3Com 5000 ATM Resetting the ATM Backbone

6-12 CHAPTER 6: TROUBLESHOOTING

Verifying ATM OC-3

Switchover

If the Redundant ATM OC-3 card does not become active u pon failure

of the primary ATM OC-3, use the following command to verify that

the PHY Automatic Failover parameter is Enabled:

CB5000> show module <slot.phy> verbose

If the PHY_Automatic_Failover parameter is not Enabled, use the

following command to enable it:

CB5000> set modu le <slot>.1 p hy_automatic_ failover enab le

If the ATM Backbone SwitchModule is still experiencing problems after

you complete the procedures above, refer to Obtaining Technical

Assistance later in this chapter.

Resetting the ATM Backbone

SwitchModule

You can reset the ATM Backbone SwitchModule by either pressing the

front panel Reset button or issuing the DMM Reset co mmand.

CAUTION: If you reset the ATM Backbone SwitchModule using the

DMM RESET command, the module does not lose saved setup

information. However, performing a reset may cause some of the data

being transmitted at that moment to be lost and statistic counters to

be reset tozero.

Using the Reset

Button

Each ATM Backbone SwitchModule front panel houses a R eset button.

The Reset button resets the ATM Backbone SwitchModule and executes

power up self-test diagnostics.

CAUTION: Use the Reset button only if you suspect a problem with the

ATM Backbone SwitchModule. Using the Reset button to reset an ATM

Backbone SwitchModule disrupts networ k traffic.

To ensure that you do not lose any configuration information, before

you use the Reset button:

■Save any configuration changes

■Wait at least 30 seconds after saving configuration changes

Contents

Main 3Com Corporation 5400 Bayfront Plaza Santa Clara, California 95052-8145 C A BOUT T HIS G 1 2 3 4 5 S 6 A B F Page T ABLES Page ABOUT THIS GUIDE Introduction Audience How to Use This Guide Conventions Table 1 Notice Icons Table 2 Text Conventions Related Documents Page Page Page 1 ATM Backbone SwitchModule Overview Page Page ATM Backbone SwitchModule Architecture Page ATM Backbone SwitchModule Descriptions Page PacketChannel Backplane Description Tabl e 1- 2 SwitchModule Installation Per Backplane (continued) Sample ATM Backbone SwitchModule Configurations Page Page Page Page 2 General Definition of LAN Emulation Page LAN Emulation Components Page LAN Emulation Data Exchange 2-6 CHAPTER 2: LAN EMULATION OVERVIEW Figure2- 6 Converting SwitchModule Packets to and from ATM Cells LAN Emulation Connections Page LAN Emulation Operation Page Page Page 3 B ACKBONE SWITCH M Configuration Tools Page Page Page Setting Up DMM Access Configuration Process Overview Page Configuring LAN Emulation Parameters Configuring ATM OC-3 Card Redundancy Configuring IGMP Snooping Parameters Page Page 4 S Using DMM/ADMM Commands Page Page Page Page Page Page Page Page Page Page ATM Tr affi c Description Page BPORT_LEC Configuration Page Page Page SHOW SONET Statistics The following command displays SONET statistics for an ATM Backbone SwitchModule in slot 7: Page Using Graphical Interface Tools Page Page 5 PROTOC OL (IGMP) SNOOPI NG Overview Page Page Page Page CoreBuilder 5000 Support Locating Multicast Routers in the Network No Multicast Routers on the Network Enabling IGMP Snooping on CoreBuilder 5000 SwitchModules 5-8 CHAPTER 5: INTERNET GROUP MANAGEMENT PROTOCOL (IGMP) SNOOPING Figure 5-4 shows a typical FTE DRAM address forwarding entry. Allowed Port Map Unused FTE Address Forwarding Entry When IGMP Multicast Bit is Enabled FTE Address Forwarding Entry When IGMP Multicast Bit is Disabled Figure5- 4 FTE DRAM Address Forwarding Entry 6 Troubleshooting Using LEDs Page Tabl e 6- 2 Base Module LED Corrective Actions Troubleshooting ATM OC-3 Card LEDs Tabl e 6- 3 ATM OC-3 Card LED Corrective Actions Recovering from Problems Page Page Page Page Page Page Resetting the ATM Backbone Obtaining Technical Assistance Page A Environmental Specifications Mechanical Specifications Page B ECHNICAL SUPPORT Online Technical Services Page Support from Your Network Supplier Support from 3Com B-4 APPENDIX B: TECHNICAL SUPPORT When you contact 3Com for assistance, ha ve the following information ready: Here is a list of worldwide technical telephone suppo rt numbers: Europe, South Africa, and MiddleEast From the following countries, you may use the toll-freenumbers: (1 800 638 3266) Enterprise Customer s: 1 800 876-3266 Returning Products for Repair Page I Numbers A B C H I L M N T U V W Page 3Com Corporation LIMITED WARRANTY CoreBuilder 5000 ATM Backbone SwitchModule H S L IMITATION OF L D G OVERNING L