Bridging

Changing Hello Time

If the bridge is the Root Bridge, or is attempting to become the Root, and you want to change the length of time the bridge waits between sending conÞguration BPDUs:

1.Highlight the Hello Time field, and type in a new value.

2.Click on .

The IEEE 802.1d speciÞcation recommends that Hello Time = 2 seconds, with an allowable range of 1 to 10 seconds.

Changing Max Age Time

If the device is the Root Bridge or attempting to become the Root, and you want to change the maximum time that bridge protocol information will be kept before it is discarded:

1.Highlight the Max Age field, and type in a new value.

2.Click on .

The IEEE 802.1d speciÞcation recommends that Max Age = 20 seconds, with an allowable range of 6 to 40 seconds.

Changing Forwarding Delay Time

If the device is the Root Bridge or attempting to become the Root, and you want to change the time period the bridge will spend in the Listening state (e.g. either listening to BPDU activity on the network while moving from the Blocking to the Learning state or in the Learning state while the bridge is moving from the Listening to the Forwarding state):

1.Highlight the Forwarding Delay field, and type in a new value.

2.Click on .

The IEEE 802.1d speciÞcation recommends that Forward Delay = 15 seconds, with an allowable range of 4 to 30 seconds.

NOTE

To ensure proper operation of the Spanning Tree Algorithm, the IEEE 802.1d speciÞcation recommends that you always observe the following relationship between Forwarding Delay, Max Age, and Hello Time:

2 x (Forwarding Delay - 1.0) > Max Age > 2 x (Hello Time +1.0)

Bridge Spanning Tree

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Cabletron Systems CSX200, CSX400 manual Changing Hello Time, Changing Max Age Time, Changing Forwarding Delay Time
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CSX200, CSX400 specifications

Cabletron Systems was a leading developer of networking solutions, and its CSX400 and CSX200 series of high-performance switches represent some of the key innovations in the field of enterprise networking during their time. Both models were geared towards enhancing network reliability, efficiency, and speed, particularly in environments where heavy data traffic and complex networking demands were prevalent.

The CSX400, designed for larger enterprises, boasts a robust architecture capable of handling significant throughput. One of its standout features is its stackable design, allowing multiple switches to be interconnected and managed seamlessly as a single unit. This scalability provides organizations with the flexibility to expand their networks without significant infrastructure overhauls. The CSX400 supports various Ethernet standards, including 10/100 Ethernet and Gigabit Ethernet, positioning it to effectively manage both legacy and modern networking requirements.

In addition to its scalability, the CSX400 is distinguished by its advanced Layer 2 and Layer 3 routing capabilities. This dual-layer functionality enables efficient data handling and is instrumental in managing traffic between different network segments. Moreover, the switch incorporates features like VLAN (Virtual Local Area Network) support and Quality of Service (QoS) prioritization, allowing for enhanced performance of critical applications and streamlined bandwidth allocation.

On the other hand, the CSX200 series is tailored for smaller enterprises or branch offices needing a reliable yet efficient networking solution. Despite its compact design, the CSX200 is equipped with essential features that promote effective network management and security. It offers a simplified management interface, making it user-friendly for network administrators. The switch also provides essential access control measures, employing technologies like IEEE 802.1X for network access security.

Both the CSX400 and CSX200 prioritize performance through the incorporation of advanced switching technologies. They support features such as Spanning Tree Protocol (STP), enabling loop-free topologies and enhanced network resilience. These attributes are particularly crucial in dynamic networking environments where downtime can have significant repercussions on business operations.

Overall, Cabletron Systems' CSX400 and CSX200 series represent a blend of scalability, advanced routing capabilities, and user-friendly management, making them vital assets for organizations looking to optimize their network infrastructure during a period of rapid technological evolution. With their rich feature sets and unwavering performance, these switches helped pave the way for modern networking solutions that cater to diverse enterprise needs.
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