Cisco UCS has a unique
architecture that integrates compute, data network access, and storage network
access into a common set of components under a single-pane-of-glass management
Cisco UCS fuses access layer
networking and servers. This high-performance, next-generation server system
provides a data center with a high degree of workload agility and scalability.
The hardware and software components support Cisco's unified fabric, which runs
multiple types of data center traffic over a single converged network adapter.
Figure 1. Cisco Unified
Computing System Architecture
reduces the number of required devices and centralizes switching resources. By
eliminating switching inside a chassis, network access-layer fragmentation is
significantly reduced. Cisco UCS implements Cisco unified fabric within racks
and groups of racks, supporting Ethernet and Fibre Channel protocols over 10
Gigabit Cisco Data Center Ethernet and Fibre Channel over Ethernet (FCoE)
links. This radical simplification reduces the number of switches, cables,
adapters, and management points by up to two-thirds. All devices in a Cisco UCS
domain remain under a single management domain, which remains highly available
through the use of redundant components.
The management and
data plane of
is designed for high availability and redundant access layer fabric
interconnects. In addition, Cisco UCS supports existing high availability and
disaster recovery solutions for the data center, such as data replication and
application-level clustering technologies.
domain supports multiple chassis and their servers, all of which are
administered through one Cisco UCS Manager. For more detailed information about
the scalability, speak to your Cisco representative.
domain allows you to quickly align computing resources in the data center with
rapidly changing business requirements. This built-in flexibility is determined
by whether you choose to fully implement the stateless computing feature. Pools
of servers and other system resources can be applied as necessary to respond to
workload fluctuations, support new applications, scale existing software and
business services, and accommodate both scheduled and unscheduled downtime.
Server identity can be abstracted into a mobile service profile that can be
moved from server to server with minimal downtime and no need for additional
With this level of flexibility, you can quickly and easily scale
server capacity without having to change the server identity or reconfigure the
server, LAN, or SAN. During a maintenance window, you can quickly do the
servers to meet unexpected workload demand and rebalance resources and traffic.
Shut down an
application, such as a database management system, on one server and then boot
it up again on another server with increased I/O capacity and memory resources.
has been optimized to implement VM-FEX technology. This technology provides
improved support for server virtualization, including better policy-based
configuration and security, conformance with a company's operational model, and
accommodation for VMware's VMotion.