Specifications
14 Copyright © 2009, Juniper Networks, Inc.
DESIGN GUIDE - Data Center LAN Connectivity Design Guide
A Network Revolution
Typically over 50 percent of Ethernet switch ports are used for switch-to-switch connectivity in the data center.
High-density switches that eliminate layers reduce server-to-server latency by 50 percent, decrease bandwidth
chokepoints and increase bandwidth capacity by 75 percent, require 50 percent less power with smaller thermal and
physical footprints, increase growth capacity, and also simplify network cabling, topology and device management.
As a recent entrant into the switching market, Juniper Networks has factored lessons learned and other experiences
into the development of a new portfolio of high-density Ethernet switch products and network solution designs
that address contemporary issues and accommodate the future growth of high-performance networks. These new
products are designed to eliminate unnecessary network layers while providing a platform for delivering higher
availability, converged communications, integrated security and higher operational efficiency. With these solutions,
Juniper Networks simultaneously advances the fundamentals and economics of networking by delivering greater
value, increasing simplicity and lowering the total cost of network ownership.
Data Center Access Layer
The access layer provides connectivity to all of shared enterprise servers, applications, storage devices, and any IP
or office automation devices required in the data center facility. Most data center access switches are deployed at
the top of the rack or at the end of the row of server racks, with a minority deployed in the wiring closet of the data
center facility, which supports local connectivity needs.
Figure 5: Access layer of a highly available data center LAN
M Series
MX Series
WX Series/
WXC Series
ISG Series/
IDP Series
WX Series/
WXC Series
ISG Series/
IDP Series
EX8200
line
EX8200 line
EX4200
line
EX4200 line EX4200 line
EX4200
line
EX4200
line
EX4200 line EX4200 line
EX4200
line
EX4200
line
ISG Series
WAN EDGE LAYER
CORE LAYER
AGGREGATION
LAYER
ACCESS LAYER
WAN
M Series
MX Series
ISG Series
PSTN