Interesting People mailing list archives
more on Query on 'net neutrality' and IPv6
From: David Farber <dave () farber net>
Date: Wed, 31 May 2006 18:22:24 -0400
Begin forwarded message: From: bensons () neohaven net Date: May 31, 2006 2:59:04 PM EDT To: dave () farber net, dylan () tweney com Subject: Re: [IP] Query on 'net neutrality' and IPv6 Dave & Dylan-The QoS mechanism in IPv6 is essentially the same as the QoS mechanism in
IPv4. Although the format of v4 and v6 headers are different, the IPv4 Type of Service and IPv6 Traffic Class are both fields that contain aDifferentiated Services Codepoint. That Codepoint can be used by a network
to decide what Per Hop Behavior each router should apply to the packet. I.e. a packet can be marked with the highest priority Codepoint, and anaccommodating Behavior might be to forward that packet even at the expense of queueing (and thus delaying) other packets. This method is referred to
as Differentiated Services, of DiffServ. It should be noted that there are additionally other ways that a network service provider can enhance the treatment of a particular class oftraffic. In addition to DiffServ there is a method referred to as IntServ which actively reserves network resources (capacity) for a specific flow.
There are other lower-layer mechanisms enabled by MPLS, ATM, and otherlink-layer and shim protocols. Service Providers can use a combination of any or all of these mechanisms to engineer network traffic so that certain services, users, and applications are provided better service than others.
Ultimately it is this Traffic Engineering that allows a service provider to make Service Level guarantees to their customers. It seems to me that the Net Neutrality argument is often confused by a lack of technical understanding. But if it were properly focused it shouldn't be a question about network protocols, but rather about who is allowed to control those protocols: the individual and enterprise users, versus the service providers. Cheers, -Benson
Begin forwarded message: From: d f tweney <dylan () tweney com> Date: May 31, 2006 4:26:34 PM EDT To: David Farber <dave () farber net> Subject: Query on 'net neutrality' and IPv6 Dave-- A question for the IP community: I'm no expert on Internet Protocol, but I do know that IPv6 includes Quality of Service provisions that let routers prioritize some packets relative to others, in order to ensure speedier delivery of, say VoIP or video packets. Presumably, you could also use QoS to prioritize packets from ISP A so they get through sooner than those from ISP B. Isn't that exactly what all the "net neutrality" folks are getting so upset about? And if so, why aren't they protesting IPv6? -- Dylan Tweney writer/editor www.tweney.com dylan () tweney com ------------------------------------- You are subscribed as bensons () neohaven net To manage your subscription, go to http://v2.listbox.com/member/?listname=ip Archives at: http://www.interesting-people.org/archives/interesting-people/
------------------------------------- You are subscribed as lists-ip () insecure org To manage your subscription, go to http://v2.listbox.com/member/?listname=ip Archives at: http://www.interesting-people.org/archives/interesting-people/
Current thread:
- more on Query on 'net neutrality' and IPv6 David Farber (May 31)