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

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26CHAPTER 2: RELEASE HIGHLIGHTS

This example sets the port-ingress threshold to 1000 fps for port 1. If incoming traffic exceeds this 1,000-fps threshold on the port for 7 continuous seconds, the module permanently disables the port.

How Port Rate Limits The following example illustrates what happens when, for example, you and Thresholds Work specify an ingress threshold of 2,000 fps for multicast packets on ports 3

and 10.

Example: If port 3 receives multicast packets at 1,500 fps and port 10 at 1,700 fps, both ports are functioning within the 2,000-fps ingress threshold. If either port begins to receive multicast packets at a rate greater than 2,000 fps, the module monitors the port for 1 second.

■If the monitored port’s packet-ingress rate decreases to less than 2,000 fps during this 1-second period, the module resumes comparing its ingress rate against the 2,000-fps threshold.

■If the monitored port’s packet-ingress rate remains more than

2,000 fps during the entire 1-second period, the module temporarily disables the port for 1 second. After this 1-second period, the module brings the port back online and resumes comparing its ingress rate against the 2,000-fps threshold.

If as a result of this process, a port exceeds the packet-ingress threshold for 7 continuous seconds, the module:

■Disables the port permanently.

■Sends a trap to the EME.

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

When the module disables a front-panel port, user intervention is required to reenable the port.

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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 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 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 Documentation DocumentationChanges 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 Autonegotiation Entering CommandsUnderstanding 3Com Year 2000 Web YearCompliance Technical Support ServicesServices 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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