FDDI Applications

FDDI Frames

There are two legal FDDI data frame types:

FDDI 802.2

The FDDI 802.2 frame type has two headers: the FDDI header (which includes the Frame Control Þeld that indicates the class of frame, length of the address Þeld, and the type of FDDI frame), and the 802.2 header.

FDDI SNAP

The FDDI SNAP frame type has an FDDI header with a Frame Control Þeld that provides FDDI framing information, and the 802.2 LLC header with FDDI Frame Control, a SNAP LSAP identiÞer, and a Þve byte protocol identiÞer.

There is no FDDI equivalent for Ethernet 802.3 Raw frames or Ethernet II frames. CabletronÕs Ethernet/FDDI bridges will automatically translate Ethernet II frames into FDDI SNAP frames, by identifying it as a SNAP frame in the LLC header, and inserting a SNAP header with the Ethernet Type Þeld.

By default, CabletronÕs Ethernet-to- FDDI bridges will translate an 802.3 Raw frame into an FDDI MAC frame Ð although you can use the FDDI Frame Translation window to alter the default translation. The FDDI MAC frame is an FDDI frame type that is deÞned for internal use by the MAC layer, and which is not passed to higher layer communications protocols on the datalink layer. Any

802.3Raw frame translated into FDDI MAC will be recognized as such by other Cabletron (and many other vendorÕs) Ethernet/FDDI bridges inserted in the ring, and will be forwarded onto the target Ethernet segment as an 802.3 Raw frame.

FDDI Frame Translation Options

The FDDI Translation window lets you select which translation methods you want enforced when translating frames from an FDDI frame format into an Ethernet frame format, and when translating Ethernet Raw frames into FDDI frames. It also lets you choose whether to allow fragmentation of IP datagrams into smaller datagrams, and enable or disable the Auto Learn Novell Frame Translation option.

To set frame translation parameters:

1.Click on the selection boxes of interest (described below), and select the desired translation options.

2.Click Apply to save your new frame translation settings at the device, or click Cancel to restore the last saved options.

IP Fragmentation

The IP Fragmentation selection box lets you specify frame fragmentation parameters. FDDI trafÞc may need to be split, or fragmented, into two, three, or four smaller frames to be successfully transmitted on an Ethernet network. For fragmentation to be allowed, the frame must be an FDDI SNAP frame with an

Configuring FDDI Frame Translation Settings

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Cabletron Systems 2000 manual Fddi Frame Translation Options, Fddi Frames, IP Fragmentation

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.