FDDI Applications

T-Req. (Requested Target Token Rotation Time)

The token rotation time bid made by the selected SMT entity during ring initialization. Each station detecting that the ring must be initialized begins a claim token process and issues a stream of Claim Frames, which negotiate the value assigned to the Target Token Rotation Time (TTRT). The information Þeld of these frames contains the issuing stationÕs bid for the value of TTRT. Each claiming station inspects incoming Claim frames (from other issuing stations) and either continues its own bid (and removes the competing Claim Frame from the ring) or defers (halts transmission of its own bid and repeats the competing bid) according to the following hierarchy of arbitration:

¥A Claim Frame with the lowest TTRT bid has precedence.

¥If the values of TTRT are equal, the frame with the longest source address (48 vs. 16 bits) has precedence.

¥If both TTRT value and source address length are equal, the frame with the highest address has precedence.

The HSIM-F6 is shipped with a T-Req = 83 msec (earlier versions of Þrmware) or 6 msec (later Þrmware versions). T-Req is stored within the MIB in units of nanoseconds (one billionth of a second) rather than milliseconds (one thousandth of a second); your Cabletron management application converts nanoseconds to milliseconds for display purposes. You can use any SNMP Set Request tool to edit the T-Req value; just remember that you must enter your value in nanoseconds, rather than milliseconds.

T-Neg. (Negotiated)

The winning time negotiated in the ring initialization sequence.

Concentrator M Ports

This Þeld displays the number of Master (M) ports on the modular concentrator controlled by the HSIM-F6. A Master port is a port that provides a connection for Single Attachment Station (SAS) devices to the FDDI network.

Concentrator Non-M Ports

This Þeld displays the number of non-Master ports (A, B, or S ports) on the modular HSIM-F6 concentrator.

Number of MACs

The number of Media Access Control entities present in the HSIM-F6, indicating the number of ring port pairs. For the HSIM-F6, this number will be 1.

MAC Path

Indicates which FDDI ring the HSIM-F6 MAC is attached to:

¥Primary 1 indicates that the Primary 1 FDDI ring is being used.

¥Secondary 1 indicates that the Secondary 1 FDDI ring is being used.

¥Primary 2 indicates that the Primary 2 FDDI ring is being used.

Concentrator Configuration

6-5

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Cabletron Systems 2000 Req. Requested Target Token Rotation Time, Neg. Negotiated, Concentrator M Ports, Number of MACs
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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.
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