Voice Resiliency in Lync Server 2010 Justin Morris UC Consultant (and Australian) @jm_deluxe www.justin- morris.net [email protected]
Jun 01, 2015
Voice Resiliency in Lync Server 2010
Justin MorrisUC Consultant (and Australian)
@jm_deluxe
www.justin-morris.net
What’s your story?
• Have you deployed Lync already?• Connected OCS/Lync to the PSTN before?• Know what a SIP 301 Redirect is?• Know what SDP and RTCP is?• Don’t know what I’m talking about?
New Resiliency Features in Lync
• DNS Load Balancing• Lync client caches front end IP addresses.• FEs balance users across servers.• HLB only for HTTP traffic.
• Registrar Service on each Front End Server.• Backup Registrar.• Limited Functionality Mode in Lync.
Business Requirements
• Determine them!• Know what it is your organisation wants• Is it productivity gains? Cost savings?
• Work out what features of Lync you will deploy.
• What level of availability/recovery do you require?
• In short - do the necessary due diligence.
What technical solutions are available?
• Within, and for your Central Site• Enterprise Edition Front End Pool• Metropolitan Data Centre Resiliency• Backup Registrar
• For your Branch Sites• Survivable Branch Appliance (SBA)• Survivable Branch Server (SBS) + Gateway• Standard Edition Server + Gateway
Resiliency within your Central Site
• Enterprise Edition Front End Pool• Up to 10 Front End servers• AV Conferencing Server Role can be split
out for greater scalability• Backend on SQL 2005-2008 R2 Cluster• Problem: snom phones don’t like EE pools
because they can’t understand DNS load balancing
Resiliency within your Central Site
Resiliency for your Central Site
• Backup Registrar• Requires a Standard Edition server
allocated as a Backup Registrar for a pool in Topology Builder.
• Secondary DNS SRV records must be created.
• Client gets “limited functionality mode”.
Resiliency for your Central Site
Resiliency for your Central Site
• Metropolitan Data Centre• The most difficult to deploy and manage.• Requires: • Stretched VLAN across sites. • Stretched SQL 2008/2008 R2 cluster.• Synchronous data replication.• <20 ms latency between sites.• Global hardware/DNS load balancing.
Resiliency for your Central Site
Branch Site Resiliency
• Survivable Branch Appliance (SBA).• 1 RU chassis running Windows and Lync.• Has ISDN E1 ports in it for PSTN
connectivity.• Made by hardware vendors.• For 25 - 1000 users.• Has no conferencing capability.• Just Registrar and Mediation services.• Users are homed on this pool (server).
Branch Site Resiliency - SBA
Branch Site Resiliency
• Survivable Branch Server (SBS) + Gateway.• A Windows server you deploy.• For 1000 - 5000 users.• Has no conferencing capability.• Just Registrar and Mediation services.• Users are homed on this pool (server).
Branch Site Resiliency - SBS
Branch Site Resiliency
• Standard Edition Server + Gateway• A Windows server you deploy.• For greater than 5000 users.• Does have full conferencing capability i.e.
MCUs.• Users are homed on this server.
Branch Site Resiliency – SE Server
Conclusion
• Know what your existing IT environment is capable of.
• Engage your voice, network, security and server teams WELL in advance.
• Ensure you understand your voice resiliency requirements and select a solution accordingly.
• Enjoy the ride and the awesomeness.