Cabletron Systems SEHI-22/24, SEHI-32/34 manual Link/Seg Traps, What is a Segmentation Trap?

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Chapter 3

Link/Seg Traps

What are Link and Segmentation traps; enabling and disabling these traps at the device, module, and port levels

Among the traps which Cabletron devices are designed to generate are traps which indicate when a repeater port gains or loses a link signal, when the repeater segments (disconnects) a port due to collision activity, and when a segmented port becomes active again. In some networks, these Link and Segmentation traps may be more information than a network manager wants to see. So SPMA provides you with a means to selectively enable and disable Link and Segmentation traps: you can turn traps on and off for all ports on the SEHI, all ports on a selected module or modules, or for individual ports.

NOTE

SPMA does not accept the trap messages; that task is left to your network management system. (See the appropriate network management system documentation for details about viewing trap messages.) When this utility is used in stand-alone mode, traps will either be ignored when they return to the workstation from which you are running SPMA for the SEHI, or they will turn up at another management workstation which has been configured to accept traps. Note also that, regardless of the configuration performed using this utility, NO traps will be sent by the device unless its trap table has been properly configured; see the SEHI hardware manual and/or the Trap Table chapter in the SPMA Tools Guide for more information.

What is a Segmentation Trap?

Cabletron’s Ethernet repeaters count collisions at each port. If a port experiences 32 consecutive collisions, the repeater segments the port to isolate the source of the collisions from the rest of the network. When the repeater segments a port, it generates a portSegmenting trap. As soon as a segmented port receives a good packet, the repeater reconnects the port to the network and generates a portUnsegmenting trap.

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Contents Complete Networking Solution Page Virus Disclaimer Applicable to licenses to the United States Government only Restricted Rights NoticeContents Appendix a Sehi MIB Structure Chapter Repeater RedundancyChapter Source Addressing Chapter SecurityIntroduction to Spma For the SEHI-22/24 and SEHI-32/34 Using the Sehi User’s GuideUsing the Sehi User’s Guide Conventions What’s not in the Sehi User’s GuideScreen Displays Introduction to Spma for the SEHI-22/24 and SEHI-32/34 Button Using the MouseFTP Getting HelpSehi Firmware Page Using the Hub View Using the Sehi Hub ViewHub View Front Panel Navigating Through the Hub ViewLocation UptimeDate and Time Device NameUsing the Sehi Hub View Using the Mouse in the Hub View Ports Display Port Display Form Hub View Port Color CodesMonitoring Hub Performance Collisions ErrorsPort Display Form LoadPort Type Frame SizesChecking Device Status and Updating Front Panel Info Name and LocationContact Checking Module Status Chassis TypeName Checking Repeater Status Active UsersModule Type Link Status Checking Port StatusMedia Type StatusTopology Type Checking StatisticsBroadcast Packets Received BytesTotal Packets Avg Packet SizeMulticast Packets Total ErrorsAlignment Errors CRC ErrorsGiant Frames Runt FramesProtocols Viewing the Port Source Address ListManaging the Hub Contact Status Setting the Polling IntervalsPort Operational State Enabling/Disabling PortsDevice General Status Device ConfigurationUsing the Sehi Hub View Using the Sehi Hub View Managing the Hub Link/Seg Traps What is a Segmentation Trap?What is a Link Trap? Enabling and Disabling Link/Seg TrapsFrom the icon From the Hub View From the command line stand-alone modeViewing and Configuring Link/Seg Traps for Hub Modules Configuring Link/Seg Traps for the RepeaterModule Traps Window Viewing and Configuring Link/Seg Traps for PortsPort Traps Window Repeater Redundancy Setting Network Circuit RedundancySpmarun r4red IP address community name Configuring a Redundant CircuitChannel X Redundancy Window Add Circuit Address Window To set the Poll Interval Monitoring RedundancyClick in the All Circuits box Displaying the Source Address List Source AddressingDisplaying the Source Address List Source Addressing Setting the Ageing Time Setting the Hash TypeLocking Source Addresses Source Address Locking on Older Devices Configuring Source Address Traps Module- and Port-level Traps Device-level TrapsSource Addressing Source Addressing Port Source Address Traps Window Finding a Source AddressFind Source Address Window Click on to exit the window Source Addressing Finding a Source Address Security Spmarun r4sec IP address SU community name What is LANVIEWSECURE?New definitions for station and trunk ports Secure address assignmentTrunk port security Full or partial security against eavesdropping Newest Lanviewsecure FeaturesContinuous learning mode Configurable violation responseLearned addresses reset Security on Non-LANVIEWSECUREHubsForced non-secure status Configuring Security Security To assign secure addresses to a port Addresses Window Add MAC Address Window Resetting Learned AddressesTips for Successfully Implementing Eavesdropper Protection Enabling Security and Traps Repeater-level Security and Traps Channel a Security Window Hub-level Security and TrapsChannel a Module Security Window Port-level Security and TrapsChannel a Port Security Window Security Security Enabling Security and Traps Ietf MIB Support Sehi MIB StructureSehi Chassis MGR Repeater One Sehi Host ServicesSehi IP Services Brief Word About MIB Components and Community NamesSehi MIB Structure Sehi MIB Structure Index Index-2 Index-3 Index Index-4

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.
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