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

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Presentation on theme: "Trouble in IP Heaven. Telco Talk IP Destination QOS Class of service Latency Shaped service."— Presentation transcript:

1 Trouble in IP Heaven

2 Telco Talk IP Destination QOS Class of service Latency Shaped service

3 Carriers Infrastructure Datapac PSTNFrame Relay IP ATM MegaRoute ISDN

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

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

6 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

7 Qos Output Buffer Input Buffer Dropped

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

9 ITU Y.1541 Bit Error Rate Bit Loss Rate

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

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

12 Video Data Mb/s Time

13 Shaped Service Meter MarkerShaper Input Dropped

14 Qos Priority 1 2 3

15 Video Stream UDP

16 File Transfers

17 Tools etc…

18 Thanks


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