Is IP Going To Take Over The World: Offense Isaac Chung Gary Bramwell

Claim: IP does not dominate global communications VOIP Commercially available from Vonage, Skype, Comcast, etc. Video On Demand and IPTV Streaming Video Circuit switching is still big and established, but IP is rapidly gaining

Claim: IP is not more efficient Argues bandwith utilization in core network is lower Actually provides less delay for end users Response time is same for crowded flows IP lets at least some traffic through, circuit lets none

Claim: IP is not more robust IP is a best-effort service Upper layer protocols like TCP deal with this fact Transparent to application layer

Claim: IP is not simpler So? Increased diversity of clients and sources requires complexity to handle Trades complexity for flexibility

Claim: IP cannot support real-time applications “There is a widely-held assumption that IP network can support telephony and other real-time applications” An assumption made true VOIP IPTV Streaming media/Webcasting “It is doubtful a new solution…an displace the reliable and high quality of service (QoS) provided by today’s TDM-based infrastructre. True, but it has no need to replace it to support real-time apps

IP and Circuits living together…mass hysteria! Argues that IP could be used on the fringes of network with a circuit-switched core Don’t support claims that IP isn’t good at traffic isolation, traffic engineering, fault isolation, and manageability

Circuit switching has to manually scale to match IP “Similarly circuit switching has to respond to the increases in traffic of packet switching, by adapting its capacity along core/edge gateways accordingly” This won’t work because…

…Things scale too quickly to manually adapt Thanks to Geoff Huston. on April 1, 2007

Conclusion Paper argues against the plausibility of services that are already in place Claims were based on comparing an established system with a still-new Internet Paper had no actual conclusion or point