Transcript Geen diatitel

The importance of
SMC Service Management Center
and
Quality of Service for
management of commercial networks
Actual Situation
Current Place of SMC in Narrowband WA Network (1/2)
ISP
SMC
ER
RAN
Corp
LAN
RAN
Individual
users
Current Place of SMC in Narrowband WA Network (2/2)
Remote
user
ISP
PROXY
IAP
Proxy SMC
SMC
RAN
ER
RAN
Corp
LAN
RAN
RAN
Individual
users
Alcatel Narrowband Enhancement (1/2)
SMC A1135
User authentification: name, password
proxy
supported
Cost &
performance
efficiency
User authorisation: access restrictions
User accounting: billing time/volume/speed
VPN based concentration
Session handling
Network adaptation
(Remote) user
SMC
RAN
Alcatels Narrowband Enhancement
DANA
ADSL
(2/2)
Broadband PPP/ATM RAN architecture
BOOSTING the network: speed x 50
Using the POTS hard shoulder: Frequency modulation
Simple Plug-and-Play (Light ADSL)
Based on ATM
Universal Single Standard
Actual Problems
Actual Narrowband Service configuration
Applications
Video conf.
Crit. data
256 - 384 Kb 768Kb - 1.5 MB
256 - 384 Kb 768Kb - 1.5 MB
256 - 384 Kb 768Kb - 1.5 MB
256 - 384 Kb 768Kb - 1.5 MB
Telephony
ISP 1
ISP n
Corp 1
Data
Corp n
Service Level Standard
Customers
Bronze
Silver
Gold
Actual Narrowband Problems
POTS: Plain Old Telephone Service
Direct Client-PABX link: 100% reservated
but...<<100% use
PSTN 64Kps available limit, Mps need: overload
Merely no differentiated customer groups,
no differentiated services
no differentiated billing
Hugh cost/performance ratio
Protocol conversions, large overhead
New Trends
1997: Evolution of Wide Area Networks
Time evolution
Frame Relay/ATM
Leased Line
Public
ISP
Virtual network
Key Trends
Historical
future
• Traffic patterns: predictable
chaotic
• WAN boundaries:separate
integrated
• mission critical: separate
integrated
• data volume:
defined
exponential
• requirement:
data
information
Key Necessities
• increased bandwith
• extended reach
• enhanced ‘smart’ applications
• controlled behavior
New Evolutions
1. Development of WAN access is
more customer satisfaction
orientated
Customer Satisfactory of WAN: actual requirements
Customer Satisfaction WAN (source: Newbridge)
voice/data integration
degree of outsourcing
geographic availability
speed of provisioning
simplified tariffs
clarity of billing
cost/performance
seamless integration
ease of use
speed/bandwith
reliability
customer service
0
1
2
3
satisfaction
4
5
importancy
6
7
Customer Satisfactory WAN: actual requirements
120
Present Value of improvement
100
80
60
40
20
0
0
1
2
3
4
-20
-40
-60
Customer Stress
5
6
7
reliability
customer service
speed/bandwith
ease of use
cost/performance
seamless integration
clarity of billing
speed of provisioning
simplified tariffs
geographic availability
degree of outsourcing
voice/data integration
2. Integration of legacy networks
Actual separated Users
SAP, BAAN
Database
Surfing
Future mixed (?) Users
$
SAP, BAAN
Database
@
Surfing
New apps impact mission-critical apps
3. Bandwith policies
Bandwith policy by creating application profiles
Based on
Packet loss
round trip delay
troughput
packet jitter
one-way delay
reachability
networdk service availability
duration of outage
lenght of outages
Source: Framework for metrics for SLA
Internet surfing application profile
packet loss
10
9
8
packet jitter
7
6
secure data transfer
5
4
3
2
1
0
throughput
round trip delay
network outage
reachability
SAP application profile
packet loss
10
9
8
packet jitter
7
6
secure data transfer
5
4
3
2
1
0
throughput
round trip delay
network outage
reachability
Banking application profiles
packet loss
10
9
8
packet jitter
7
6
secure data transfer
5
4
3
2
1
0
throughput
round trip delay
network outage
reachability
Applicability of VPN’s
Every cube will be a VPN
Applications
Video conf.
Crit. data
Customers
Telephony
ISP 1
ISP n
Corp 1
Data
Corp n
Service Level Standard
Bronze
Silver
Gold
Applicability of VPN: policy enabled net
Is this user authorized
to run this application?
What level of
performance
is needed to
do the job?
What priority should
this application/user
receive?
4. L2 versus L3 solutions
1. Switching <> Routing: advantages and disadvantages.
Is the world willing to adapt :
Benefits > development cost and investments ?
Is the world able to adapt:
Backbone support ?
2. IP and ATM:
IP over ATM
IP packet
Packet switching => no quality control
Cell switching: Priority indication
ATM
Actual Discussion
Quality-driven
Connection oriented
switching
Bandwith-driven
Connectionless
routing
Semi-Connection oriented
routing
Actual Challenges
Actual Challenges
1. Integration of legacy networks, creation of Intelligent
Global Infonet
Switched circuit
networks
Gateway
IP
Networks
ATM/BB/SCL/IP
Network
Gateway