Managing Ethernet MicroLAN Switches

the portÕs link status goes to ÒNo LinkÓ and the repeater generates a portLinkDown trap. When a port in a ÒNo LinkÓ condition receives a link signal, the port goes to a ÒLinkÓ condition and the repeater generates a portLinkUp trap. Devices at both ends of the disconnected or broken cable will generate the portLinkDown and portLinkUp traps, even when only one end of the cable has been removed.

Note that BNC (thin coax), AUI, and transceiver ports do not support a link signal. BNC ports respond to changes in link status by generating portSegmenting and portUnsegmenting traps (see description, below); AUI and transceiver ports do not respond at all to changes in link status (unless the port has been segmented due to excessive collisions), and will always display as on, even if no cable is connected.

Information included in a Link State trap will include the board number and port number associated with the trap.

Segmentation Traps

CabletronÕs Ethernet repeaters count collisions at each port. If a port experiences 32 consecutive collisions, or if the portÕs collision detector is on for more than

2-3 µs, the repeater segments the port to isolate the source of the collisions from the rest of the network. When the repeater segments a port, it generates a portSegmenting trap. As soon as a segmented port receives a good packet, the repeater reconnects the port to the network and generates a portUnsegmenting trap.

Note that, because they do not support the Link signal, unterminated BNC (thin coax) ports appear as segmented. When you attach a thin coax cable or a terminator to a port, the repeater generates a portUnsegmenting trap; when you remove the cable or terminator, the repeater generates a portSegmenting trap. As mentioned above, these traps can serve as notiÞcation of changes in link status. Note, too, that devices at both ends of the cable segment will generate the portSegmenting and portUnsegmenting traps, even if only one end of the cable has been disconnected.

Information included in a Segmentation trap will include the board number and port number associated with the trap.

Source Address Traps

The Ethernet MicroLAN Switch can issue several different traps in response to changes in a portÕs Source Address Table:

A newSourceAddress trap is generated when a station port Ð one receiving packets from no source addresses, or from one or two source addresses Ð receives a packet from a source address that is not currently in its source address table. Information included in this trap includes the module number, port number, and source address associated with the trap. Trunk ports Ð those receiving packets from three or more source addresses Ð will not issue newSourceAddress traps.

Trap Selection

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Cabletron Systems 2000 manual Segmentation Traps, Source Address Traps

2000 specifications

Cabletron Systems was a prominent company in the networking and communications industry during the late 20th century, and by the year 2000, it had established itself as a leader in providing high-performance networking solutions. The company was known for its innovative approach to network architecture and its commitment to delivering reliable products that enabled seamless connectivity in various environments.

One of the primary features of Cabletron Systems in 2000 was its advanced networking technologies, including Local Area Network (LAN) and Wide Area Network (WAN) solutions. The company specialized in developing multi-layer switches that could efficiently manage traffic and deliver high-speed data transfer. Their products were particularly popular in enterprise settings, where network performance and reliability were paramount.

Cabletron's solutions included a range of products, from Ethernet switches to routers, which were designed with scalability and flexibility in mind. This allowed businesses to adapt their networks to accommodate growth, without the need for a complete overhaul of their infrastructure. The company’s Integrated Networking Architecture (INA) was a significant innovation during this period, enabling efficient communication and management of diverse network resources.

Another major characteristic of Cabletron Systems was its commitment to interoperability. The company’s products were designed to be compatible with several industry standards, ensuring that organizations could easily integrate Cabletron solutions into their existing networks. This focus on compatibility helped to foster collaboration among different devices and systems, further enhancing network efficiency.

Security was also a key feature of Cabletron’s offerings in 2000. With growing concerns about data breaches and unauthorized access, the company incorporated advanced security measures into its products. These features included robust authentication protocols, encryption options, and secure management interfaces, which helped safeguard sensitive data during transmission.

Customer support and service were paramount to Cabletron Systems' business model. The company provided extensive resources, including training and technical support, to ensure that customers could maximize the potential of their networking solutions. This dedication to customer satisfaction contributed significantly to Cabletron’s reputation in the marketplace.

In summary, Cabletron Systems in 2000 emerged as a frontrunner in the networking industry, characterized by its innovative technologies, commitment to interoperability, emphasis on security, and strong customer support. Their products and solutions were designed to empower businesses, helping them achieve greater efficiency, scalability, and reliability in their network operations.