Quality of Service

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QoS Properties

 

 

 

 

 

The switch supports four egress queues for each port or LAG. Queue1 has the lowest priority and queue 4 has the highest priority.

The pages in the Quality of Service menu enable you to define the properties of the queues, and to associate to the queues the traffic that has particular characteristics or arrives on specific interfaces. You can also create rate limit profiles that define criteria for determining if a port is receiving more traffic than it can handle. You can then assign the rate limit profiles to ports.

QoS Properties

You can configure switch ports to assign traffic to egress queues based on the priority information encoded in Ethernet frames or IP packet headers. Or traffic might use a default priority value configured on the port where it arrives. When a port is configured to use the encoded priority value [such as the 802.1p, IP precedence, or DSCP (Differentiated Services Code Point) value], it is considered a trusted port. A port that is configured to use its own priority value, rather than the value encoded in the frame or packet, to make queue assignment decisions is considered untrusted.

If a port is configured as trusted but the frame or packet does not have priority information, the default port priority is assigned to the packet. The default port priority is zero.

You can use the Interface Settings page to change the value of the VLAN Priority.

You can use the QoS Properties page to define a port as trusted or untrusted and to configure which priority values it trusts.

To configure the trust mode on a port or LAG:

STEP 1 Click Quality of Service > QoS Properties in the navigation window.

STEP 2 Select a filter from the Interface Type menu to display ports or LAGs in the Trust Mode Configuration Table.

STEP 3 Select the interface to configure and click Edit.

STEP 4 To specify the type of priority values to use to determine the egress queues of the packets, select one of the following trust modes:

•untrusted—The port assigns its own default 802.1p priority (0).

•trust dot1p—The port uses the 802.1p priority value in VLAN-tagged Ethernet frames. For untagged frames, the default priority is assigned.

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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.
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