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

This section provides the DSCP and precedence values used in QoS class maps and policy maps. Unless noted as a restriction, you can mark both incoming and outgoing packets. 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.

Internet Protocol network packets can have one byte in the IP header defining what kind of service (and priority) the packet contains. The same one byte is used for both Type of Service (ToS) classifications and differentiated services code point (DSCP) values.

2024年2月1日 · What is a Differentiated Services Code Point? DSCP is a field in the IP header used for QoS to prioritize and manage network traffic. It assigns a 6-bit value to packets, allowing for the classification of different types of traffic based on their importance or service requirements.

2023年10月11日 · Differentiated Services (DiffServ) is defined as a class of service (COS) model that is used to describe and control the IP network traffic by class. The main aim of differentiated services is to give priority to the specific traffic that needs an uninterrupted flow of data.

TOS is found in the header of an IP packet (layer 3) and COS is found in the header of 802.1Q (layer 2) and is used for Quality of Service on layer 2 switching. DSCP (Differentiated Services Code Point): This is part of the IP header and uses 6 bits to classify traffic.

2024年9月5日 · Learn more about how Cisco is using Inclusive Language. This document describes how to set the Differentiated Services Code Point (DSCP) values in Quality of Service (QoS) configurations on a Cisco router. You must be familiar with the fields in the IP header and Cisco IOS ® CLI.

This document concentrates on the forwarding path component. In the packet forwarding path, differentiated services are realized by mapping the codepoint contained in a field in the IP packet header to a particular forwarding treatment, or per-hop behavior (PHB), at …

2024年11月15日 · The Differentiated Services (Diffserv) architecture specifies use of the DS field in the IPv4 and IPv6 packet headers to carry one of 64 distict differentiated services field codepoint (DSCP) values.

2020年4月16日 · FortiGate Differentiated Services feature can be used to change the DSCP (Differentiated Services Code Point) value for all packets accepted by a policy. The network can use these DSCP values to classify, mark, shape, and …