The SmartSwitch 2000 Chassis View

Ingress List Operation

A port’s ingress list specifies the VLAN with which received frames will be associated. The switch’s Filtering Database tracks the associations between VLAN eligibilities, MAC addresses, and port numbers.

Untagged frames received by an 802.1Q switch port are classified according to the VLAN membership of the port that receives the frame.

Tagged frames received by an 802.1Q switch port are classified according to the VLAN indicated in their tag header. A port may receive a tagged frame that specifies a VLAN other than the one assigned to the port.

Egress List Operation

Each port’s egress list specifies which VLANs are associated with the port, and specifies what type of frame (tagged or untagged) to transmit for each particular VLAN on a port. This information may be statically defined by the user, or dynamically learned and maintained by the switch’s Filtering Database.

If a port receives a tagged frame that specifies a VLAN other than the one assigned to the port, the switch will dynamically associate that frame’s source address and VLAN with the port (i.e., add that frame’s VLAN to the receiving port’s egress list). Dynamically learned VLANs are subject to the same aging rules as source addresses (e.g., if a tagged frame belonging to a dynamically learned VLAN is not received by the port within the switch’s aging time, the transmitting station’s source address and VLAN will be aged out for that port; no unknown destination frames belonging to the station’s VLAN will be transmitted through the port until the VLAN is dynamically learned once again). Only tagged frames can cause the switch to dynamically change a port’s egress list.

802.1Q Port Types

Each 802.1Q switch port is assigned a mode of operation. Port types include:

1Q Trunk

If VLAN membership is to apply to users across several switches, ports used to connect 802.1Q-aware devices are configured to use 1Q Trunk mode. In this mode, all frames (except BPDUs) are transmitted with a tag header included in the frame, allowing VLAN frames to maintain their VLAN ID across multiple switches. Any untagged frames received by the port are dropped. 1Q Trunk ports are configured to be members of all VLANs.

1d Trunk

This mode allows a port to transmit to a traditional (802.1d) switch fabric. These ports transmit only untagged frames, and the switch expects to receive only untagged traffic through the port. 1d Trunk ports are configured to be members of all VLANs. This mode can be used to share a connection among multiple VLANs (e.g., sharing a server between two or more separate VLANs).

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Managing the Hub

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Enterasys Networks 2000 manual Ingress List Operation, Egress List Operation, 802.1Q Port Types, 1Q Trunk, 1d Trunk

2000 specifications

Enterasys Networks, a key player in the networking space in 2000, was renowned for its innovative solutions that combined high-performance networking with robust security features. Founded with the vision of providing enterprise-level networking infrastructure, Enterasys positioned itself to cater to the growing demands of business networks during the dot-com boom.

One of the main features of Enterasys Networks was its focus on delivering secure, scalable networking solutions that could seamlessly integrate with existing enterprise systems. The company developed a range of products including switches, routers, and wireless solutions that were designed to optimize performance while ensuring security at every layer. Their core offerings provided businesses with the reliability required to handle increasing volumes of data traffic.

A standout technology of Enterasys was its identity and access management solutions. These technologies allowed organizations to control who could access network resources and under what conditions. This was particularly crucial in a time when cyber threats were on the rise, and businesses were becoming more aware of the need for strict network security protocols. The features included role-based access control and authentication measures, which were fundamental in safeguarding sensitive information.

Enterasys also introduced intelligent networking features, which enabled dynamic traffic management and prioritization. This technology helped organizations optimize their network performance by automatically adjusting to changing workload demands. Such capabilities were essential for businesses relying on bandwidth-intensive applications and services.

The company also embraced the rising trend of wireless networking, providing solutions that combined wired and wireless technologies for a unified experience. Enterasys Wireless LAN solutions were groundbreaking at the time, offering seamless connectivity and security to mobile devices, thereby enhancing productivity and flexibility within enterprise environments.

In addition to hardware, Enterasys developed network management software that simplified the administration of complex networks. This software enabled IT professionals to monitor performance, troubleshoot issues, and implement security policies efficiently.

Overall, Enterasys Networks in 2000 was characterized by its commitment to delivering secure, intelligent networking solutions that catered to the needs of modern enterprises. With its innovative technologies and features, Enterasys played a significant role in shaping the networking landscape, laying the groundwork for future advancements in network security and management.