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General| Jumbo Frame Support | Yes |
|---|---|
| Manageable | Yes |
| Features | VLAN support |
| Power Supply | Internal AC power supply |
| Dimensions | 440 x 300 x 44 mm |
Details the guide's purpose, target audience, and prerequisite knowledge for network administrators.
Provides a table mapping common tasks to the specific chapters or appendix sections where they are discussed.
Explains document conventions for clarity, including icons and text formatting.
Provides an overview of the Switch 3800, its role in creating high-speed networks, and its capabilities.
Lists the main features of the Switch 3800, including port types, database support, and operation.
Describes the 24 autosensing 10/100 Mbps ports and the Gigabit Ethernet ports with GBIC connectors.
Explains how VLANs ease device moves, control traffic, and provide enhanced security by segmenting networks.
Enables routing of IP traffic between configured VLANs acting as virtual router interfaces.
Describes the front panel, including autosensing 10/100 Mbps ports, Gigabit Ethernet ports, and status LEDs.
Details the behavior and meaning of the port status and unit status LEDs.
Describes the rear panel features, including power socket, serial number, MAC address label, and console port.
Lists the default settings for various switch parameters, including accounts, port status, and protocols.
Emphasizes reading safety information in Appendix A before installing or removing any components.
Covers deciding on the switch location and mounting options, including rack mounting and free-standing.
Details console port settings (baud rate, data bits) and provides pin-out information for console connector cables.
Guides users through the initial login process after Power On Self-Test (POST), using default credentials.
Explains the two security access levels: User and Administrator, outlining their respective capabilities and privileges.
Outlines the three primary methods for managing the switch: console port, Telnet over TCP/IP, and SNMP.
Provides detailed steps for manually configuring IP addresses and subnet masks for VLANs to enable management.
Covers configuring SNMP trap receivers, community strings, system contact, name, and location.
Describes the `ping` and `traceroute` commands used to check network connectivity and trace paths.
Details how to enable or disable individual ports on the switch using specific commands.
Explains the steps involved in entering commands, including privilege levels and command structure.
Presents a table of common commands used for managing the switch, such as creating accounts, VLANs, and configuring time.
Lists the categories of commands available for the Switch 3800, such as General, User Account, VLAN, and IP commands.
Defines Virtual LANs (VLANs) as logical network segments, independent of physical connections, for better administration.
Describes IEEE 802.1Q tagging, which inserts a marker (tag) into Ethernet frames to identify specific VLANs.
Enables defining protocol filters to match criteria for classifying packets into specific VLANs.
Provides examples of creating port-based, tag-based, and protocol-based VLANs, showing command usage.
Describes the Switch Forwarding Database (FDB), its contents, and how it's used to forward or filter frames.
Details the three types of FDB entries: Dynamic, Static, and Permanent, and how they are managed.
Lists commands for configuring FDB entries, including creating permanent entries and setting aging times.
Introduces STP as a bridge-based mechanism for fault tolerance, ensuring loop-free networks by managing parallel paths.
Describes the three operational stages of STP: Initialization, Stabilization, and Reconfiguration in response to network changes.
Explains how the switch can partition into multiple virtual bridges (STPDs), each running an independent spanning tree instance.
Covers configuring STP parameters like Hello Time, Forward Delay, Bridge Priority, Path Cost, and Port Priority.
Introduces the switch's Layer 3 IP unicast routing capabilities, including RIP protocol usage and dynamic routing table building.
Explains that VLANs with assigned IP addresses function as router interfaces, enabling inter-VLAN routing.
Outlines the steps for configuring IP unicast routing, including setting the operating mode, creating VLANs, assigning IP addresses, and enabling routing.
Explains how to configure the switch to forward DHCP or BOOTP requests between subnets, facilitating network services.
Describes the status monitoring facility, providing information about the switch for technical support and performance analysis.
Explains how to view port statistics, including link status, packet counts, byte counts, and collisions.
Details various port error types, such as CRC errors, oversize frames, undersize frames, and late collisions.
Explains the information captured in the switch log, including timestamps, fault levels, and subsystem information.
Explains how RMON capabilities help network administrators monitor efficiency and reduce network load by providing remote statistics.
Describes the procedure for upgrading the switch software image using a TFTP server and the `download image` command.
Explains how to save configuration changes to non-volatile storage using the `save config` command to retain them after reboot.
Details how to return the switch configuration to factory defaults using the `unconfig switch` command.
Provides crucial safety warnings that must be read and followed before installing, removing, or maintaining the switch.
Covers safety precautions related to power supply, including using the correct adapter, earthing, and outlet requirements.
Details country-specific approval requirements, specifications, and plug types for power cords to ensure safe operation.
Explains the procedure for safely replacing the fuse, including disconnecting power and using correct fuse types.
Warns users not to look directly into fiber optic ports or cables when powered on, identifying it as a Class 1 Laser Device.
Provides warnings about lithium battery replacement, explosion risks, and proper disposal according to manufacturer and local regulations.
Lists the physical dimensions, weight, operating temperature, storage temperature, and operating humidity of the switch.
Details agency certifications (IEC, UL, CSA) and electromagnetic compatibility standards the device meets.
Lists the Ethernet standards, SNMP protocols, MIBs, and terminal emulation protocols that the switch supports.
Provides guidance on troubleshooting issues related to the Power LED, MGMT LED, and Status LED not lighting.
Addresses issues with the initial welcome prompt not displaying and checks for correct terminal emulator settings.
Covers troubleshooting steps for SNMP Network Manager and Telnet workstation access issues, checking IP configuration and access enablement.
Explains how to resolve a "Protocol conflict" error when adding a port to a VLAN, typically due to untagged traffic conflicts.
Lists various online services provided by 3Com for product support, including their website, BBS, fax service, and forum.
Directs users to the 3Com Corporation's World Wide Web site for the latest networking information, news, and support.
Explains the necessity of obtaining a Return Materials Authorization (RMA) number before sending products for repair.
Provides definitions for technical terms used throughout the manual, covering networking concepts and protocols.
Outlines the warranty terms for hardware and software products, including coverage periods and limitations.
Details limitations on 3Com's liability regarding product defects, misuse, and consequential damages.
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