3Com 3CB9LF36RL, 3CB9LF36TL, 3CB9LG9MC, 3CB9LF20R Modules have only one backplane port, Trunking

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■ The maximum number of virtual LANs (VLANs) that you can define in a CoreBuilder 9000 system is 127. You may not be able to add every bridge port in the system to every VLAN that you have defined.
■ When the vlan remove all command is executing, it may take several minutes to remove all VLANs when the system is operating in allClosed mode.
■ The 36-port10/100BASE-TX Desktop Switching Modules (Model Numbers 3CB9LF36RL and 3CB9LF36TL) support only open VLANs. The modules do not support closed VLANs.
■ Make trunking definitions and modifications only from the Administration Console command line interface, and not through SNMP.

32CHAPTER 3: RELEASE ISSUES

 

These control addresses are included in the bridge display address

 

count field, but are not listed in the bridge port address list.

Resilient Links

■ The 36-port 10/100BASE-TX Desktop Switching Modules (Model

 

Numbers 3CB9LF36RL and 3CB9LF36TL) do not support resilient links.

 

The modules have only one backplane port.

IGMP

■ Do not allow a 36-port 10/100BASE-TX Desktop Switching Module

 

(Model Number 3CB9LF36RL or 3CB9LF36TL) to act as an IGMP

 

Querier. If you do, the module floods multicast traffic if it does not

 

receive report packets on its front-panel ports. Use the bridge

 

multicast igmp queryMode disable option to turn off querying for

 

the module. (29208)

Trunking

■When you add ports to an existing trunk, and change the port mode in the same modify operation, you need to reset the module and modify the trunk twice to add the additional ports to the trunk. The port mode is updated after the first reset operation. You can add a port to a trunk without changing the port mode in a single modify operation. (29804)

■3Com recommends that you enable the Trunk Control Message Protocol (TCMP) on each end station of a trunk. If this protocol is not enabled on both end stations, TCMP cannot correctly validate trunk configuration rules. (29581)

■The 36-port 10/100BASE-TX Desktop Switching Modules (Model Numbers 3CB9LF36RL and 3CB9LF36TL) do not support port trunking.

VLANs

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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 CDNew Modules ISO Date and TimeFormat Snooping 10/100 Mbps Ethernet Port MonitoringQuerying CoreBuilder 9000 Implementation Guide for more details 802.1p CoSLoop Detection Release Highlights LoopDetectMode loopDetectSrcAddress Enable 08-00-8f-75-48-86 LoopDetectStatus Addresses Bridge AddressLearning Limits 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 Documentation DocumentationChanges 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 Autonegotiation Entering CommandsUnderstanding 3Com Year 2000 Web YearCompliance Services ServicesTechnical Support Online TechnicalModem Isdn 24 hours a day, 7 days a week Access by Analog ModemUsername anonymous 408 727 Access by Digital Modem847 262 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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