Trouble in IP Heaven. Telco Talk IP Destination QOS Class of service Latency Shaped service.

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Presentation transcript:

Trouble in IP Heaven

Telco Talk IP Destination QOS Class of service Latency Shaped service

Carriers Infrastructure Datapac PSTNFrame Relay IP ATM MegaRoute ISDN

Carriers Future Fibre SONET MPLS/IP Voice Video VPNs Managed IP Internet App. Services SONET GE

Class of Service - Examples Class 1 - VoIP - Low latency Class 2 - VPN - Moderate Latency Class 3 - Best effort - DSL

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

Qos Output Buffer Input Buffer Dropped

CRC Errors Failed Checksum Traditional transport Errored info is transferred IP transport Bad data… Tossed out

ITU Y.1541 Bit Error Rate Bit Loss Rate

Jumbo Frames 1500 bits no more Not WAN material Can Be over 65,000 bits MTU

UDP vs. TCP TCP Confirmed data Wait until ACKed UDP No Stop lights Broadcast Mode Inherent Higher Priority

Video Data Mb/s Time

Shaped Service Meter MarkerShaper Input Dropped

Qos Priority 1 2 3

Video Stream UDP

File Transfers

Tools etc…

Thanks

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