Juniper J-Series
Encyclopedia
Juniper
J-Series is a series of enterprise routers designed and manufactured by Juniper Networks
. They are modular routers for enterprises running desktop
s, servers
, VoIP, CRM
/ ERP
/ SCM applications. The J Series routers are typically deployed at remote offices or branch locations. These Services routers include the J2320 and J2350 for smaller offices, the J4350 for medium-size branches, and the J6350 for large branches or regional offices.
connectivity as well as specialized Cavium
security processors. From the software perspective, J-series runs JUNOS with a real-time extensions for the forwarding plane function. This unique architecture allows J-series to avoid the "resource starvation" problem commonly seen on legacy software forwarding platforms.
, JUNOS
. These routers have 4 on-board GigE ports and expandable WAN
and LAN
interfaces via pluggable modules. They have a wide range of interfaces supporting Serial, T1/E1, FE, DS3/E3, ISDN, ADSL2/2+, G.SHDSL and Gigabit Ethernet and a wide array of Layer 2 access protocols including Frame Relay
, Ethernet
and Point-to-Point Protocol
(PPP)/HDLC. Other features includes Network Address Translation
(NAT), and J-Flow accounting and advanced services such as IPv6
, MPLS
, Stateful firewall
, Quality of Service
, multicast
, VPN, security services and IPSec
. Juniper partnered with Avaya
to deliver packet voice functionality.
J-Series routers directly benefit from modular and fault-protected software design of the JUNOS
operating system. Unlike traditional enterprise routers, each software module in the JUNOS operating system runs independently and therefore cannot impact other processes. The unique, generalized JUNOS architecture provides complete separation of the routing
and packet forwarding engines in platforms with both hardware and software forwarding planes.
Even under DDoS attack, J-Series routers retain complete control over system operation, allowing console-connected operator to add new filters and policies in order to mitigate the threat. Parts of J-series technology were later reused in SRX series products.
Juniper Networks
Juniper Networks is an information technology and computer networking products multinational company, founded in 1996. It is head quartered in Sunnyvale, California, USA. The company designs and sells high-performance Internet Protocol network products and services...
J-Series is a series of enterprise routers designed and manufactured by Juniper Networks
Juniper Networks
Juniper Networks is an information technology and computer networking products multinational company, founded in 1996. It is head quartered in Sunnyvale, California, USA. The company designs and sells high-performance Internet Protocol network products and services...
. They are modular routers for enterprises running desktop
Desktop computer
A desktop computer is a personal computer in a form intended for regular use at a single location, as opposed to a mobile laptop or portable computer. Early desktop computers are designed to lay flat on the desk, while modern towers stand upright...
s, servers
Server (computing)
In the context of client-server architecture, a server is a computer program running to serve the requests of other programs, the "clients". Thus, the "server" performs some computational task on behalf of "clients"...
, VoIP, CRM
Customer relationship management
Customer relationship management is a widely implemented strategy for managing a company’s interactions with customers, clients and sales prospects. It involves using technology to organize, automate, and synchronize business processes—principally sales activities, but also those for marketing,...
/ ERP
Enterprise resource planning
Enterprise resource planning systems integrate internal and external management information across an entire organization, embracing finance/accounting, manufacturing, sales and service, customer relationship management, etc. ERP systems automate this activity with an integrated software application...
/ SCM applications. The J Series routers are typically deployed at remote offices or branch locations. These Services routers include the J2320 and J2350 for smaller offices, the J4350 for medium-size branches, and the J6350 for large branches or regional offices.
Platform development history
Juniper began working on J-Series in the middle of telecom downturn (2002), while looking for ways to extend its product portfolio. The main idea behind the new product line was to create the cost-optimized routing system that could utilize increasingly powerful general-purpose CPUs and operate under fully-fledged, multi-threaded OS. This was a major departure from "traditional" branch router design, which dictated the use of low-end RISC CPUs working under simplified operating system with marginal multitasking and memory protection capabilities. The first iteration of J-Series design was based on high-end Intel CPUs and featured Intel IXP-based interface cards running over PCI bus. Later models added PCI ExpressPCI Express
PCI Express , officially abbreviated as PCIe, is a computer expansion card standard designed to replace the older PCI, PCI-X, and AGP bus standards...
connectivity as well as specialized Cavium
Cavium Networks
Cavium is a San Jose, California-based company specializing in ARM-based and MIPS-based network, video and security processors. Cavium offers processor and board level products targeting routers, switches, appliances, storage and servers.-Major acquisitions::...
security processors. From the software perspective, J-series runs JUNOS with a real-time extensions for the forwarding plane function. This unique architecture allows J-series to avoid the "resource starvation" problem commonly seen on legacy software forwarding platforms.
Models and platforms
The J-series of routers includes the models such as J2320, J2350, J4350 and J6350. The initial models were J2300, J4300 and J6300 routers.J2320
The J2320 routers are entry level service routers which gives up to 600 Mbit/s throughput performance, has four built-in Gigabit Ethernet ports.It has three PIM slots for additional LAN/WAN connectivity, Avaya VoIP Gateway, and WAN acceleration. They are used for one or two broadband, T1, or E1 interfaces with integrated services.J2350
The J2350 router which has 4built-in Gigabit Ethernet ports , gives up to 700 Mbit/s performance.It gives five PIM slots. They are usually used for multiple broadband, T1, or E1 interfaces with multiple integrated services.J4350
The J4350 enterprise router gives up to 1 Gbit/s in performance. They are usually used for DS3, E3, and Metro Ethernet interfaces with integrated services. It has six PIM slots. Two of these slots are enhanced-performance slots that provide additional performance to multiple Gigabit Ethernet configurations.J6350
The J6350 gives up to 2 Gbit/s in performance. It has six PIM slots for additional LAN/WAN connectivity, Avaya VoIP Gateway, and WAN acceleration. These routers have optional redundant power supplies for high system availability.Features
The J-series routers run on Juniper's network operating systemNetwork operating system
A networking operating system , also referred to as the Dialoguer, is the software that runs on a server and enables the server to manage data, users, groups, security, applications, and other networking functions...
, JUNOS
JUNOS
Juniper Junos is the software or the network operating system used in Juniper Networks hardware systems. It is an operating system that is used in Juniper's routing, switching and security devices. Juniper offers a Software Development Kit to partners and customers to allow additional customization...
. These routers have 4 on-board GigE ports and expandable WAN
WAN
WAN may refer to:* Wide area network * World Association of Newspapers* Wanborough railway station in England, which has the station code WAN...
and LAN
Län
Län and lääni refer to the administrative divisions used in Sweden and previously in Finland. The provinces of Finland were abolished on January 1, 2010....
interfaces via pluggable modules. They have a wide range of interfaces supporting Serial, T1/E1, FE, DS3/E3, ISDN, ADSL2/2+, G.SHDSL and Gigabit Ethernet and a wide array of Layer 2 access protocols including Frame Relay
Frame relay
Frame Relay is a standardized wide area network technology that specifies the physical and logical link layers of digital telecommunications channels using a packet switching methodology...
, Ethernet
Ethernet
Ethernet is a family of computer networking technologies for local area networks commercially introduced in 1980. Standardized in IEEE 802.3, Ethernet has largely replaced competing wired LAN technologies....
and Point-to-Point Protocol
Point-to-Point Protocol
In networking, the Point-to-Point Protocol is a data link protocol commonly used in establishing a direct connection between two networking nodes...
(PPP)/HDLC. Other features includes Network Address Translation
Network address translation
In computer networking, network address translation is the process of modifying IP address information in IP packet headers while in transit across a traffic routing device....
(NAT), and J-Flow accounting and advanced services such as IPv6
IPv6
Internet Protocol version 6 is a version of the Internet Protocol . It is designed to succeed the Internet Protocol version 4...
, MPLS
Mpls
MPLS or Mpls can refer to:* Minneapolis, Minnesota, United States* Multiprotocol Label Switching, a data-carrying mechanism in computer networking...
, Stateful firewall
Stateful firewall
In computing, a stateful firewall is a firewall that keeps track of the state of network connections traveling across it. The firewall is programmed to distinguish legitimate packets for different types of connections...
, Quality of Service
Quality of service
The quality of service refers to several related aspects of telephony and computer networks that allow the transport of traffic with special requirements...
, multicast
Multicast
In computer networking, multicast is the delivery of a message or information to a group of destination computers simultaneously in a single transmission from the source creating copies automatically in other network elements, such as routers, only when the topology of the network requires...
, VPN, security services and IPSec
IPsec
Internet Protocol Security is a protocol suite for securing Internet Protocol communications by authenticating and encrypting each IP packet of a communication session...
. Juniper partnered with Avaya
Avaya
Avaya Inc. is a privately held computer networking, information technology and telecommunications company that is a global provider of business communications systems. The international head quarters is in Basking Ridge, New Jersey, United States...
to deliver packet voice functionality.
J-Series routers directly benefit from modular and fault-protected software design of the JUNOS
JUNOS
Juniper Junos is the software or the network operating system used in Juniper Networks hardware systems. It is an operating system that is used in Juniper's routing, switching and security devices. Juniper offers a Software Development Kit to partners and customers to allow additional customization...
operating system. Unlike traditional enterprise routers, each software module in the JUNOS operating system runs independently and therefore cannot impact other processes. The unique, generalized JUNOS architecture provides complete separation of the routing
Routing
Routing is the process of selecting paths in a network along which to send network traffic. Routing is performed for many kinds of networks, including the telephone network , electronic data networks , and transportation networks...
and packet forwarding engines in platforms with both hardware and software forwarding planes.
Even under DDoS attack, J-Series routers retain complete control over system operation, allowing console-connected operator to add new filters and policies in order to mitigate the threat. Parts of J-series technology were later reused in SRX series products.