Alarm

The Alarm and Event Groups allow you to record important events or immediately respond to critical network problems. The Alarm and Event Control Tables are used together to define specific criteria that will generate response events. Remember that the Web Agent can only display control entries. To define a specific entry, you must use third-party network management software. Select “Alarm” then “Alarm Entry” to display the items listed in the control table for monitoring.

Item

Description

Alarm Index

An index that uniquely identifies an entry in the alarm table.

 

Each such entry defines a diagnostic sample at a particular

 

interval for an object on the device.

Interval

Interval in seconds over which the data is sampled and

 

compared with the rising and falling thresholds.

Variable

Object identifier of the particular variable to be sampled.

Sample Type

Method of sampling the selected variable and calculating the

 

value to be compared against the thresholds. If the value of this

 

object is absoluteValue(1), the value of the selected variable

 

will be compared directly with the thresholds at the end of the

 

sampling interval. If the value of this object is deltaValue(2), the

 

value of the selected variable at the last sample will be

 

subtracted from the current value, and the difference compared

 

with the thresholds.

Value

Value of the statistic during the last sampling period.

Startup Alarm

If the first sample (after this entry becomes valid) is greater than

 

or equal to the risingThreshold AND alarmStartupAlarm is

 

equal to risingAlarm(1) or risingOrFallingAlarm(3), then a single

 

rising alarm will be generated. If the first sample (after this entry

 

becomes valid) is less than or equal to the fallingThreshold

 

AND alarmStartupAlarm is equal to fallingAlarm(2) or

 

risingOrFallingAlarm(3), then a single falling alarm will be

 

generated.

Rising Threshold

When the current sampled value is greater than or equal to this

 

threshold, and the value at the last sampling interval was less

 

than this threshold, a single event will be generated. A single

 

event will also be generated if the first sample after this entry

 

becomes valid is greater than or equal to this threshold and the

 

associated alarmStartupAlarm is equal to risingAlarm(1) or

 

risingOrFallingAlarm(3). After a rising event is generated,

 

another such event will not be generated until the sampled

 

value falls below this threshold and reaches the

 

alarmFallingThreshold.

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ELH100 specifications

The Cabletron Systems ELH100 is a robust and innovative networking device that was designed for use in high-performance network environments. Introduced during the late 1990s, the ELH100 served as a valuable solution for enterprises looking to enhance their network efficiency and reliability. This device is particularly notable for its combination of advanced features, cutting-edge technologies, and versatile characteristics.

One of the main features of the ELH100 is its ability to support multiple Ethernet standards, including 10BASE-T and 100BASE-TX, making it highly flexible for diverse networking needs. This multi-standard support provided businesses with the ability to upgrade their networking infrastructure without entirely replacing existing equipment, allowing for a more cost-effective transition to higher-speed connections.

The ELH100 is equipped with a variety of ports, enabling it to connect to various devices seamlessly. Its design includes multiple media access control (MAC) addresses and the capability of supporting a sizable number of simultaneous connections. This design ensures optimal performance, even in environments requiring high data throughput.

In terms of technology, the ELH100 utilizes a pioneering architecture for load balancing and traffic management. This technology ensures that network bandwidth is used efficiently, minimizing bottlenecks and latency while maximizing throughput. Additionally, the device features hardware-based switching, which accelerates data transmission within the network, providing a competitive edge in applications that demand high-speed access.

Another defining characteristic of the ELH100 is its management capabilities. The device supports remote management via simple network management protocol (SNMP), allowing network administrators to monitor performance, configure settings, and troubleshoot issues from a central location. Such features not only enhance usability but also contribute to improved network uptime.

The ELH100 also emphasizes security features, including VLAN support, which permits the segmentation of network traffic. This capability helps in isolating different segments of the network, increasing both performance and security by preventing unauthorized access to sensitive data.

In summary, the Cabletron Systems ELH100 is a noteworthy networking solution that amalgamates versatility, efficiency, and advanced technology, making it a mainstay in the networking devices market during the era of its popularity. Its multi-standard support, hardware-based switching, management features, and security protocols underscore its capability to meet the evolving demands of enterprise networking environments.
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