Cisco Cisco Extended Care 1.0 Design Guide
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Cisco Extended Care 1.0 Solution Design Guide
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Chapter 2 Designing the Framework
Network Deployment Options
Application Recovery: The Cisco Extended Care data center applications are monitored for failures and
restarted using a leaky bucket scheme. That is, as long as the application fails less than a prescribed
number of times within a time period, it will be restarted automatically. If the application fails more than
the prescribed number of times within the time period, manual intervention is required to restore system
availability.
restarted using a leaky bucket scheme. That is, as long as the application fails less than a prescribed
number of times within a time period, it will be restarted automatically. If the application fails more than
the prescribed number of times within the time period, manual intervention is required to restore system
availability.
Externalized Database: Cisco Extended Care application data (not patient data) can be stored in an
external MySQL database in the Network File System server. This allows the system state to remain
persistent in the event of an application failure and allows availability to be restored in the fastest
possible time.
external MySQL database in the Network File System server. This allows the system state to remain
persistent in the event of an application failure and allows availability to be restored in the fastest
possible time.
Hardware Backup with Mirroring: You can maximize availability of your Cisco Extended Care by
implementing a redundant server and utilizing the vCenter Server to achieve high availability. With these
components in place, if the active server fails, the Cisco Extended Care applications will be migrated to
the spare server and will continue to run.
implementing a redundant server and utilizing the vCenter Server to achieve high availability. With these
components in place, if the active server fails, the Cisco Extended Care applications will be migrated to
the spare server and will continue to run.
In addition, the servers that are being used for this release provide high availability at the hardware level
by providing support for such features as RAID mirroring and dual power supplies.
by providing support for such features as RAID mirroring and dual power supplies.
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Network Availability: Various best practices like multi-pathing and running Hot Standby Routing
Protocol (HSRP) or Virtual Router Redundancy Protocol (VRRP) on network routers should be
implemented to provide a high available network platform.
Protocol (HSRP) or Virtual Router Redundancy Protocol (VRRP) on network routers should be
implemented to provide a high available network platform.
Network Deployment Options
Cisco Extended Care can be implemented either as an overlay network or as a converged network.
Overlay Network
With an overlay network, new servers, routers, switches and lines are installed specifically to handle
Cisco Extended Care. The network is built from the start using QoS best practices with adequate
bandwidth to handle an effective Cisco Extended Care software. Change management is simplified as
the changes required for the Cisco Extended Care network do not impact the other network applications
and vice versa.
Cisco Extended Care. The network is built from the start using QoS best practices with adequate
bandwidth to handle an effective Cisco Extended Care software. Change management is simplified as
the changes required for the Cisco Extended Care network do not impact the other network applications
and vice versa.
Converged Network
This alternative allows customers to leverage the existing investment in their production networks. This
is an option as long as that the current customer network can or will meet the overall requirements of the
converged network. The challenges are optimizing the network for additional load and real-time video
requirements and addressing change management requirements to enable integration of the new
components while keeping existing components stable.
is an option as long as that the current customer network can or will meet the overall requirements of the
converged network. The challenges are optimizing the network for additional load and real-time video
requirements and addressing change management requirements to enable integration of the new
components while keeping existing components stable.
Note
Real-time, in this instance, refers to the traffic classification of Cisco TelePresence.
2. These need to be configured and setup appropriately according to the deployment environment to enable higher
availability.