3Com 3CB9LF36RL - Manuals

System Requirements 9 System Requirements Each CoreBuilder 9000 Enterprise Switch has these minimum system requirements: ■ One switch fabric module installed in the CoreBuilder 9000 chassis with appropriate software: ■ For all CoreBuilder 9000 chassis: One 24-port Gigabit Ethernet Switch Fabric Modu...

10 C HAPTER 1: O VERVIEW Optional Switch Fabric Module Redundancy In the CoreBuilder 9000 8-slot chassis and 16-slot chassis, you can install a second Gigabit Ethernet Switch Fabric Module for redundancy. CAUTION: If you install a second Gigabit Ethernet Switch Fabric Module for redundancy, it must ...

12 C HAPTER 2: R ELEASE H IGHLIGHTS Web-based Management Software Release 3.0 supports the Web Management suite of features, which consists of embedded Web Management applications and installable tools: ■ Embedded Web Management applications — Use the embedded Web Management applications, which are ...

ISO Date and Time Format 13 ISO Date and Time Format The format for date and time has changed for Release 3.0 to the following syntax and now complies with ISO 8601: YYYY-MM-DDThh:mm:ss Example: 2000-02-05T03:25:34 New Modules Software Release 3.0 supports the following new modules: ■ The 20-port 10...

14 C HAPTER 2: R ELEASE H IGHLIGHTS IGMP The Internet Group Management Protocol (IGMP) ensures that multicast traffic is forwarded from the local router to multicast group members on directly attached subnetworks. The Snooping function monitors IGMP packets to ensure that multicast traffic is only f...

RMON Monitoring Applications 15 RMON Monitoring Applications New versions of LANsentry ® Manager are being released. You can use 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 CoreB...

Loop Detection 17 When the module disables a front-panel port to eliminate a loop, you must bring the port back online manually. Example: CB9000@slot 5.1 [36L-E/FEN-TX-L2] (): bridge Menu options (CoreBuilder 9000-10AD6C): ---------------------------------------- display - Display bridge information...

Bridge Address Learning Limits 19 Bridge Address Learning Limits By default, the 36-port 10/100BASE-TX Desktop Switching Modules (Model Numbers 3CB9LF36RL and 3CB9LF36TL) support two bridging addresses (learned plus static) per front-panel port. You can manually change this limit to a value from 1 t...

Secure Address Learning Mode 21 The source address in an incoming packet must match a static address that you have configured on a port before the packet can enter that port. If an incoming packet contains a different source address than the one set for the port, the module shuts the port down and y...

22 C HAPTER 2: R ELEASE H IGHLIGHTS Configuring One Untagged System VLAN The 36-port 10/100BASE-TX Desktop Switching Modules (Model Numbers 3CB9LF36RL and 3CB9LF36TL) support a backplanePortPVID command that allows you to assign one virtual LAN (VLAN) to be an untagged system VLAN on the backplane. ...

Broadcast, Multicast, and Flood Rate Limiting 23 Broadcast, Multicast, and Flood Rate Limiting You can define rate limits for broadcast, multicast, and flood packet types on the 36-port 10/100BASE-TX Desktop Switching Modules (Model Numbers 3CB9LF36RL and 3CB9LF36TL). To participate in broadcast, mu...

24 C HAPTER 2: R ELEASE H IGHLIGHTS Example: CB9000@slot 5.1 [36L-E/FEN-TX-L2] (bridge): multicast Menu options (CoreBuilder 9000-10AD6C): igmp - Administer IGMP snooping multicastLimit - Set the multicast packet rate limit broadcastLimit - Set the broadcast packet rate limit floodLimit - Set the fl...

Broadcast, Multicast, and Flood Rate Limiting 25 Example: If in a 1-second period, 3,500 fps are received from the backplane port, 3,000 packets are transmitted out ports 3 and 10. Port 11, however, which does not participate in module multicast rate limiting, transmits the entire 3,500 fps. Port Mu...

26 C HAPTER 2: R ELEASE H IGHLIGHTS 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 and Thresholds Work The following example...

3 R ELEASE I SSUES This chapter discusses the following issues for major software Release 3.0: ■ Corrected Problems ■ System Issues ■ Known Problems ■ Documentation Changes Corrected Problems This section discusses problems that have been corrected in software Release 3.0. The numbers that appear in...

28 C HAPTER 3: R ELEASE I SSUES ■ Current autonegotiation status is now correctly reflected the first time that you view the Ethernet summary and detail displays. (27864) ■ Whenever a non-switch fabric module is reset (with the module nvData reset command, by inserting the module into a CoreBuilder ...

System Issues 29 VLANs ■ Removing the default VLAN before you create additional VLANs no longer causes modules to go down after a module reset. Previously, you had to move the module to another slot in the chassis to reinitialize. (26223) ■ Previously, in some configurations, the system did not allo...

30 C HAPTER 3: R ELEASE I SSUES Management ■ You may experience slow performance (response time) when you perform a walk of the a3Com.29 MIB, particularly when you request the following fields: ■ a3ComBridgePortAddressBridgeIndex ■ a3ComBridgePortAddressPortIndex Performing a walk of this MIB may al...

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 et...

32 C HAPTER 3: R ELEASE I SSUES 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...

34 C HAPTER 3: R ELEASE I SSUES Known Problems This section describes problems that are known to exist in Layer 2 switching module operational software Release 3.0. The numbers that appear in parentheses at the end of some descriptions are for internal 3Com use only. System ■ At the Administration C...

Known Problems 37 ■ The object a3ComSysBridgePortAddressStaticPort should return one of the following values: ■ The local bridge port index when a static address is configured for the port ■ The value 0 when a dynamic address is configured for the port However, the 9-port 1000BASE-SX Gigabit Etherne...

Known Problems 39 In addition, the port for which the report is requested does not have to be involved in the trunk for this situation to occur. ■ On a CoreBuilder 9000 with a single switch fabric module installed, when you insert a switching module that supports trunks on the backplane into an unpo...

40 C HAPTER 3: R ELEASE I SSUES Documentation Changes This section discusses issues that apply to CoreBuilder 9000 documentation. Ethernet Table 16, Ethernet Media Specifications, in Chapter 5 “Ethernet” on page 93 of the CoreBuilder 9000 Implementation Guide, the Recommended Distance column for the...

4 S OFTWARE I NSTALLATION This chapter contains the following topics: ■ How to Obtain Software Image Files ■ Installation and Upgrade Prerequisites ■ Downloading Software ■ Downgrading Switching Modules to Software Release 2.1.0 How to Obtain Software Image Files To obtain image files for software R...

42 C HAPTER 4: S OFTWARE I NSTALLATION CAUTION: Before you attempt to download any module software, save the configuration file for the release that you are currently running to an external device using the EME upload command. See the CoreBuilder 9000 Enterprise Management Engine User Guide for info...

Installation and Upgrade Prerequisites 43 If you have a new module that uses software Release 3.0, you can now select a slot for your module and install it. See the Quick Start Guide for your module for guidelines and procedures. Verifying and Updating Modules for a New Chassis When you purchase a n...

44 C HAPTER 4: S OFTWARE I NSTALLATION To obtain software upgrades and release notes, see your network supplier or 3Com representative, or visit the 3Com Web site at: http://support.3com.com/infodeli/swlib/index.htm 10 Download software to appropriate switch fabric modules and interface modules in a...

Downloading Software 45 ■ You have loaded the boot image and the operational load image in the file server directory, usually named “tftp” or “tftpboot”, from the Software CD-ROM or from the 3Com Web site at the following URL: http://support.3com.com/infodeli/swlib/index.htm ■ The management modules...

46 C HAPTER 4: S OFTWARE I NSTALLATION 3 Confirm that all of the downloads were successful. To verify that the software releases that you downloaded are correct and that the information in the module’s Auto Emergency Download fields is correct, enter the following command: show module <slot>.1...

Downloading Software 47 3 At the prompt, enter nvData The nvdata menu options screen appears. 4 At the prompt, enter emergencyDownload The following prompt appears: Enter file server IP address {?} [<IP address>]: Where <IP address> is the location of the server where the non-corrupted s...

5 R EFERENCE This chapter contains the following topics: ■ Identifying Modules in the Switch ■ Applicable Documents ■ MIB Files ■ Entering Commands ■ Understanding Autonegotiation ■ Year 2000 Compliance Identifying Modules in the Switch The CoreBuilder 9000 Enterprise Switch uses an abbreviated vers...

50 C HAPTER 5: R EFERENCE 3CB9LF10MC 10-Port 100BASE-FX Fast Ethernet Layer 2 Switching Module 10-E/FEN-FX-L2 3CB9LF20MM 20-Port 100BASE-FX (MT-RJ) Fast Ethernet Layer 2 Switching Module 20-E/FEN-FX-L2 3CB9LF36R 36-Port 10/100BASE-TX Fast Ethernet RJ-45 Layer 2 Switching Module 36-E/FEN-TX-L2 3CB9LF...

Applicable Documents 51 Applicable Documents For information about installing, managing, and using the Layer 2 switching modules, as well as their specifications, see these documents: ■ The Quick Start Guide that is shipped with each module ■ CoreBuilder 9000 Implementation Guide ■ Command Reference...

52 C HAPTER 5: R EFERENCE ■ IF-MIB-V1SMI.mib — IF MIB Version 1, RFC 1573. Unsupported tables in this MIB: ■ ifTestTable ■ ifRcvAddressTable ■ ifHC 64-bit counters ■ MIB2-MIB.mib — MIB-II MIB, RFC 1213. Unsupported group in this MIB: egp group ■ RMON-MIB.mib — RMON MIB, RFC 1757. Supported groups in...

Entering Commands 53 ■ 3cVlan.mib — 3Com VLAN MIB (43.10.1.14.1). ■ 3cWeb.mib — 3Com Web Management MIB (43.29.4.24). ■ cb9000Mod.mib — Layer 2 and Layer 3. MIB names and numbers are usually retained when organizations restructure their businesses; therefore, some of the 3Com Enterprise MIB names ma...

54 C HAPTER 5: R EFERENCE ■ If a Gigabit Ethernet switching module port has autonegotiation enabled with the port enabled, but the remote end of the connection has autonegotiation enabled with the port disabled, the enabled port goes on-line and the port LED lights green. The disabled port stays off...

6 T ECHNICAL S UPPORT 3Com provides easy access to technical support information through a variety of services. This chapter describes these services. Information contained in this chapter is correct at time of publication. For the most recent information, 3Com recommends that you access the 3Com Co...

56 C HAPTER 6: T ECHNICAL S UPPORT 3Com FTP Site Download drivers, patches, software, and MIBs across the Internet from the 3Com public FTP site. This service is available 24 hours a day, 7 days a week. To connect to the 3Com FTP site, enter the following information into your FTP client: ■ Hostname...

Support from Your Network Supplier 57 Access by Digital Modem ISDN users can dial in to the 3Com BBS using a digital modem for fast access up to 64 Kbps. To access the 3Com BBS using ISDN, call the following number: 1 847 262 6000 3Com Facts Automated Fax Service The 3Com Facts automated fax service...

58 C HAPTER 6: T ECHNICAL S UPPORT When you contact 3Com for assistance, have the following information ready: ■ Product model name, part number, and serial number ■ A list of system hardware and software, including revision levels ■ Diagnostic error messages ■ Details about recent configuration cha...

Returning Products for Repair 59 Returning Products for Repair Before you send a product directly to 3Com for repair, you must first obtain an authorization number. Products sent to 3Com without authorization numbers will be returned to the sender unopened, at the sender’s expense. To obtain an auth...