Avaya Aura Communication Manager Greater than 5 Nines Availability

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1 Avaya Aura Communication Manager Greater than 5 Nines Availability Table of Contents Executive Summary...1 Linux-based Software...1 Survivable Core...2 Survivable Remote Branch...3 SIP and TDM Availability...4 High-availability WAN/LAN...4 Conclusion Executive Summary Avaya Aura Communication Manager is a vital component of an industry best-in-class redundant server solution that can support the available uptime today s businesses demand. It is designed to deliver greater than the high-availability industry standard of 5 nines, or % uptime, in both Avaya Aura Communication Manager Non-Virtualized and Virtualized Environments. This equates to a downtime calculation of only 5.26 minutes or less per year. Avaya Aura Communication Manager features several key differentiators that help it achieve this high level of performance. These include best-inclass secure Linux software, duplicated mirrored core servers, fully-replicated remote core server/servers, and fully-replicated remote branch failover servers. Linux-based Software Avaya Labs is continuously improving Avaya s Linux-based operatingsystem software, known throughout the industry for customized selfmonitoring capabilities, delivering built-in intelligence including self-healing abilities at all levels. Because Avaya software is Mission-critical Linux secured, there are fewer vulnerabilities than competitive software operating systems, adding to the %+ availability equation. Avaya Aura Communication Manager duplicated server pairs support memory shadowing. This enables full call preservation during server interchange (no interruption in service). This is a unique advantage over Avaya s main competitor because capabilities within an established call--like Transfer, Hold and Conference--can still take place during CM-to-CM switching. avaya.com 1

2 The Avaya Aura platform includes Mission-critical Linux software for a Greater than 5 Nines solution, providing the confidence to deliver collaboration to the most intensive parts of your business. Software upgrades and patches can be performed while staying in operation. Perhaps more importantly, moves, additions and changes can be performed on either server pair and replicated back without service interruption. This represents another advantage over our main competition and another element of high availability. Avaya Linux-based software is the foundation of the ultra-reliable Avaya Aura Core, including Session Manager. Survivable Core Well-planned, high availability solutions include geographically-redundant Data Centers with a backup survivable core. Main Data Centers can experience service outages due to natural disasters, hardware failure, software failure, sabotage or through other means. With Avaya Aura Communication Manager and Avaya Aura Session Manager (AASM) in the diagram below, the survivable core includes a single-server solution. Utilizing the Avaya Aura Virtualized Environment, only three servers are needed to provide full-featured stateful failover capabilities with automatic failback including Contact Center. A key Avaya differentiator: Moves, additions and changes can be made while the Survivable Core is active a benefit Avaya s primary competitor simply cannot deliver. Unique to Avaya, administration changes can even be applied at Data Center 2 during failover mode. Another advantage: Avaya Aura Communication Manager and Avaya Aura Session Manager survivable cores can be supported anywhere on the globe, with 1,000 millisecond delay. Our main competitor is limited to only 500 millisecond delay in their latest software load. What this means is Avaya software delivers data packets that travel longer at twice (2x) the distance without degradation. avaya.com 2

3 Avaya Competitive Advantage: Avaya Aura Communication Manager and Session Manager survivable cores can be supported anywhere on the globe with 1,000 millisecond delay. Survivable Remote Branch Avaya s Survivable Remote Branch is a green-friendly S8300 Server blade that fits into either the G430 or G450 Gateway. S8300 is greenfriendly for two reasons: 1) It features a smaller footprint because the S8300 is contained inside a G4xx Gateway; and 2) The S8300 blade consumes only 30W, compared to normal server averages of 150W. With a complete loss of the WAN or Data Centers 1 & 2, the Survivable Remote Branch takes over, functioning like a standalone system with SIP and/or TDM Trunking capabilities. Other business benefits include: Avaya Aura solutions are designed to continue service in the face of many failure events. Stable calls stay up in the event of loss of connectivity to the primary servers. IP phone and gateways do not lose registration in the event of short network outages. Such resiliency is captured in the mathematical model in assessing total system availability. Full feature failover capabilities, including Contact Center Agents, vectors, and announcements. Programming complexity is eliminated with survivable remote. Businesses benefit from lower TCO because only single-touch administration is required at the main location. Upgrades and patches are pushed out from main location to survivable remotes, another savings that reduces multiple onsite touches. Survivable Remote Branch contains full backup translations of the Avaya Aura Communication Manager Main Server pairs. Connection-preserving failover/fall back, calls between two or more parties are not dropped with SIP sessions and/or local TDM Trunking. What do we experience in Survivable Remote Branch? 2 to 3 WAN/LAN outages per year x 3 minute detection x 5% =18 to 27 seconds Average downtime experienced per end user as the result of WAN failure events (1- (27 seconds)/ (seconds in a year)) = %. Includes server/survivable remote and power/environment availability Branch Availability over redundant WAN link: % x % x % = % Note in Avaya labs testing the detection and failover completed on average was less than 2 minutes. avaya.com 3

4 Avaya Aura Session Manager supports Call Preservation in the event of a network or Session Manager failure in the core. This capability enables Contact Center calls in queue to be processed in the normal manner, without any interruption or loss in service. Avaya Software quality check and assessment of software reliability: Avaya carefully examines every step of software development by measuring faults during the coding phase-- the data used in assessing software reliability prediction* analysis. This has involved measuring software performance data of more than 12,000 systems in the field. SIP and TDM Availability Avaya Aura Session Manager employs Internet Engineering Task Force (IETF) standard RFC 5626 to deliver multiple, simultaneous registrations to SIP endpoints. Avaya and RFC 5626-compliant SIP endpoints can register with multiple core Session Managers and with Survivable Remote Branch for simultaneous registrations. Combined with Avaya s unique application of the SIP Timer B and OPTIONs messaging, calls can be placed during network outages without dropping. Avaya Aura Session Manager reaches 6 Nines ( %) availability, complementing Communication Manager %+ high-availability status. Session Manager also supports Network Interface Card (NIC) bonding and up to 10 geo-redundant Session Manager instances. SIP and TDM Trunking back each other up in case one or the other loses service from the PSTN. TDM Trunking is distributed across G4xx Gateways, adding another layer of high availability. High availability can be accomplished with the PSTN, and the ratio between SIP and TDM trunks should be engineered and load balanced according to business requirements. Geographic-Redundancy *According to the methodology recommended by Telcordia GR-2813-CORE, Software Reliability Prediction avaya.com 4

5 High-availability LAN/WAN Markov Chain Reliability Modeling is used as the mathematical model for predicting total system availability. The advantage of this technique over others (for example, the parts count and combinatorial models) is its ability to capture the fault-tolerant aspect of the platform. For the purpose of meeting high availability, the recommended network topology should consist of a redundant LAN/WAN with building blocks of layered routers and switches. Using a virtual fabric like Avaya Fabric Connect provides multiple paths and link redundancy, minimizing disruption of service due to failure events, link congestions, denial of service attacks, etc. When a link failure is detected, the fabric adapts and rebalances with no service disruption. This enables seamless service orchestration and accommodates endpoint mobility for improved resiliency and lower cost. Conclusion Competitors claim their own version of % high availability; however Avaya truly offers business-benefitting differentiators including: Avaya Aura Communication Manager redundant server solution moves, adds, patches/upgrade changes can be applied to either server with zero down time. Avaya s Survivable Remote Branch solution lowers TCO with singletouch administration at the core. Avaya Aura software is 100% replicated out to survivable cores and survivable remote branch locations for full feature failover and failback capability. This includes Contact Center Elite. Avaya Aura software includes patented Expert Systems, the built-in monitoring, failure detection, and self-healing recovery mechanism. Avaya Aura Session Manager 6-nines availability complements the 5-nines availability for Avaya Aura Communication Manager. About Avaya Avaya is a global provider of business collaboration and communications solutions, providing Unified Communications, contact centers, networking and related services to companies of all sizes around the world. For more information, visit Learn More To learn more and obtain additional information such as white papers and case studies about Avaya Aura Platform, please contact your Avaya Account Manager or Authorized Partner. Or visit us at: Avaya Inc. All Rights Reserved. All trademarks identified by,, or SM are registered marks, trademarks, service marks, respectively, of Avaya Inc. avaya.com 5