Zero downtime is one of the key principles in network design, in particular when building data-centers, where key applications and data need to be accessed at any given time. Content switches have traditionally been used to build scaleable and resilient data-centers offering local load balancing for the data-center front-end and multi-tier architectures. Over the past years enterprises and services providers around the world have started to utilize content switches (often in conjunction with other dedicated GSLB devices) to also provide redundancy across multiple distinct geographic locations. The session introduces Global Server Load Balancing (GSLB) concepts and terminology, like active-standby, active-active, and disaster recovery, before diving into a detailed description of the most common GSLB technologies, including DNS-based solutions, L3-based solutions (Route Health Injection) and HTTP-only mechanisms.
About the Presenter
Zeeshan Naseh, CCIE (#6838), is a Technical Leader in Cisco's World Wide Data Center Networking Practice within Advanced Services. His primary responsibility have been supporting Cisco's major customers, including service providers, wireless service providers, large enterprises, and financial institution. As a design consultant, Zeeshan has focused on Content Switching and Data Centers. Zeeshan has authored several white papers and design documents that have been published on Packet Magazine, IETF and on CCO (www.cisco.com). Zeeshan is the author of the data center book titled Designing Content Switching Solutions (ISBN: 1-58705213x).
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