trouble in ip heaven. telco talk ip destination qos class of service latency shaped service
TRANSCRIPT
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Trouble in IP Heaven
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Telco Talk IP Destination QOS Class of service Latency “Shaped” service
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Carriers Infrastructure
Datapac
PSTN Frame Relay
IP
ATM
MegaRoute
ISDN
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Carrier’s Future
Fibre
SONET
MPLS/IP
Voic
e
Vid
eo
VPN
s
Man
ag
ed
IP
Inte
rnet
Ap
p.
Serv
ices
SONETGE
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Class of Service - Examples
Class 1 - VoIP - Low latency Class 2 - VPN - Moderate
Latency Class 3 - Best effort - DSL
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VoIP and VOIP Voice over IP
Low data rate Can Miss info Low latency
Video over IP High data rate Needs 10 –10 BER Latency depends
on application
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Qos
Output Buffer
Input BufferDropped
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CRC Errors Failed Checksum
Traditional transport Errored info is transferred
IP transport Bad data… Tossed out
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ITU Y.1541
Bit Error Rate
Bit Loss Rate
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Jumbo Frames 1500 bits no more Not WAN material Can Be over 65,000 bits
MTU
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UDP vs. TCP TCP
Confirmed data Wait until ACKed
UDP No “Stop lights” Broadcast Mode Inherent Higher Priority
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Video Data
Mb/s
Time
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“Shaped” Service
Meter
Marker Shaper
Input
Dropped
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Qos
Priority
1
2
3
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Video Stream
12364758
UDP
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File Transfers
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Tools etc…
Ethereal.exe
TCPOptimizer.exe
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Thanks