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

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bridge port address find

System Issues 31

■The rxFrameRate and rxBytes statistics in the ethernet detail display are incorrect. These statistics incorrectly add an extra 8 bytes to every packet that a 100 Mbps port receives. For example, when a 64 byte frame is sent into a 100 Mbit port, the value 72 is displayed in the ethernet detail rxBytes field. Also, when 148,880 frames per second are sent into a 100 Mbit port, the value 151,143 frames per second is displayed in the ethernet detail rxFrameRate field.

■For non-connected front panel ports, the Autonegotiation state displays failed. This is a display issue only. This condition applies to the 9-port 1000BASE-SX Gigabit Ethernet Layer 2 Switching Module (Model Number 3CB9LG9MC). (26528)

Bridging ■ The following bridge commands may take a few minutes to complete when several VLANs are configured in the system in allClosed mode:

■bridge vlan mode

■bridge vlan define

■bridge vlan remove

■bridge trunk define

■

■

To minimize this delay, configure VLANs in order of increasing VID and remove them in order of decreasing VID.

The time that it takes for addresses to age out of address tables may be up to twice as long as the bridge aging time attribute indicates.

Bridge port addresses in the address list display are not sorted numerically. If you need to find a specific MAC address, use the

command.

■The txFrames statistic in the bridge port summary display increments on ports with a down link state. (27962)

■The bridge port address count, which is the count of the actual number of addresses in the address table, may not match the bridge port address list under certain conditions. The bridge port address list command does not list control addresses (MAC addresses for control frames that go directly to the processor). Control addresses are installed in the address table under the following circumstances:

■Spanning tree for the bridge is enabled.

■TCMP is enabled on any of the defined trunk groups.

■An IP VLAN interface is defined (there is a control address in the address table for each port within the associated VLAN).

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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 Operational Code Boot CodeSystem Requirements3CB9LG9MC RedundancyIgmp Release HighlightsSoftware CD CoreBuilder 9000 Enterprise SwitchWeb-based ManagementFormat 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 See the previous section Bridge Address Learning Limits Learning ModeSecure Address Addresses are taken from the per-port address allocationsSecure Address Learning Mode Vlan Vlan as the arriving packet BroadcastMulticast, Flood Rate LimitingMulticastlimit Limiting is on a per-port basis only Release Highlights Management Release IssuesCorrected Problems SystemWhenever a non-switch fabric module is reset with Staging VLANsWeb-based System Issues Trunking Modules have only one backplane portModel Number 3CB9LF36RL or 3CB9LF36TL to act as an Igmp ModuleSystem Issues Release Issues Known Problems Release Issues Known Problems If a trunk is configured on a module, the following fields Administration Console of the 36-port 10/100BASE-TX FastModify command Not reset after you enter the module baseline set commandKnown Problems Changes DocumentationDocumentation Software Installation At the EME prompt, enter ChassisModules Your module for guidelines and proceduresOrder specified in the following procedure VerifyingModules Power to these module slotsFollowing procedure explains how to download software Software next in this chapterShow 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 Modules SwitchReference Identifying3CB9LG2MC CoreBuilder 9000 Implementation Guide ApplicableDocuments MIB FilesReference Understanding Entering CommandsAutonegotiation Compliance Year3Com Year 2000 Web Online Technical ServicesServices Technical SupportUsername 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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