| |
AT&T
Enhanced Virtual Private Network Services
(MPLS based)
 |
|
Provides
flexibility
and scalability
through MPLS-based
any-to-anyconnectivity; |
|
|
Supports
differentiated
data Class
of Service
with comprehensive
web-based
reporting; |
|
|
24x7 global
operations
and support; |
|
|
Supported
by AT&T’s
MPLS-based
global seamless
network. |
| |
|
AT&T EVPN Services is a global, fully
managed VPN service offered by Shanghai Symphony
Telecom under its UNISITI branded portfolio
of services, to its multinational customers
in China.
AT&T EVPN Services is designed to provide
the flexibility of scalable, any-to-any communications
with the reliability, quality and security
of a Multiprotocl Label Switched (MPLS) based
IP-enabled network, with the following key
features and benefits to the global multinational
customers
|
|
|
Offers essential
VPN solutions
and capabilities
that include
network management,
change and
trouble management
and security
capabili-ties |
|
|
Provides
cost effective,
reliable
and seamless
communication
way that
transcend
national
and geographic
boundaries |
|
|
Offers an
efficient
and scalable
way for businesses
to incorporate
mission critical
applications
into their
existing
networks |
|
|
Solution
is transport
and access
type independent,
thus can
provide worldwide
reach, quality
of service,
traffic engineering
and service
level agreements
(SLA) |
|
|
Capabilities
to link remote
or traveling
employees,
customers
and tra-ding
partners
in almost
any location
around the
globe. |
|
|
Supports
multiple
applications
and can prioritize
delay sensitive
traf-fic
as requested
by users. |
|
|
Reduces
customer
operational
resources
needed to
build and
supp-ort
their global
private network,
thus will
allow them
to focus
on their
core business,
with substantial
savings on
expenses
and capital
o-utlay for
network facilities,
equipment
and systems |
 |
SIMPLICITY
AND SCALABILITY |
| |
|
Today’s
businesses
have a growing
demand for
global managed
network services
that support
multiple
applications.
Businesses
need cost-effective,
reliable
and seamless
communication
way that
transcends
national
and geographic
boundaries.
With the
use of MPLS-based
technology,
AT&T
EVPN services
|
|
|
Enables
the convergence
of real time
and data
applications
onto a single
core network
by defining
bandwidth
and traffic
engineeringrequirements
by type of
application. |
|
|
l Provides
superior
scalability
to implement
or add new
sites easily
without having
to reconfigure
the entire
VPN. |
|
|
Staging
and testing |
|
|
Managed
access connection
(MAC) speeds
up to OC3
(155Mbps)
in US, Canada,
Latin America
and Asia
Pacific and
STM1 (155Mbps)
inEurope |
|
ANY-TO-ANY
CONNECTIVITY |
| |
|
AT&T
EVPN Services
is an IP-enabled,
any-to-any,
application-aware,
managed WAN
service that
delivers
security
capabilities,
flexibility
and performance
levels for
corporate
intranet
solutions
on a global
basis. This
IP-based
VPN service:
|
|
|
Eliminates
the multiple
Permanent
Virtual Circuits
(PVCs) and
tandem routing
that is typically
required
to deploy
a fully meshed
network. |
|
|
Allows you
to connect
your Intranet
VPN via various
transport
optio- ns
(such as
direct connection
to an MPLS
node, Frame
Relay access,
broadband
access or
remote dial
access). |
|
|
Allows the
network to
transmit
data packets,
using standard
IP routing
protocols,
to any location
via a short,
pre-determined
path across
the AT&T
Global Network. |
|
|
Provides
an elegant
and simple
solution
that gives
customers
the best
of both worlds
in global
networking ?the
ubiquitous
access of
IP-based
VPNs and
the security
and reliability
of traditional
private networks |
|
DIFFERENTIATED
CLASSES
OF SERVICE |
| |
|
Quality
of Service
(QoS) allows
applications
and users
to request
and receive
a predictable
level of
service for
each traffic
type. This
feature allows
for predictability,
reliability
and availability
in the network
by keeping
the intelligence
at the network
edges where
most problems
(i.e., congestion)
occur, and
therefore
minimizes
complexity
in the backbone.
Latency and
bandwidth
in the network
is managed
by applying
multiple
QoS technologies
at the customer
site routers,
including:
|
|
|
Classification
based on
application
requirements |
|
|
Traffic
policing
and traffic
shaping |
|
|
Packet queuing
/ class-based
weighted
fair queuing |
|
|
Congestion
mechanisms
(WRED) |
|
|
Classification
of the IP
packets is
achieved
by defining
four Classes
of Service
(CoS), which
are set according
to application
requirements. |
| Traffic
Class |
|
Traffic
Type |
|
Suggested
Examples |
| CoS
1. |
|
Real Time
Applications |
|
Voice and
Video |
| |
|
|
|
|
| CoS
2. |
|
Premium
business
applications |
|
Transactional
applications |
| |
|
|
|
|
| CoS
3. |
|
Critical
business
applications |
|
Database
applications,
commercial business
applications |
| |
|
|
|
|
| CoS
4. |
|
Standard
business
applications |
|
File transfer,
batch, email,web browsing
and database replication |
| |
|
|
|
|
|
|
|
|
|
