Netgear XSM7224-100NES Datasheet download pdf (Page 8)

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10 Gigabit Managed Switches M7100 series

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Target Application

10 Gigabit Ethernet and the server edge:

better efficiency

Mid-sized organizations are optimizing their data centers and

server rooms by consolidating servers to free up space, power, and

management overhead. The first step usually involves consolidating

applications onto fewer servers than the old single-application-per-

server paradigm. Often, the next step is server virtualization.

Server virtualization supports several applications and operating

systems on a single sever by defining multiple virtual machines

(VMs) on the server. Each virtual machine operates like a stand-

alone, physical machine, yet shares the physical server processing

power, ensuring no processing power is wasted. IT departments

can reduce server inventory, better utilize servers, and manage

resources more efficiently.

Server virtualization relies heavily on networking and storage.

Virtual machines grow and require larger amounts of storage than

one physical server can provide. Network attached storage (NAS)

or storage area networks (SANs) provide additional, dedicated

storage for virtual machines. Connectivity between servers and

storage must be fast to avoid bottlenecks. 10GbE provides the

fastest interconnectivity for virtualized environments.

10 Gigabit Ethernet SAN versus Fibre Channel:

simpler and more cost-effective

There are three types of storage in a network: Direct-attached

storage (DAS), NAS, and SAN. Each has its advantages, but SAN is

emerging as the most flexible and scalable solution for data centers

and high-density computing applications. The main drawback to

SAN has been the expense and specially trained staff necessary

for installing and maintaining the Fibre Channel (FC) interconnect

fabric. Nonetheless, SANs with Fibre Channel have become well

established in large enterprises.

A new standard, the Internet Small Computer System Interface

(iSCSI), is making 10 Gigabit Ethernet an attractive, alternative

interconnect fabric for SAN applications. iSCSI is an extension of

the SCSI protocol used for block transfers in most storage devices

and Fibre Channel. The Internet extension defines protocols for

extending block transfers over IP, allowing standard Ethernet

infrastructure to be used as a SAN fabric. Basic iSCSI is supported

in most operating systems today. The latest iSCSI capabilities allow

10 Gigabit Ethernet to compare very favorably to Fibre Channel as

a SAN interconnect fabric:

•Reducedequipmentandmanagementcosts: 10GbE networking

components are less expensive than highly specialized Fibre

Channel components and do not require a specialized skill set

for installation and management

•Enhancedservermanagement: iSCSI remote boot eliminates

booting each server from its own direct-attached disk. Instead,

servers can boot from an operating system image on the SAN.

This is particularly advantageous for using diskless servers in

rack-mount or blade server applications

•Improveddisasterrecovery: all information on a local SAN

— including boot information, operating system images,

applications, and data — can be duplicated on a remote

SAN for quick and complete disaster recovery

•Excellentperformance: even transactional virtual machines, such

as databases, can run over 10 Gigabit Ethernet and iSCSI SAN,

without compromising performance

10 Gigabit Ethernet and the aggregation layer:

reduce bottlenecks

Until recently, network design best practices recommended equipping

the edge with Fast Ethernet (100Base-T), and using Gigabit

uplinks to either the core (for two-tiered network architectures)

or aggregation layer (for three-tiered networks). Today, traffic at

the edge of the network has increased dramatically. Bandwidth-

intensive applications have multiplied, and Gigabit Ethernet to

the desktop has become more popular as its price has decreased.

Broader adoption of Gigabit Ethernet to the desktop has increased

the oversubscription ratios of the rest of the network. The result:

a bottleneck between large amounts of Gigabit traffic at the edge

of the network, and the aggregation layer or core.

10 Gigabit Ethernet allows the aggregation layer to scale to meet

the increasing demands of users and applications. It can help

bring oversubscription ratios back in line with network-design

best practices, and provides some important advantages over

aggregating multiple Gigabit Ethernet links:

•Lessfiberusage: a 10 Gigabit Ethernet link uses fewer strands

compared with Gigabit Ethernet aggregation, which uses one

strand per Gigabit Ethernet link. Using 10 Gigabit Ethernet

reduces cabling complexity and uses existing cabling efficiently

•Greatersupportforlargestreams: traffic over aggregated 1Gigabit

Ethernet links can be limited to 1 Gbps streams because of packet

sequencing requirements on end devices. 10 Gigabit Ethernet

can more effectively support applications that generate multi

Gigabit streams due to the greater capacity in a single 10 Gigabit

Ethernet link

•Longerdeploymentlifetimes: 10 Gigabit Ethernet provides greater

scalability than multiple Gigabit Ethernet links, resulting in a

more future- proof network. Up to eight 10 Gigabit Ethernet links

can be aggregated into a virtual 80-Gbps connection

Three reasons to get started today with NETGEAR M7100 series

Conclusion

For network connectivity, 10GBase-T, like other base-t technologies, uses the standard RJ45 Ethernet jack. This connection form factor is

not only common on switches, but is also normally integrated onto servers, workstations and other PCs. Base-T usually runs up to a 100

meters, on the widely deployed, twisted pair copper cabling, such as Cat 6A type, and now more recently Cat 7 type. It is also backward

compatible, auto-negotiating between higher and lower speeds – thereby not forcing an all at once network equipment upgrade. The

NETGEAR M7100 series is the world-first realistic, cost-effective 10GBase-T departmental solution!

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Netgear XSM7224-100NES Datasheet Page 8

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