Diffserv


Also found in: Acronyms, Wikipedia.

Diffserv

(DIFFerentiated SERVices) A method for adding quality of service (QoS) to IP networks from the IETF. Operating at layer 3 only, Diffserv uses the IP type of service (TOS) field as the Diffserv byte (DS byte). Diffserv does not provide traffic engineering or hard quality of service similar to ATM. When MPLS is deployed within the network, Diffserv can be used at the edge for classification and assignment to the right connection. See MPLS.
Mentioned in ?
References in periodicals archive ?
MPLS and DiffServ are key technologies that can--and will--extend and enhance the value of IP networks with respect to supporting all forms of service traffic across a variable-length packet backbone.
The first of these aims to study the limit behavior of the DiffServ approach put forward by the IETF, which is based on the static dimensioning of network resources.
The second area seeks to enhance the DiffServ approach by studying signaling protocols that enable resources to be managed with much greater precision in order to guarantee a constant level of quality of service when the network has just about reached its limit and optimize the use of resources.
1p delivers a simple-but-effective prioritization scheme; in the wide area network, the IETF's DiffServ standard does the same.
Policy-Based QoS extended to DiffServ (IP TOS): As service providers look to provide additional value-add services beyond scaled provisioning, the ability to re-sell differentiated access and manage bandwidth resources will become key.
While standards, such as DiffServ and MPLS, are important to simplifying the definition and delivery of QoS across the Internet, they must be combined with a solid understanding of how best to trade among cost, performance, and quality-of-service requirements.
For end users, the addition of new quality of service features such as Wi-Fi Multimedia (WMM) in the wireless version of the product and support for Diffserv (differentiated services) for IP allow the unit to automatically optimize and prioritize real-time applications like voice and video.
It also demonstrates the potential of the emerging IETF DiffServ standard to deliver simple, scalable and easily deployable IP QoS solutions for network providers.
Advanced IP Networks" describes the techniques such as RSVP, Diffserv and MPLS that are used to offer a differentiated quality of service over an IP network.
New and current real-world examples, including DiffServ routers in the Internet and cellular mobile networks With the rapidly growing complexity of computer and communication systems, the need for this text, which expertly mixes theory and practice, is tremendous.
It can deliver a wide range of functionality, with support for VLAN stacking, MPLS/VPLS, and IPv4/IPv6 routing coupled with advanced QoS, including DiffServ and IntServ.
1 p/q) and Differentiated Services for Layer 3 (or Diffserv, as defined by RFCs 2474 and 2475) mappings and queues, establishes trust on trunk port interfaces, and defines service priority on egress port interfaces.