The device sends the packets without any assurance of reliability, delay bounds, or throughput. Without QoS, the device offers best-effort service for each packet, regardless of the packet contents or size. Upstream (direction towards the device) is the same as ingress.ĭownstream (direction from the device) is the same as egress.īy configuring the quality of service (QoS), you can provide preferential treatment to specific types of traffic at the expense The following terms are used interchangeably in this QoS configuration guide: #Adobe connect download error could not download payload code#Trust- Trust enables traffic to pass through the device, and the Differentiated Services Code Point (DSCP), precedence, orĬoS values coming in from the end points are retained in the absence of any explicit policy configuration. Traffic is then scheduled or sent out through the port.īandwidth-Bandwidth allocation determines the available capacity for traffic that is subject to QoS policies. Traffic is sent to specific queues for servicing and scheduling based Queuing - Queuing is used to prevent traffic congestion. Then a specific action is taken as soon as the event occurs. Policing is used to impose a maximum rate on a traffic class. Sent from a physical or logical interface. Shaping in the most common form is used to limit the traffic Shaping and policing- Shaping is the process of imposing a maximum rate of traffic, while regulating the traffic rate in suchĪ way that downstream devices are not subjected to congestion. This can be accomplished directly using the set command or through a table map, which takes input values and translates them directly to values on output. When traffic is marked, QoS operations on that traffic canīe applied. To carry information from one interface in a device to another. Marking and mutation- Marking is used on traffic to convey specific information to a downstream device in the network, or Lists (ACLs), Differentiated Services Code Point (DSCP), Class of Service (CoS), and other factors. Quality of service (QoS) consists of the following key components:Ĭlassification- Classification is the process of distinguishing one type of traffic from another based upon access control Location of congestion points in the network. For example, is the traffic on your network bursty? Do you need to reserveīandwidth requirements and speed of the network. Traffic characteristics and needs of your network. The types of applications used and the traffic patterns on your network. Example: Table Map Configuration to Retain CoS Markingsīefore configuring standard QoS, you must have a thorough understanding of these items:.Examples: Table Map Marking Configuration.Examples: Dual-Rate Three-Color Policing Configuration.Examples: Single-Rate Two-Color Policing Configuration.Examples: Policing Action Configuration.Examples: Average Rate Shaping Configuration.Examples: Classification for Voice and Video.Examples: Hierarchical Policy Configuration.Examples: Classification by DSCP or Precedence Values.Examples: VLAN ID Layer 2 Classification. Examples: Class of Service DSCP Classification.Examples: Class of Service Layer 2 Classification.Examples: Classification by Access Control Lists.Configuring Egress Queue Characteristics.Configuring QoS Features and Functionality.Classifying, Policing, and Marking Traffic on SVIs by Using Policy Maps.Classifying, Policing, and Marking Traffic on Physical Ports by Using Policy Maps.Attaching a Traffic Policy to an Interface.Port Security on a Trusted Boundary for Cisco IP Phones.Classification Based on Information that is Device Specific.Classification Based on Layer 3 or Layer 4 Header.Classification Based on Information That is Propagated with the Packet.End-to-End QoS Solution Using Classification.Supported QoS Features for Wired Access.
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