3Com 3CB9LF10MC, 3CB9LF36RL, 3CB9LF36TL, 3CB9LG9MC, 3CB9LF20MM manual 802.1p CoS, Loop Detection

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RMON Monitoring Applications 15

RMON Monitoring New versions of LANsentry® Manager are being released. You can use

Applications LANsentry Manager to monitor traffic and error rates for hosts on a network, along with traffic flows between these hosts. When you set up LANsentry Manager with the CoreBuilder 9000, take these factors into consideration:

■To access a CoreBuilder 9000 module, use the community string plus extension format as follows:

<community string>@slot_<slot>.<subslot>

 

For switch fabric modules use this format:

 

<community string>@fabric

 

For example, to access a module in slot 4 using the read/write

 

community string of “private”, enter private@slot_4.1

 

■ If you have any problems connecting to the CoreBuilder 9000 using

 

LANsentry Manager, increase the SNMP timeout values.

 

See “Remote Monitoring (RMON)” in Chapter 21”Device Monitoring” of

 

the CoreBuilder 9000 Implementation Guide for more details.

 

 

802.1p CoS

802.1p Class of Service (CoS) focuses on traffic class and dynamic

 

multicast filtering services in bridged LANs. It addresses separate queuing

 

of time-critical frames to reduce the jitter caused by multicast flooding.

 

802.1p uses the same tag format as 802.1Q, but uses three additional

 

bits of the tag control information for setting a user priority level.

 

 

Loop Detection

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

 

Numbers 3CB9LF36RL and 3CB9LF36TL) recognize Spanning Tree packets

 

but these modules do not participate in Spanning Tree. Instead, the

 

modules can implement a separate loop-detection algorithm on all of

 

their front-panel ports.

This algorithm acts only on the 36-port 10/100BASE-TX Desktop Switching Module front-panel ports, and does not act on other Layer 2 modules in the CoreBuilder 9000 system.

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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 ManagementISO Date and Time FormatNew Modules 10/100 Mbps Ethernet Port Monitoring QueryingSnooping 802.1p CoS Loop DetectionCoreBuilder 9000 Implementation Guide for more details Release Highlights LoopDetectMode loopDetectSrcAddress Enable 08-00-8f-75-48-86 LoopDetectStatus Bridge Address Learning LimitsAddresses 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 Documentation ChangesDocumentation 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 Entering Commands UnderstandingAutonegotiation Year Compliance3Com Year 2000 Web Online Technical ServicesServices Technical SupportAccess by Analog Modem Username anonymousModem Isdn 24 hours a day, 7 days a week Access by Digital Modem 847 262408 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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