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D-Link DES-2218 manual Using the Console Interface

Models: DES-2218

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DES-2218 Ethernet Switch User’s Guide

¨Forward Delay (sec) Indicates how fast any port on the DES-2218 can change its spanning state when moving towards the forwarding state. This value determines how long the port stays in each of the listening and learning states, which precede the forwarding state.

¨Bridge Max Age When the value you set for this parameter expires, and the DES-2218 still has not received a BPDU from the root bridge, it will start sending its own BPDU to all other bridges for permission to become the root bridge. If it turns out that the DES-2218 has the lowest bridge identifier, it will then become the root bridge. Bridge Max Age ranges from 6 to 40 seconds, with 20 seconds as the default value.

¨Bridge Hello Time This is the interval between two consecutive transmissions of BPDU packets sent by the root bridge to inform all other bridges that it is indeed the root bridge. If you set a Bridge Hello Time for a bridge that is not the root bridge, the setting will be used if and when this bridge becomes the root bridge. Bridge Hello Time ranges from 1 to 10 seconds, with 2 seconds as default.

¨Bridge Forward Delay. Bridge Forward Delay ranges from 4 to 30 seconds. This is the time any port on the DES-2218 spends in the “listening state” while moving from “blocking state” to “forwarding state”.

Use the following formulas when setting this parameter: Bridge Max Age ³ 2 · (Bridge Hello Time + 1 second) Bridge Max Age £ 2 · (Bridge Forward Delay - 1 second)

¨Bridge Priority This parameter sets the priority number of the system. Valid value ranges from 0 to 65535, with 0 being the highest bridge priority. Default value is 32768.

To set the STP port parameters for the switch,

1.Choose Spanning Tree Algorithm Parameters from the main menu.

Using the Console Interface

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Page 59
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D-Link DES-2218 manual Using the Console Interface
Page 58 Page 60

DES-2218 specifications

The D-Link DES-2218 is a robust and versatile 18-port Layer 2 managed switch designed for businesses seeking to enhance their network performance and reliability. With a combination of advanced features and reliable technologies, the DES-2218 offers a powerful solution for managing network traffic efficiently.

One of the standout features of the DES-2218 is its advanced Layer 2 switching capabilities. The switch supports a variety of network protocols, making it suitable for various business applications. The 18 ports, which include 16 10/100 Mbps Fast Ethernet ports and 2 Gigabit SFP slots, provide flexibility for both copper and fiber optic connections, allowing organizations to implement a tailored network infrastructure according to their specific needs.

The switch also incorporates VLAN (Virtual Local Area Network) support, enabling the segmentation of traffic for improved security and performance. This feature allows network administrators to isolate sensitive data and create efficient, manageable traffic flows that enhance overall network efficiency. Furthermore, the DES-2218 supports 802.1Q VLAN tagging, which is essential for implementing VLANs in larger, more complex networks.

In addition to VLAN capabilities, the DES-2218 offers robust Quality of Service (QoS) features. These QoS functionalities prioritize network traffic, ensuring that critical applications receive the bandwidth they need for optimal performance. This is particularly beneficial for businesses that rely on video conferencing, VoIP services, or other real-time communications.

Another notable characteristic of the D-Link DES-2218 is its support for network management protocols such as SNMP (Simple Network Management Protocol), RMON (Remote Monitoring), and WEB Management. These features enable administrators to remotely monitor and manage the network, ensuring that any potential issues can be addressed before they impact business operations.

Security is another priority in the design of the D-Link DES-2218. The switch supports various security features, including port security and MAC address filtering, which help protect the network from unauthorized access and ensure that only legitimate users can connect.

Overall, the D-Link DES-2218 is an feature-rich managed switch that combines essential technologies and characteristics to deliver a reliable networking solution for businesses of all sizes. With its extensive management capabilities, enhanced security measures, and advanced VLAN and QoS support, the DES-2218 is an ideal choice for organizations looking to optimize their network performance.