Monitoring Redundancy

Repeater Redundancy

different port to be Primary or Active, the original Primary or Active port automatically resets to Backup/Inactive.

NOTE

All backup ports will be disabled as soon as you enable the redundant circuit. The ports remain disabled until they become active due to primary port failure. If you disable the redundant circuit, you must manually enable each backup port in that circuit.

6.Once you have conﬁgured all the ports that compose the redundant circuit,

enable the circuit by clicking .

Be sure to make all physical connections to the backup ports once the redundant circuit has been conﬁgured and enabled.

To clear the settings in one circuit, highlight the Circuit Name that you want to

clear, and click on .

To clear all redundancy conﬁgurations, click on in the All Circuits portion of the window. Reset does the following:

•Deletes all entries in the Circuit Addresses box

•Changes the status of every Circuit to Disabled

•Reverts to previous Circuit Name(s)

•Clears all module and port entries

NOTE

After clearing redundancy settings by either method, backup ports remain disabled until you manually reenable them so that data loops do not occur. Before you enable the ports, disconnect their physical connections.

Once you have conﬁgured your redundant circuits, you can use the ﬁelds in the All Circuits box to set the parameters that the SEHI uses to periodically test each of the circuits. The SEHI automatically polls all enabled circuits through the Primary port and all Backup ports at the time speciﬁed in the Test Time box. If the ﬁrst poll fails (results in a no link condition with all of the circuit IP addresses), the SEHI checks the circuit’s Retries ﬁeld. If Retries is greater than 0, the SEHI waits the number of seconds speciﬁed in the Poll Interval ﬁeld, and then polls the circuit again.

To set the Poll Interval:

Monitoring Redundancy

4-5

SEHI-22/24, SEHI-32/34 specifications

Cabletron Systems was a notable player in the networking hardware market during the rise of local area networks (LANs) in the late 20th century. Among its innovative products were the SEHI-22/24 and SEHI-32/34 modules, which were designed to enhance network capabilities in enterprise environments.

The SEHI-22/24 and SEHI-32/34 were versatile high-performance Ethernet switch modules that offered significant advantages in network management and connectivity. These modules were designed to work with Cabletron's modular switching and routing architecture, allowing for scalable solutions tailored to specific network demands. A key feature of the SEHI series was its support for a range of Ethernet standards, ensuring compatibility with diverse networking environments.

One notable characteristic of the SEHI-22/24 was its ability to support both 10Base-T and 100Base-TX Ethernet technologies. This dual support enabled organizations to leverage existing 10 Mbps infrastructure while facilitating upgrades to 100 Mbps speeds without needing a complete overhaul of the network. Similarly, the SEHI-32/34 offered even greater connectivity options, accommodating more users and devices while maintaining high throughput and low latency.

In terms of management features, the SEHI series was equipped with extensive traffic management capabilities, including Quality of Service (QoS) features that prioritized bandwidth for critical applications. This ensured that essential services such as voice over IP (VoIP) and video conferencing could function optimally, even during heavy network loads.

Furthermore, both modules featured advanced diagnostics and monitoring tools that provided network administrators with critical insights into traffic patterns and potential bottlenecks. This functionality was essential for maintaining network health and optimizing performance, especially in dynamic business environments.

Security also played a crucial role in the design of the SEHI-22/24 and SEHI-32/34. The modules incorporated support for various authentication methods and access controls, ensuring that sensitive data remained protected within the corporate network.

In summary, Cabletron Systems’ SEHI-22/24 and SEHI-32/34 offered significant advancements in Ethernet switching technology, allowing organizations to build robust, scalable, and secure networks. With their impressive features, compatibility, and capacity for management and security, these modules were instrumental in shaping reliable networking solutions for enterprises navigating the rapidly evolving digital landscape.

Cabletron Systems SEHI-22/24, SEHI-32/34 manual Monitoring Redundancy, To set the Poll Interval

Models: SEHI-22/24 SEHI-32/34