Juniper Networks Ethernet Switching For The Enterprise
Igxglobal has embraced the Juniper enterprise vision of consolidating and
simplify the network architecture. This will ensure that modern enterprise
network architectures reduce their total cost of ownership through the
reduction in power, cooling and facility requirements.
For the last 10 years, the dominant vendor of campus switches, has been
selling the same devices and architectures into the Local Area Network
without any real innovation in technology.
The infrastructure LAN is then typically comprised of three tiers,
Advanced features like MPLS and Multicast are either not supported or
perform to the scale required for high performance LAN capability.
Security is an after thought – usually ending up with a band aid approach, with security deployed across the aggregation layer
consuming lots of power and space.
Nearly all current LAN architectures will look something like the variation of this network shown.
Access Switch Distribution Switch Core Router
Normally designed and installed over several years , the multiple tiered network design falls short of delivering the perform-
ance, scalability, and wire speed port density required of today’s converged networks. Multiple tiered designs add consider-
able procurement costs, complexity , and are expensive to run and operate. Within this tiered architecture, normally a differ-
ent operating system also needs to be deployed within each layer.
Juniper EX Series Switch In The Campus
Igxglobal with Juniper Networks EX series switches can deliver next generation
switching technology for today and tomorrow’s campus networks.
The EX series switch can offer carrier grade reliability and performance , whilst
reducing the total cost of ownership (TCO).
The Juniper EX switch within the campus design allows for the high availabil-
ity and carrier class reliability of modular systems to be combined with the
flexibility of virtual platforms.
This combination delivers a high performance, scalable solution for the enter-
prise network, campus, and branch office environments.
With the EX series switch businesses can deploy a cost effective family of
switches that deliver High Availability (HA), Unified Communications, Inte-
grated Security, and operational simplicity.
With Virtual Chassis technology eliminates the problems encountered with current complex enterprise switching networks, by
using high performance application specific ASIC system architecture and JUNOS software.
The EX series switch features Juniper Networks Virtual Chassis technology which enables up to 10 EX4200 switches to be in-
terconnected and operate as a single system. Unlike other vendor systems this 1U high switch can also use its 1Gigabit Ethernet
or 10Gigabit Ethernet fiber uplink ports to interconnect between the Virtual Chassis elements. This enables office buildings to
deploy the EX4200 access switches on multiple floors, and interconnect them too act as one Virtual System.
A virtual chassis gives the reliability, availability, and high port density of traditional modular chassis based systems. With a
Virtual Chassis the enterprise LAN can add switches into the virtual system as the network grows, giving true “Pay as You
The “Pay As You Grow” design of the virtual chassis reduces the overall cost of running the enterprise design. Traditional fixed
chassis designs are expensive to run, they require lots of power and more cooling. The virtual chassis uses less power and less
cooling, due to the fact each switch is only 1U high.
With the addition of switches as you need them , the power and cooling usage is reduced significantly.
EX2200 Ethernet Switch
Available Q1 2010
The EX2200 brings a small factor Layer 2 and
Layer 3 switch with reliability of JUNOS.
Aimed at the entry level access requirement
of the high performance business network.
Four platform configurations are available for the EX2200, offering 24 and 48 port 10/100/1000 BaseT ports, with
Power Over Ethernet optional capability. The 24 and 48 port POE switches support the 802.3af standards, based on
POE on every port supporting network devices such as IP Phones and wireless LAN access points.
The EX2200 is designed for access point connectivity where the use of certain routing protocols are not required,
however the capability of static routing , RIP and full Layer 2 protocol support is necessary.
Four front-panel small form-factor pluggable transceivers (SFP) Gigabit Ethernet uplink ports. These pluggable
optics provide high speed connectivity to aggregation layer switches or other upstream devices.
Fixed, low consumption power supply and fans ensure operational simplicity and a lower OPEX cost.
Integrates with the Juniper Unified Access
Control (UAC) to provide per user access
control and policing.
Support for Layer 2 protocols as well as
RIP and Static Routing is within the Base
Optional Enhanced Feature License for
supporting OSPF and PIM.
Single release train for Juniper Networks
JUNOS software ensures consistent con-
trol plane features, and new feature imple-
Modular JUNOS software prevents a
switch reboot on the event of a system
Managed through a single application ,
Juniper Network and Security Manager (NSM).
EX3200 Series Ethernet Switch
The EX3200 switching platform is a 1RU standalone solution for low
density access deployments. These switches are expected to be deployed
in the wiring closets of branch or remote offices, and large office buildings.
Full Layer-2 and Layer-3 switching functionality is supported,
including OSPF, and RIPv2 in the JUNOS operating system Base
There are four EX3200 switching platforms, encompassing 24 and 48
port 10/100/1000 Base-T ports. These switches can be designated
as partial or full power over Ethernet (POE) capable. POE capability
enables the support of IP enabled devices such as, IP desk
telephones, video cameras and wireless LAN (wLAN) access points.
All POE ports are full 15.4 watt , Class-3 POE ports. This makes the
EX3200 an ideal entry level platform for supporting modern day
The base EX3200 switch , either 24 port or 48 port, comes with the partial eight POE ports as standard.
These POE capable ports are ports numbered 1 through 8 , and are identified by the port number being a
different colour from the remaining standard ports. There are no restrictions on these POE ports.
The switch supports an optional
four port Gigabit Ethernet (Gbe)
or two port 10Gigabit (10Gbe)
uplink modules with pluggable
The fan tray and power supply
are field replaceable (FRU),
replacing the fan tray has no
impact on the POE ports if
activated, for a limited time
As per the carrier class routing
platforms, the EX3200 control
and forwarding planes are
separated and supports the modular JUNOS operating system.
The packet forwarding engine (PFE) has an integrated purpose built ASIC, the EX-PFE enables wire rate
fowarding, even when all control plane features are enabled.
The EX3200 switch uses 190 watts of power for normal switching functionality.
EX4200 Line of Ethernet Switch
With Virtual Chassis Technology
The EX4200 switch with virtual chassis technology, allows for the high availability and carrier class reliability of
modular systems to be combined with the flexibility of stackable platforms.
This combination delivers a high performance, scalable solution for
enterprise network, campus, and branch office environments.
full Layer-2 and Layer-3 switching capabilities, the EX4200 switch
provides a high density access and Gigabit Ethernet (Gbe)
aggregation platform , that meets the requirements of modern high
performance enterprise networks.
The virtual chassis technology enables up to ten switches to be
interconnected and managed as a single device.
With a virtual chassis solution deployed, carrier grade high availability
features can be utilised within the enterprise network.
When two EX4200 switches are interconnected as a virtual chassis, the JUNOS software enables the ability
for the multiple route engines to deliver Graceful Route Engine Switchover (GRES), and Layer-2 non stop
forwarding in the event of the route engine failing.
Graceful Route Engine Switchover allows the virtual chassis to ensure the reliability within the access
switching environment, normally only found in chassis based platforms used for aggregation at the distribution
and core areas of the network.
The switch has optional Gigabit Ethernet (Gbe) and 10Gigabit Ethernet (10Gbe) uplink modules, enabling
high speed connections too aggregation or core switches.
As with the EX3200 , the EX4200 switch has partial or full POE port capability, delivering full 15.4W Class 3
The EX4200 also can be provisioned as a twenty four port 100Base-FX / 1000Base-X SFP modular switch.
EX4200 Access Port POE Height Switch Power
Model Configuration Ports Including POE ports
EX4200-24T 24 10/100/1000 8 1RU 190W + 8 X 15.4W
EX4200-24P 24 10/100/1000 24 1RU 190W + 24 X 15.4W
EX4200-24F 24 100Base-FX / N/A 1RU 190W
EX4200-48T 48 10/100/1000 8 1RU 190W + 8 x 15.4W
EX4200-48P 48 10/100/1000 48 1RU 190W + 48 x 15.4W
EX4200 Virtual Chassis
Virtual Chassis Features:
Two or more (up to 10 ) EX 4200 series switches interconnected
via virtual-chassis backplane cables or extended via GbE and
10GbE uplinks operating as a single Juniper chassis switch
Single management interface, single JUNOS software version,
single copy of configuration, and chassis-like slot/module/port
Simplified Network Design: Single network entity, single control
plane, link aggregation across virtual chassis members.
Superior Resiliency: Redundant master and backup Route
Engines (REs), redundant switch backplane and power/fan
Flexibility to add more virtual chassis elements as port density
grows, add more 10GbE uplinks, mix and match switch types ,
true pay as you grow.
Superior Performance at a lower entry price point with
simplified distributed forwarding switch architecture, and low
128Gbps backplane across 10 x interconnected switches.
Route Engine Switchover:
The virtual chassis elects a master route engine and standby route engine, with all other remaining switches acting
as line cards. If the standby route engine detects a problem with the master route engine, it automatically assumes
the master route engine role. One of the line card switches will assume the standby route engine role ,
ensuring continuos high availability for the virtual chassis.
The physical ports on the failed master route engine switch will remain
active and will continue to forward data, this because the control plane
has moved to the new master route
EX4200 Virtual Chassis
Virtual Chassis With Fibre Uplink Module Connectivity :
Junipers EX4200 Virtual Chassis technology has the ability to use the fiber uplink ports to interconnect the switches within the
Virtual Chassis. This unique feature enables the enterprise network that is spread across multiple floors within an office
environment, to still have the capability of the Virtual Chassis and all the benefits of high availability (HA).
This enables the modern unified network , with VOIP
phones, wireless access, and PC desktops to benefit
from the HA features not normally found within the
access layer of the enterprise network.
Using the EX4200 Virtual Chassis for the unified
network access connectivity removes the need for
complex Layer2 network designs, protocols, and
separate switching layers per user or office floor.
The reduction in the access switching footprint helps
to lower the Total Cost of Ownership (TCO) for the
access network, which will in turn also
reduce the Operational Expenditure (OPEX).
With the combination of partial POE ports and full
POE ports on the individual switch, the EX series
switches can be used to interconnect POE capable
Enabling wireless LAN connections to be powered
directly from the access switch.
To ease deployments for the converged networks
LAN, the EX series switch supports the Link Layer
Discover Protocol (LLDP) and the LLDP Media
Endpoint Discovery Protocol (LLDP-MED). This
enables the EX series switch to automatically detect
Ethernet enabled devices, determine their power
requirements, and assign VLAN parameters.
The EX series switch also fully integrates into the
Juniper Unified Access Control (UAC) solution. This
enables the EX switch to be fully protected , enabling
LAN administrators to consolidate all aspects of a
users identity, device, and location. Enforcing access
and security controls down to the individual port or access user level.
The JUNOS Advantage For Enterprise Switching
EX Switch Architecture Overview:
The EX switch is based on the same architectural principles as the carrier grade routers, all Juniper platforms follow
the same rule of separation for the control and forwarding plane.
This separation of the control and forwarding planes results in the architecture of the platform having two major
components, the Routing Engine (RE) and Packet Forwarding Engine (PFE).
The Routing Engine (RE) is the control plane of the EX switching platform, and is responsible for protocol updates
and system management. This is also where the JUNOS operating system resides. The RE runs various protocols
and system processes that reside inside a protected memory environment. Based on the PowerPC architecture , the
RE maintains the routing table, bridging table and primary forwarding table.
An internal link connects the RE to the Packet Forwarding Engine (PFE), via which the RE pushes a copy of the pri-
mary forwarding table to the PFE, and the PFE sends protocol control packets to the RE. The PFE is responsible for
forwarding transitive packets through the switch. The PFE is implemented using ASIC’s on the EX switching plat-
Separation of the control and forwarding plane ensures superior performance and highly reliable
JUNOS Operating System:
JUNOS OS follows three simple principles,
One operating system
This is called the 3 x 1 principle, and is the underlying foundation of the Juniper operating system and platform
architecture. With this architectural foundation utilised in the EX switch platform, the benefits of a carrier grade
network operating system can be deployed within new high performance enterprise networks.
The JUNOS OS is based on a modular system, This modular approach to the operating system ensures operating
processes are isolated from one another, which allows for further expansion and enhancements to be added into the
JUNOS OS with ease.
Any operating process that maybe encountering some kind of event, due to its isolation from the other operating
processes, does not effect any other running process.
The underlying kernel of the JUNOS OS is FreeBSD, chosen because it is a tried and tested
operating system in its own right, and allowed for the JUNOS operating system to be build
on a rock solid foundation.
The JUNOS Advantage For Enterprise Switching
JUNOS Operating System cont..
The JUNOS operating system code is released quarterly, during the second month of each quarter. Normally the first
version of the new JUNOS operating system will have new features and enhancements. Any release after this , or
version 2 of the main software code release number will be for bug fixes, that are needed within the new software
Forwarding and Control Plane High Level Architecture:
The RE is the control plane, the operational decision making
process is done here for the EX switch. The control plane handles
all switching and routing protocol processes, as well as other
software processes that control the switch’s interfaces, the chassis
components, system management and user CLI access.
The control plane process runs on top of the Junos OS kernel as
the kernel interacts with the PFE over an internal link.
The PFE sends all switching and routing protocol packets from the
network to the RE, in turn the RE sends a copy of the master Bridg-
ing Table and Forwarding Table to the PFE .
The Forwarding Table is made up from the Routing Table (RT)
which is populated by the routing protocols.
With the Routing Engine copying the Bridging Table and
Forwarding Table to the PFE, the PFE never has to consult the RE
for packet forwarding decisions.
This greatly increases the speed of which packets can be handled
and forwarded through the EX switching platform.
About Igxglobal UK
Igxglobal UK Ltd is a highly respected Network Infrastructure and Integration specialist organization. A Juniper Networks Elite
partner within the UK, with extensive Enterprise and Service Provider network deployment, design, and support experience.
With its varied vendor partners, igxglobal UK Ltd looks towards next generation design innovation. Embracing low latency next
generation design methodology and concepts for Enterprise, Service Provider, and Media organizations.
A specialist security company , igxglobal UK Ltd has extensive experience in firewall migration methodology, PCI-DSS audit,
UAC, IDP, and other security enhancing technologies.
Igxglobal UK Ltd
33 Throgmorton Street
Email : EMEA-Sales@igxglobal.com
Telephone : +44 (0) 207 156 5064