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Published byNicholas Robertson
Modified over 3 years ago
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
Company LOGO Virtual Master Control.
Streaming Video over the Internet 1. Characteristics of Multimedia Data Voluminous they demand very high data rates, possibly dozens or hundreds of Mbps.
Lawrence G. Roberts CEO Anagran September 2005 Advances Toward Economic and Efficient Terabit LANs and WANs.
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