3Com 3CB9LF36TL, 3CB9LF36RL, 3CB9LG9MC, 3CB9LF20MM, 3CB9LF20R, 3CB9LF10MC manual Release Issues

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34CHAPTER 3: RELEASE ISSUES

Known Problems This section describes problems that are known to exist in Layer 2 switching module operational software Release 3.0.

The numbers that appear in parentheses at the end of some descriptions are for internal 3Com use only.

System ■ At the Administration Console, entering a seemingly valid command string (two or more commands taken from menus and nested submenus) may not work. If this situation occurs, enter commands separately from one menu prompt at a time.

■Some Release 3.0.x features may become unstable when the associated switch devices are polled by Enterprise VLAN Manager, Address Tracker, and other Transcend applications that poll the bridge address MIB tables. These features and protocols include Trunk Control Message Protocol (TCMP) and Spanning Tree Protocol (STP) topology changes.

3Com recommends that you use these Transcend management applications only for configuration and problem isolation purposes. When you use these applications, SNMP polling can contribute to unexpected events in the configuration associated with TCMP and STP. (29371 and 29797)

For information about controlling the Transcend Enterprise VLAN Manager and Address Tracker management applications, see the “General Functional Limitations” section, problem NMDww04250, in the Transcend Network Control Services Readme files for the February 2000 Update.

Management ■ When you are prompted to “wait” for a reset to take place, do not attempt to start a new connection during this delay. Wait until control returns you to the Administration Console prompt before you start a new connection.

■After you enter an nvdata reset command (or initiate a trunk group definition or deletion), there is a delay before the module resets.The following MIB-II counters do not increment:

■inReceives

■tcpOutRsts

■udpOutDatagrams

■udpNoPorts

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Contents CoreBuilder Release Notes 3Com Corporation 5400 Bayfront Plaza Santa Clara, California Contents Release Issues Software Installation Page Overview Management Information Bases MIBs Requirements Boot CodeSystem Operational CodeRedundancy 3CB9LG9MCRelease Highlights IgmpManagement CoreBuilder 9000 Enterprise SwitchWeb-based Software CDFormat ISO Date and TimeNew Modules Querying 10/100 Mbps Ethernet Port MonitoringSnooping Loop Detection 802.1p CoSCoreBuilder 9000 Implementation Guide for more details Release Highlights LoopDetectMode loopDetectSrcAddress Enable 08-00-8f-75-48-86 LoopDetectStatus Learning Limits Bridge AddressAddresses Addresses are taken from the per-port address allocations Learning ModeSecure Address See the previous section Bridge Address Learning LimitsSecure Address Learning Mode Vlan Flood Rate Limiting BroadcastMulticast, Vlan as the arriving packetMulticastlimit Limiting is on a per-port basis only Release Highlights System Release IssuesCorrected Problems ManagementWhenever a non-switch fabric module is reset with VLANs StagingWeb-based System Issues Module Modules have only one backplane portModel Number 3CB9LF36RL or 3CB9LF36TL to act as an Igmp TrunkingSystem Issues Release Issues Known Problems Release Issues Known Problems Not reset after you enter the module baseline set command Administration Console of the 36-port 10/100BASE-TX FastModify command If a trunk is configured on a module, the following fieldsKnown Problems Changes DocumentationDocumentation Software Installation Chassis At the EME prompt, enterVerifying Your module for guidelines and proceduresOrder specified in the following procedure ModulesSoftware next in this chapter Power to these module slotsFollowing procedure explains how to download software ModulesShow module slot.all verbose From the EME, connect to the module You must complete to ensure that the module is updated Downgrading Switching Modules to Software Release Identifying SwitchReference Modules3CB9LG2MC MIB Files ApplicableDocuments CoreBuilder 9000 Implementation GuideReference Understanding Entering CommandsAutonegotiation Compliance Year3Com Year 2000 Web Technical Support ServicesServices Online TechnicalUsername anonymous Access by Analog ModemModem Isdn 24 hours a day, 7 days a week 847 262 Access by Digital Modem408 727 Europe Country Telephone Number North America

3CB9LF36R, 3CB9LF36TL, 3CB9LF20R, 3CB9LF36RL, 3CB9LF36T specifications

The 3Com 3CB9LF20MM, 3CB9LF10MC, 3CB9LG9MC, 3CB9LF36T, and 3CB9LF36RL are advanced networking solutions that exemplify the commitment of 3Com to delivering high-performance products for both small and large enterprises. These models feature varying specifications to accommodate different network demands while ensuring reliability and efficiency.

The 3CB9LF20MM model is designed with flexibility in mind, making it an ideal choice for small to medium-sized businesses. It supports multiple network protocols ensuring seamless integration and is equipped with enhanced security features that protect sensitive data. This model excels in environments that require high-speed connectivity and robust throughput.

Next, the 3CB9LF10MC stands out due to its compact design, making it perfect for businesses with limited space. It offers exceptional performance while maintaining low power consumption, enabling organizations to reduce their carbon footprint. This unit also includes advanced Quality of Service (QoS) features, allowing administrators to prioritize critical applications and ensure optimal network performance.

The 3CB9LG9MC is particularly noteworthy for its scalability. It is engineered to support growing network demands and can accommodate a substantial number of users without compromising performance. This model leverages cutting-edge technologies, such as advanced VLAN support and multicast routing, to facilitate efficient network management. Its robustness makes it suitable for larger enterprise environments or data-intensive applications.

The 3CB9LF36T model is designed for high capacity and speed, making it suitable for organizations that require increased bandwidth. This switch can handle heavy traffic loads effectively, ensuring smooth operation for bandwidth-intensive tasks and applications. Additionally, it comes equipped with multiple gigabit Ethernet ports, providing flexibility for various network configurations.

Lastly, the 3CB9LF36RL model features redundancy and failover capabilities, making it an excellent choice for mission-critical environments. The design emphasizes reliability, with built-in features that allow for uninterrupted service, even in the face of hardware failures. This model ensures continuous connectivity, an essential requirement for organizations where downtime can lead to significant financial loss.

In summary, the 3Com 3CB9 family of networking solutions offers a diverse array of features and technologies designed to meet varying organizational needs. From scalability and security to high capacity and reliability, these models cater to a broad spectrum of networking requirements, ensuring that businesses can maintain optimal performance in their operations.
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