Related Manuals

By default, each of the STH hub’s TCU ports is conﬁgured to its STN (station) setting to support concentrator lobe connections to stations. Through Local Management, any TCU port may be reconﬁgured to its RO (Ring Out) setting to support connections to passive MAU (Multi- Station Access Unit) workgroups.

Improved Protection from Beaconing

The STH provides enhanced reliability for existing networks which use passive MAUs because Multiple Ring Out TCUs allow for the separate attachment of each MAU. Rather than daisy-chaining MAUs together as a single entity and risking their collective isolation in case of beaconing, the user can now attach each MAU individually, reducing the number of MAU ports that are at risk of collective isolation in case of beaconing on the ring; ABRP is able to bypass individually connected MAUs on an individual rather than collective basis. See Figure 1-2.

No Connection Redundancy

The STH hub’s Ring Out TCU conﬁguration does not provide for the MAU’s redundant connection to the ring. In the common conﬁguration, a MAU chain is dual-attached to the Token Ring LAN via both a Ring Out cable and a Ring In cable. Using a TCU port, however, each passive MAU workgroup is physically connected to the hub in the same manner as a station—by a single cable—and therefore is not provided a backup path between the MAU and the Token Ring network. Only the dual attachment of Ring In and Ring Out cables can provide a backup path. This level of connectivity must be provided by a dedicated pair of Ring In / Ring Out ports such as those available on the intelligent hub.

1.3Related Manuals

Use the STHi User’s Guide (PN 9031390) and the MicroMMAC-xxT User’s Guide (PN 9031320) to supplement the procedures and other technical data provided in this manual.

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42, 24, STHI-44, STH-22 specifications

Cabletron Systems was a pioneer in networking technology, and its STH series, particularly the STH-22 and STHI-44, 24, and 42 models, stand out in the history of networking equipment. These devices were designed for high-performance network management and offered a multitude of features that helped organizations manage their networking resources efficiently.

The STH-22 was a compact and efficient network switch, primarily developed to serve small to medium-sized businesses. One of its main features was its ability to support multiple user connections while offering low latency and high throughput. The STH-22 utilized advanced packet-switching technology to ensure data could move rapidly across the network, enhancing overall communication and productivity.

On the other hand, the STHI-44 model addressed the needs of larger enterprises. It featured advanced routing protocols and could handle a greater number of simultaneous connections, making it ideal for environments with high data traffic. The STHI-44 also incorporated redundancy features to minimize downtime, a vital requirement for businesses that relied heavily on continuous network availability.

The STH-24 and STH-42 models focused on versatility and scalability, catering to a broad range of networking needs. Both models provided extensive support for various networking protocols and featured robust hardware for enhanced durability. The STH-24 was designed for offices requiring mid-range capabilities, while the STH-42 targeted enterprises with more demanding networking requirements.

All STH series devices were built with ease of management in mind. They included user-friendly interfaces that allowed IT personnel to monitor traffic, configure network settings, and troubleshoot issues in real-time. Additionally, the devices supported SNMP (Simple Network Management Protocol) for seamless integration into existing network management systems.

Another defining characteristic of the Cabletron STH series was its commitment to security. These devices came equipped with features that permitted administrators to set access controls and monitor network activity, thereby safeguarding against unauthorized access and potential threats.

In summary, Cabletron Systems' STH-22, STHI-44, STH-24, and STH-42 models represent a significant advancement in networking technology. With their diverse features, high-performance capabilities, and user-centric design, they have served a critical role in optimizing network resources, ensuring businesses were equipped to handle increasing connectivity demands.