Quality of Service

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Defining Queues

 

 

 

 

 

trust ip-precedence—The port uses the IP Precedence value in the IP packet header. If no value is provided, the default priority is assigned. Non-IP VLAN tagged and untagged frames are assigned the default priority.

trust ip-dscp—The port uses the DSCP marking in the IP packet header for both VLAN tagged and untagged IP packets. Non-IP VLAN tagged and untagged frames are assigned the default priority.

trust all—For IP packets, the port uses the DSCP marking to determine the priority. For non-IP frames, the port uses the 802.1p priority if the frame is VLAN-tagged and the port default priority if the frame is not VLAN tagged.

STEP 5 Click Apply and then click Close. Your changes are saved to the Running Configuration.

Defining Queues

You can use the Queue page to configure how the traffic scheduler determines which queue has access to the egress port. A queue can be configured in strict priority mode or Weighted Round-Robin (WRR) mode. By default, all queues are strict priority queues.

Packets are transmitted according to the following principles:

Packets from the highest priority queue are transmitted first.

If a queue is in strict priority mode, it is allowed to transmit until it has no more packets or until a higher priority queue has packets to send.

If a queue is in WRR mode, it is allowed to transmit a number of packets that is proportional to its configurable weight value. The weight is expressed as a percentage of the total bandwidth for each port.

A combination of strict queue and WRR queues can be configured at a port.

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Cisco Systems SLM2008PTNA manual Defining Queues

SLM2008PTNA specifications

Cisco Systems SLM2008PTNA is a robust network switch designed specifically for small to medium-sized businesses. It operates with 8 Fast Ethernet ports, providing advanced features and best-in-class performance to enhance your network infrastructure. This model ensures seamless connectivity for multiple devices, making it an ideal choice for environments requiring reliable network communication.

One of the standout features of the SLM2008PTNA is its Layer 2 switching capabilities. This switch supports auto-negotiation, which allows each port to automatically detect the speed of the connected device and adjust accordingly. This ensures optimal performance and smooth operation across various connected devices. Additionally, the switch supports a non-blocking architecture, ensuring that bandwidth is not shared, which significantly enhances data transmission speed.

Power over Ethernet (PoE) is another key technology incorporated into the Cisco SLM2008PTNA. It simplifies the installation of network devices such as VoIP phones, security cameras, and wireless access points by supplying power through the Ethernet cable. This eliminates the need for separate power sources, reducing installation costs and increasing flexibility in device placement.

Moreover, the SLM2008PTNA comes equipped with advanced security features, such as port security and VLAN support. Port security allows network administrators to restrict access to the network based on MAC addresses, preventing unauthorized access and enhancing network security. The support for Virtual Local Area Networks (VLANs) enables the segmentation of the network into different logical networks, improving traffic management and security within each segment.

The switch is designed for easy management and monitoring, featuring a user-friendly web interface that simplifies configuration. This allows network administrators to quickly set up and manage the device without requiring extensive technical knowledge. Additionally, its compact design makes it suitable for desktop or rack-mount installation, maximizing space efficiency in network environments.

In conclusion, the Cisco Systems SLM2008PTNA is an essential component for small to medium-sized businesses looking to enhance their network performance. With its Layer 2 switching capabilities, Power over Ethernet support, advanced security features, and ease of management, this switch provides a well-rounded solution for modern networking needs, delivering reliable performance and scalability for growth.