24-port NWay Ethernet Switch User’s Guide

Ingress port - A port on a switch where packets are flowing into the switch and VLAN decisions must be made. Basically, the switch examines VLAN information in the packet header (if present) and decides whether to forward the packet. If the packet is tagged with VLAN information, the ingress port will first determine if the ingress port itself is a member of the tagged VLAN and can thus receive the packet (if the Ingress Filter is enabled), and then it decides if the destination port is a member of the VLAN. Assuming both ports are members of the tagged VLAN, the packet will be forwarded. If the packet doesn’t have VLAN information in its header (is untagged), the ingress port first determines if the ingress port itself can receive the packet (if the Ingress Filter is enabled), will tag it with its own PVID (if it defined as a tagging port) and check to see if the destination port is on the same VLAN as its own PVID and can thus receive the packet. If Ingress filtering is disabled and the destination port is a member of the VLAN used by the ingress port, the packet will be forwarded. If the ingress port is an untagging port, it will only check the filter condition - if the ingress filter is enabled - before forwarding the packet.

Egress port - A port on a switch where packets are flowing out of the switch, either to another switch or to an end station, and tagging decisions must be made. If an egress port is connected to an 802.1Q-compliant switch, tagging should be enabled so the other switch can take VLAN data into account when making forwarding decisions. If an egress connection is to a non-compliant switch or end- station, tags should be stripped so the (now normal Ethernet) packet can be read by the receiving device.

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Switch Management Concepts

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D-Link DES-3225GF manual Port NWay Ethernet Switch User’s Guide
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DES-3225G, DES-3225GF specifications

The D-Link DES-3225GF and DES-3225G are both robust Ethernet switches designed to meet the networking needs of small to medium-sized enterprises and organizations. These devices are part of D-Link's comprehensive range of unmanaged layer 2 switches, known for their reliability and ease of use.

The DES-3225GF features a total of 25 Ethernet ports, including 24 10/100Base-TX ports and 1 Gigabit SFP slot, while the DES-3225G also comes with 25 ports but includes 24 10/100/1000 Mbps copper ports. Both models support Auto-MDI/MDI-X for seamless connection setup without the need for crossover cables, simplifying the deployment process.

One of the standout features of these switches is their wire-speed performance that enables high-speed data transfers and efficient traffic management. Each port is designed to provide non-blocking switching, which ensures that the bandwidth is fully utilized without any packet loss. The switches support IEEE 802.3x flow control, which helps to manage data flow and prevent overflow during heavy traffic periods.

The DES-3225GF and DES-3225G offer users a simple yet efficient way to expand their network. With a plug-and-play design, they require minimal configuration, allowing for quick integration into existing network infrastructures. These switches are equipped with a durable chassis, ensuring they can withstand the rigors of a busy IT environment.

Both models boast energy-efficient technologies that comply with IEEE 802.3az, which helps in reducing power consumption during periods of inactivity. By detecting link status and adjusting power accordingly, these switches contribute to a more sustainable networking solution.

In terms of form factor, the DES-3225GF and DES-3225G are rack-mounted, making them suitable for integration into standard network cabinets. This design ensures that the devices can be efficiently managed alongside other network equipment.

For management and security, the switches support features such as VLAN tagging and port security, allowing network administrators to segment traffic and protect the network from unauthorized access. With their sturdy build, innovative features, and straightforward implementation, the D-Link DES-3225GF and DES-3225G are ideal choices for organizations looking to enhance their network performance while keeping costs manageable.
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