calls, Inter site calls (PSTN All Features Available Basic Voice Features Rerouting) Available Hold, Retrieve, Transfer Authentication, Authorization Voicemail Deposit (Redirect to ExUM in Data Center) Voicemail Retrieve (through PSTN) Call Forwarding, SimulRing, Boss- Admin, Team-call Call Detail Records (CDR) All 2 Party Intra Site communications Features Unavailable Audio Conferencing through PSTN Inter-site Data (IM, App Sharing, etc.) Contact Search Conferencing (IM, Video and Web) Presence & DND based routing Modify Presence or Change Call Forwarding Settings Contact List Response Group and Call ParkResilient CS 14 clients: Communicator, Attendant Console, Communicator Phone Edit

17. SBA - Communications Server 14 Discovery Branch Office Data Center 1. DNS SRV Query Active Directory Response: (Multiple) Director Pool FQDN Active Directory Domain Services 2. TLS to Director Pool. SIP Register Domain Name Server Response: 401 Redirect to Cert Provisioning 5. SIP Register Bob Response: 301 Redirect CS 14 Primary: SBA FQDN, Backup: EE Pool Director FQDN 3. https;//PoolFQDN/CertSv 6. SIP-TLS* Register IIS - IWA Auth c 200 OK Get Certificate (Cert Auth)Client caches SBA FQDN** 4. Certificate And IP Address Lync Enterprise Edition SBA Replication Pool

18. Branch Client Registration Scenarios Normal Mode WAN Down SBA Down User Registers with Branch user: No Users register SBA change w/Backup registrar in External: Register to the datacenter Lync Lync pool LyncEdge Pool Edge Pool Edge PoolServe Serve Serve r r r Pool Data Center Data Center Data Center WA PST WA PSTN WAN PSTN N N N SBA SBA SBA

19. Branch Office: Server Connectivity when WAN down Branch Office Data Center TLS to cached FQDN and IP SIP Register SBA (Cert Auth) Active Directory Active Directory Domain Services 200 OK Bob Domain Name Server WAN Lync Director Branch Office DHCP* Options 120 Query DHCP Server or SBA FQDN CS DHCP on SBA Alice TLS to SBA FQDN SBA Lync Enterprise Edition(new client) SIP Register (Cert Auth) Pool 200 OK

20. Branch Client Media and Signaling Paths MediaWAN Available Signaling Intra-Branch Branch PSTN Calls Signaling/media dont SBA sends call to the PSTN traverse WAN No WAN involved SBA routes the call between the users Lync Lync Edge Pool Edge Pool Serve Serve r r Data Center Data Center WAN PSTN WAN PSTN SBA SBA

21. Branch Client Media and Signaling Paths Media Signaling Inter-Branch / HQ Branch User Calls through Edge Signaling/media traverse Call Routing through SBA WAN WAN used for Signaling, not SBA routesCS call to the the Media CS Edge 14 other pool Edge 14 Serve Pool Serve r Pool r Data Center Data Center WA PST WA PST N N N N SBA SBA

22. Branch Client Media and Signaling Paths MediaKey Failure Scenarios: WAN Down Signaling Intra-Branch Calls Inter-Branch/HQ Two-party Calls voice/video/IM/App Sharing SBA Initiates PSTN Rerouting Audio Conferencing through Media is over PSTN (Voice PSTN Lync Only) No Presence or Video Lync Edge Pool Conferencing Edge Pool Serve Serve r r Data Center Data Center WA PSTN WA PSTN N N SBA SBA

23. Branch Client Media and Signaling Paths Media Signaling External Branch SBA Down User Clients register w/Backup Registrar in DC Remote user has full functionality (excepting inbound PSTN) Lync Lync through data center pool Edge Pool Edge Pool Serve Serve r r Data Center Data Center WA PSTN WAN PSTN N SBA SBA

24. Agenda High Availability & Resiliency Architecture Branch Office Resiliency Data Center Voice Resiliency Metropolitan Data Center Resiliency

25. Data Center Voice ResiliencyFailover to Backup Data Center Lync pools operate as separate systems. Client DNS SRV request discovers one or multiple Lync Pools. That LyncPool directs client to primary and backup SIP registrar. Client connects to Backup if connecting to Primary Registrar Pool fails. Limited feature set available on failover. Enable/Disable automatic failover, configurable failover interval. Automatic Failback, configurable failback interval. If Primary Data Center cannot be restored: Restore Central Management Server in backup datacenter. Restore other services including Presence, Conferencing by moving users to other Pool.

26. Data Center Voice Resiliency Features Available to Users Failover to Backup Data Center In Case of Data Center Disaster PSTN Inbound calls (carrier provided) PSTN Outbound calls Lync Backup Lync Intra-Site calls and Inter site callsEdge Pool Registrar Edge PoolServe Serve Hold, Retrieve, Transfer r r Authentication, Authorization WAN 2 Party Intra Site Instant Messaging (IM) and WAN Audio/Video (A/V) Berlin Data Center Singapore Data Center Call Detail Records (CDR) Call Forwarding, Simultaneous Ringing, Delegation, Team-call Failover Features Unavailable Join conferences scheduled by users homed on other pool Conferencing Auto Attendant (AA) (through PSTN) Schedule IM, A/V & Web Conferences Presence and Do Not Disturb (DND) based routing Updating Call Forwarding settings Response Group Service & Call Park Voicemail Deposit (Redirect to Exchange UM in

27. Features Available to Users Data Center Voice Resiliency In Case of Data Center Paired SE Failover Disaster PSTN Inbound calls (carrier provided) PSTN Outbound calls CS 14 Intra-Site calls and Inter site callsEdge CS 14 SE Pool SE Pool Hold, Retrieve, TransferServe r Backup Authentication, Authorization Registrar 2 Party Intra Site Instant Messaging (IM) and Audio/Video (A/V) Data Center Call Detail Records (CDR) Call Forwarding, Simultaneous Ringing, Delegation, Team-call Failover Features Unavailable Join conferences scheduled by users homed on other pool Conferencing Auto Attendant (AA) (through PSTN) Schedule IM, A/V & Web Conferences Presence and Do Not Disturb (DND) based routing Updating Call Forwarding settings Response Group Service & Call Park Voicemail Deposit (Redirect to Exchange UM in

28. Data Center Voice ResiliencyFailover to Backup Data Center (Discovery) Berlin Data Center Backup LyncEdge Registrar Edge PoolServe AD DS & CS 14 Lync Serve Two r DNS Director Pool Pool r One WA 1 2 N Singapore Data Center 3 5 (4 (6) )

29. Agenda High Availability & Resiliency Architecture Branch Office Resiliency Data Center Voice Resiliency Metropolitan Data Center Resiliency

30. Metro Data Center Resiliency (supported post-GA) Features Available to Users If One Data Center goes Down NY Data Center NJ Data Center PSTN Inbound calls PSTN Outbound calls Active PassiveEdge SQL Low SQL Edge Intra-Site calls and Inter siteServe Serve r latenc r calls y Hold, Retrieve, Transfer WAN Authentication, Authorization FE 1-2 FE 3-4 2 Party Intra Site IM and A/V Call Detail Records (CDR) Call Forwarding, SimulRing Boss-Admin, Team-call Voice Apps (CAA, Response Group, Call Park) Conferencing (IM, A/V and Web) Presence and DND based Features Available routing Depending on Exchange UM Updating Call Forwarding Deployment settings Voicemail Deposit Voicemail Retrieve

31. Session Objectives and Takeaways Webcast Objectives: Resiliency Architecture Branch Office Resiliency Data Center Resiliency

32. 2011 Microsoft Corporation. All rights reserved. Microsoft, Windows, Windows Vista and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries.The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. 32 MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.