Lync 2010 High Availability
Download as PPTX, PDF3 likes3,840 views
This document discusses high availability and resiliency strategies for Microsoft Lync Server 2010. It covers resiliency architectures for branch offices and data centers. For branch offices, it describes the Survivable Branch Appliance which provides basic voice functionality when the WAN is down. For data centers, it explains how Lync pools can fail over to a backup data center and how "paired Standard Edition pools" provide resiliency. The document aims to outline resiliency architectures and capabilities for branch offices and data centers.
Lync 2010 High Availability
- 1. Microsoft® Lync ™ Server 2010 High Availability Byron Spurlock Founder Architect - Quadrantechnologies Byrons@Quadrantechnologies.com http://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 User’s 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 Bob’s Primary Alice’s 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 Joe’s 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 only Data 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 Users CS“14” Admin (Data Computer the to the SBA. Center) Topology. Join to Enable CS Start CS services. SBA Drop Technician connects Domain & Replication. Finish GW Config Shipped to to WEB based GUI, complete SBA downloads and test PSTN Branch with IP Configuration. SW topology & Connectivity with Software configuratio configuration. temp user installed n. Request & Assign account. Certs.
- 14. SBA - Central Management Change Normalization Rules CS “14” Central Management Change Routing Rules Server CS“14” 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 any impending 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 Park Resilient 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 Lync Edge Pool Edge Pool Edge Pool Serve 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 Media WAN Available Signaling Intra-Branch Branch PSTN Calls Signaling/media don’t 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 Media Key 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 Resiliency Failover 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 calls Edge Pool Registrar Edge Pool Serve 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 calls Edge CS “14” SE Pool SE Pool Hold, Retrieve, Transfer Serve 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 Resiliency Failover to Backup Data Center (Discovery) Berlin Data Center Backup Lync Edge Registrar Edge Pool Serve 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 Passive Edge SQL Low SQL Edge Intra-Site calls and Inter site Serve 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.