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packet flows.
Depending on the type of network,
there are a number of critical network
segments where strategically deployed
instrumentation will provide essential
visibility. Fixed line operators
with IP MPLS or metro Ethernet networks
will find they need to instrument
critical OC-12/OC-48 POS, Gigabit
Ethernet, or 10 Gigabit Ethernet segments
across the backbone. Mobile operators
with GSM/UMTS or CDMA2000 may find
they need to instrument Gn or A10/A11
interfaces, Gi or Pi interfaces,
interfaces to roaming partners, or
ATM / MPLS VRF segments in the backbone
to achieve visibility.
With instrumentation in place,
service providers can use the information
for evaluating the performance of
AAA services, VoIP calls, internet
services, and even networking activities
that are often unknown to subscribers
but affect their quality of experience
(QoE), such as DNS or DHCP. Visibility
into the KPIs, service flows, and
packets enables service providers
to reduce MTTR and improve network
and service assurance with advanced
customer/service-aware performance
monitoring. The following examples
illustrate the importance of visibility.
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It
is easy to see the opportunity to
increase market share and revenue
from fast-rising demand for XoIP
services for providers around the
world.
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for troubleshooting
degradations, traffic
engineering, and/or
capacity planning purposes.
The analysis of the
AAA traffic flows can
reveal:
- Total AAA traffic
volume in bytes or
packets in real-time
and over time to
pinpoint peak activity
times of the day
- Utilization for
specific AAA servers
to verify and validate
load balancing is
performing as designed
- Response times
for specific services
with proactive alarms
to alert when expected
performance levels
are degrading
Internet Services
Web-based services
(SOA applications)
have become increasingly
more popular for
enterprises to develop
and host for
customers, partners, and employees.
Internet-based services for downloading
content, whether it be the latest
YouTube phenomena, requests for stock
trades,
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AAA Services
AAA (authentication, authorization
and accounting) systems in service
provider IP-based networks control
what resources individual customers
or subscribers have access to
while simultaneously maintaining
their activity over the network
for billing purposes. If the
AAA system, such as RADIUS or
TACACS, is not performing as
required, subscribers may not
be able to gain access to services
and the result will often be
a direct loss of revenue or at
least a loss of subscriber confidence.
A performance monitoring solution
can gather and analyze the efficiency
and behavior of AAA services and
provide refined graphs, reports,
and tables that can be used
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streaming Internet radio,
or streaming sporting events, has
created a unique set of opportunities
and challenges for service providers.
Poor QoE of internet services for
subscribers can be an immediate and
primary cause of customer churn.
From a service assurance perspective,
the internet has a substantial volume
of conversation traffic that represents
high value services to an operator,
making it an essential area of the
network to establish performance
monitoring and visibility.
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