This lesson explains IP Precedence, DSCP (Differentiated Services), codepoints, TOS byte, DS field, CS,AF and EF.

Table 6-1 lists the commonly used DSCP values described in RFC 2475. Table 6-2 lists the RFC 791 precedence values from least to most important. Flash - mainly used for Voice Signaling or for Video. Critical -mainly used for Voice RTP.

DiffServ uses a 6-bit differentiated services code point (DSCP) in the 6-bit differentiated services field (DS field) in the IP header for packet classification purposes. The DS field, together with the ECN field, replaces the outdated IPv4 TOS field.

Apr 24, 2012 · Differentiated Services Code Point (DSCP) The definition of ToS was changed entirely in RFC 2474, and it is now called Differentiated Service (DS). On the eight fields, the upper six bit contain value called Differentiated Services Code Point (DSCP).

DSCP values can be used to provide different levels of service to network traffic. TOS (Type of Service): Originally defined in the IP header to specify the priority and request a route for high throughput, low delay, and high reliability. It has evolved over time and is …

Aug 3, 2016 · The main difference between DSCP and IPP in functionality is not the layer, it is the way the traffic is queued. IPP gives you 7 levels, and the switch uses simple QoS Queue management to put them into queues based on that level.

Sep 5, 2024 · This document describes how to set the Differentiated Services Code Point (DSCP) values in Quality of Service (QoS) configurations on a Cisco router.

Differentiated Services Code Point (DSCP) is a means of classifying and managing network traffic and of providing quality of service (QoS) in modern Layer 3 IP networks. It uses the 6-bit Differentiated Services (DS) field in the IP header for the purpose of packet classification.

The first 3 bits of the ToS field is the IP Precedence (IPP), which is used for marking. The remaining bits are unused. The IPP values are 0 to 7, enabling the network traffic to be partitioned into a maximum of six traffic classes of service.

Jul 18, 2019 · The main difference between IP precedence and DSCP is that IP precedence is a 3-bit field in TOC to give priorities to the IP packets, while DSCP is 6 bits in Differential Services (DS) field for packet classification.