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

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16CHAPTER 2: RELEASE HIGHLIGHTS

You configure the front-panel ports to participate in this algorithm using three options in the bridge loopdetectmode menu:

■disable — This default setting disables the module’s port-based algorithm.

■enable — When you configure the module using the bridge loopdetectmode enable option, the module searches for traffic loops by comparing Spanning Tree Bridge Protocol Data Unit (BPDU) packets that enter its backplane port with BPDU packets that enter its front-panel ports. If the module detects the same BPDU packet coming through both its backplane port and any front-panel port, the module:

■Disables the front-panel port where the BPDU packet entered.

■Sends a trap to the EME.

■Displays loop detect for the port status in the bridge port summary and bridge port detail displays.

■immediate — When you configure the module using the bridge loopdetectmode immediate option, the module searches for any Spanning Tree BPDU packets that are received on its front-panel ports. If the module detects that a BPDU packet is received on any front-panel port, the module:

■Disables the front-panel port where the BPDU packet entered.

■Sends a trap to the EME.

■Displays bpdu detect for the port status in the bridge port summary and bridge port detail displays.

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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 Boot Code SystemRequirements Operational CodeRedundancy 3CB9LG9MCRelease Highlights IgmpCoreBuilder 9000 Enterprise Switch Web-basedManagement 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 Learning Mode Secure AddressAddresses are taken from the per-port address allocations See the previous section Bridge Address Learning LimitsSecure Address Learning Mode Vlan Broadcast Multicast,Flood Rate Limiting Vlan as the arriving packetMulticastlimit Limiting is on a per-port basis only Release Highlights Release Issues Corrected ProblemsSystem ManagementWhenever a non-switch fabric module is reset with VLANs StagingWeb-based System Issues Modules have only one backplane port Model Number 3CB9LF36RL or 3CB9LF36TL to act as an IgmpModule TrunkingSystem Issues Release Issues Known Problems Release Issues Known Problems Administration Console of the 36-port 10/100BASE-TX Fast Modify commandNot reset after you enter the module baseline set command If a trunk is configured on a module, the following fieldsKnown Problems Changes DocumentationDocumentation Software Installation Chassis At the EME prompt, enterYour module for guidelines and procedures Order specified in the following procedureVerifying ModulesPower to these module slots Following procedure explains how to download softwareSoftware next in this chapter 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 Switch ReferenceIdentifying Modules3CB9LG2MC Applicable DocumentsMIB Files CoreBuilder 9000 Implementation GuideReference Understanding Entering CommandsAutonegotiation Compliance Year3Com Year 2000 Web Services ServicesTechnical Support 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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