Bridging

Protocol

Displays the Spanning Tree Algorithm Protocol type the 9H42x-xx module is currently using. The choices are:

•802.1

•DEC (DEC Lanbridge 100)

•None

The following four fields display values used for various Spanning Tree timers in the course of normal operations. Three of these values — Hello Time, Max Age, and Forwarding Delay — are configurable; the values currently in use are those which have been set at the Root Bridge. Both the values currently in use and those which would be used if the monitored 9H42x-xx module were to become the root bridge are displayed in the upper-right corner of the window. Note that Hold Time is not configurable; this is a fixed value and cannot be changed.

Hello Time

This parameter indicates, in seconds, the length of time the Root Bridge (or bridge attempting to become the Root) waits before resending Configuration BPDUs. The range for this field is 1 to 10 seconds, with a default value of 2 seconds. The Root Bridge sets the Hello Time.

Max Age

This parameter displays the bridge’s BPDU ageing timer. This controls the maximum time a BPDU can be retained by the bridge before it is discarded. During normal operation, each bridge in the network receives a new Configuration BPDU before the timer expires. If the timer expires before a Configuration BPDU is received, it indicates that the former Root is no longer active. The remaining bridges begin Spanning Tree operation to select a new Root. The current Root Bridge on the network sets the Max Age time. The range for this field is 6 to 40 seconds, with a default value of 20 seconds.

Forwarding Delay

This parameter displays the time period which elapses between states while the bridge is moving to the Forwarding state. For example, while moving from a Blocking to a Forwarding state, the port first moves from Blocking to Listening to BPDU activity on the network, remains there for the Forward Delay period, then moves to the Learning State (and remains in it for the Forward Delay period), and finally moves into a Forwarding state. This timer is set by the Root Bridge. During a topology change, the Forward Delay is also used as the Filtering Database Aging Time (refer to Filtering Database, page 5-19), which ensures that the Filtering Database maintains current topology information.

Hold Time

This parameter displays, in seconds, the minimum time that can elapse between the transmission of Configuration BPDUs through a bridge port. The Hold Time ensures that Configuration BPDUs are not transmitted too frequently through any bridge port. Receiving a BPDU starts the Hold Timer. After the Hold Timer

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Bridge Spanning Tree

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Cabletron Systems 9H42X-XX manual Protocol, Hello Time, Max Age, Forwarding Delay, Hold Time
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9H42X-XX specifications

Cabletron Systems 9H42X-XX is an advanced networking device recognized for its robust performance and reliability in various enterprise environments. Designed to meet the growing demands of data communication, this model serves as a vital component of network infrastructure, offering a myriad of features and technologies.

One of the standout characteristics of the 9H42X-XX is its high-speed data processing capabilities. Equipped with multiple Gigabit Ethernet ports, it ensures rapid data transfer rates, making it ideal for bandwidth-intensive applications. This model supports both IPv4 and IPv6 addressing, ensuring compatibility with modern networking standards and future-proofing the investment for organizations transitioning to newer technologies.

The 9H42X-XX excels in flexibility and scalability, accommodating a range of networking topologies. Its modular design allows for the addition of different interface cards, catering to specific networking requirements such as VoIP, video streaming, and cloud services. This adaptiveness is crucial for organizations that must optimize their network as needs evolve over time.

Security is a primary consideration in the design of the 9H42X-XX. With built-in firewall capabilities and support for advanced encryption protocols, data integrity and confidentiality are ensured. Furthermore, the device offers robust access control features, allowing organizations to define user permissions and protect sensitive information from unauthorized access.

Another important feature is the comprehensive management options available with the 9H42X-XX. It provides a user-friendly interface for network administrators to monitor traffic, configure settings, and troubleshoot issues. This ease of management contributes to reduced downtimes and better overall network efficiency.

Additionally, the Cabletron Systems 9H42X-XX is known for its durability and performance consistency in varying environmental conditions. This resilience makes it suitable for both indoor and outdoor deployments, further extending its usability across different types of organizations.

In summary, the Cabletron Systems 9H42X-XX is a versatile networking solution that combines high-speed connectivity, security features, and ease of management within its robust architecture. Its adaptability and technical specifications position it as a reliable choice for enterprises looking to upgrade their network infrastructure and accommodate future growth.
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