What is a Link Trap?

Link/Seg Traps

NOTE

Unterminated BNC (thin coax) ports appear in the Hub View as segmented ports. When you attach a thin coax cable or a 50 Ω terminator to a port, the repeater generates a portUnsegmenting trap; when you remove the cable or terminator, the repeater generates a portSegmenting trap. Note also that devices at both ends of the cable will generate the portUnsegmenting and portSegmenting traps, even if only one end of the cable has been disconnected.

Some Cabletron Ethernet repeater ports Ñ including RJ45 twisted pair and Þber optic ports Ñ generate a link signal to monitor the status of their connection with the device at the other end of the cable segment. If the cable is removed or broken, the portÕs link status goes to ÒNo LinkÓ and the repeater generates a portLinkDown trap. When a port in a ÒNo LinkÓ condition receives a link signal, the port goes to a ÒLinkÓ condition and the repeater generates a portLinkUp trap. Note that devices at both ends of the disconnected or broken cable will generate the portLinkDown and portLinkUp traps, even when only one end of the cable has been removed.

NOTE

BNC (thin coax), AUI, and transceiver ports do not support a link signal. As described above, BNC ports respond to changes in link status by generating portSegmenting and portUnsegmenting traps; AUI and transceiver ports do not respond at all to changes in link status (unless the port has been segmented due to excessive collisions), and will always display as on, even if no cable is connected.

Enabling and Disabling Link/Seg Traps

Although each Cabletron device comes with a number of traps built into the Þrmware, no device will generate these traps unless it is conÞgured to do so. This can be accomplished via Local Management (by enabling traps and entering your workstationÕs IP address in the Community Names screen), or via the SPMA Trap Table utility, accessible from the icon menu or from the command line. Once traps as a whole have been enabled, you can use the Link/Seg Traps feature to selectively enable and disable link and segmentation traps as required by your network management needs.

To open the Repeater Link/Seg Traps window:

from the icon:

1.Click on the appropriate SEHI100TX icon to display the icon menu.

2.Drag down to Link/Seg Traps and release.

3-2	What is a Link Trap?

SEHI100TX-22 specifications

Cabletron Systems SEHI100TX-22 is a high-performance network interface card that has been designed for reliable data transfer in various networking environments. Ideal for both enterprise and small business applications, the SEHI100TX-22 delivers exceptional performance at a competitive price point.

One of the standout features of the SEHI100TX-22 is its support for 100Base-TX Ethernet standards, which enables high-speed data transmission at rates of up to 100 Mbps. This high throughput capacity makes it an excellent choice for organizations that require swift and efficient data handling, particularly in environments with heavy network traffic.

The card is equipped with two RJ-45 connectors, allowing it to support dual-port configurations. This dual-port setup enhances networking capabilities by enabling fault tolerance and load balancing, ensuring that the network remains operational even in the event of a failure. Moreover, it supports full-duplex operation, allowing for simultaneous bi-directional data transmission, further improving overall network efficiency and performance.

Another significant advantage of the SEHI100TX-22 is its compatibility with a wide range of operating systems and platforms, including Windows, Linux, and various UNIX variants. This versatility ensures that it can be seamlessly integrated into existing network infrastructures without the need for extensive configuration or modification.

In terms of installation and maintenance, the SEHI100TX-22 is user-friendly, thanks to its Plug and Play capability. This feature allows for easy installation; users can simply insert the card into an available PCI slot, and the operating system will automatically recognize and configure the device, minimizing downtime and simplifying the setup process.

Additionally, the SEHI100TX-22 incorporates advanced technologies like Auto-Negotiation, which automatically detects the speed and duplex capabilities of the connected device, thus optimizing the network performance. The card also features various onboard diagnostic LEDs, providing real-time feedback on connection status and data activity, which aids in troubleshooting and performance monitoring.

In summary, the Cabletron Systems SEHI100TX-22 offers a robust set of features that cater to the demands of modern network environments. With its high-speed capabilities, dual-port support, compatibility across multiple operating systems, and user-friendly installation process, it remains a solid choice for organizations looking to enhance their networking performance and reliability.