Juniper T4000 Datasheet page 2

Architecture and Key Components
The core network is the heart of any next-generation network or
multiplay deployment. With the growth of distributed content
in metro networks, and emerging video, social networking, and
mobile applications, the core network must deliver high-speed
transport at five 9s reliability, and, at the same time, provide rich
service delivery features. The T4000 system offers providers the
premier core routing option in the industry—an ultra high capacity
core with the ability to support hardware virtualization. Juniper
Networks Junos operating system functionality offers the most
®
resilient, high-performance, and flexible applications for backbone
carriage of content-intensive consumer and business traffic.
High Availability
The T Series architecture allows all Junos OS features and
services to operate across many interface types without
compromising performance. From its inception, Junos OS was
T640 or T1600
2
Four easy steps to perform a
service hardware upgrade:
1. Upgrade Power Entry
Modules (PEMs)
2. Upgrade Switch Interface
Boards (SIBs)
3. Fix new face panel
4. Upgrade fan
Figure 1: In-service hardware upgrade of T640 or T1600 to T4000 in four easy steps
developed for rigorous service provider needs. For example,
Junos OS is completely modular so that in the unlikely event
one module experiences a problem, it is isolated to that specific
section of code and does not bring down an entire system. On the
hardware side, all major components—including Routing Engines,
Control Boards (CBs), Switch Interface Boards (SIBs), and Power
Equipment Modules (PEMs)—are redundant.
In-Service Hardware Upgrade
One of the key architectural choices in the T Series family of
routers is the nondisruptive hardware upgrade. Juniper provides
unique capabilities for upgrading existing T640 and T1600
routers to T4000 routers. Following such an upgrade, the T4000
provides more than double the capacity of T1600, while only using
about 25% more power. The steps highlighting such an upgrade
procedure are shown in Figure 1 below.
T4000