Troubleshooting tools, Problem resolution, Ping | IBM L2/3 manual

9.3.7 Problem resolution

Document the problem and resolution for future reference.

9.4 Troubleshooting tools

This section lists troubleshooting tools for your use.

Ping

This tool, also known as the Packet INternet Groper, allows you to check connectivity between network devices. This tool is included with Windows, all variants of UNIX, and is also available on many network device CLIs.

Traceroute

Traceroute records the route through the Internet between your computer and a specified destination computer. If there is a loss of connectivity between the devices, this tool may help in identifying the location of the break in connectivity. This tool is included with Windows, all variants of UNIX, and is also available on many network device CLIs.

Telnet/SSH

Telnet/SSH allows you to connect to device command line interfaces. It is also useful in checking whether a device is listening on a specific port, for example:

> telnet 192.168.1.1 80

Telnet is included with Windows, all variants of UNIX, and is also available on many network device CLIs.

Tools for Windows are:

–Telnet

–TeraTerm

–SecureCRT

Tools for Linux are:

–Telnet

–SSH

Note: A basic Telnet client is included with Windows.

TeraTerm (http://www.tucows.com) is a freeware Telnet client and serial communications application. Thus, you can also use it to configure a network device using the serial port of the client station.

SecureCRT is a commercial Telnet and SSH client.

Linux includes text-based Telnet and SSH clients.

Chapter 9. Nortel Networks Layer 2/3 GbE Switch Module troubleshooting

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IBM L2/3 manual Troubleshooting tools, Problem resolution, Ping, Traceroute, Telnet/SSH

Contents

Redpaper Page International Technical Support Organization First Edition September Contents Page Troubleshooting tools Page Vii Trademarks Team that wrote this Redpaper Preface IBM RTP Become a published author Comments welcome Page Executive summary Page IBM Eserver BladeCenter overview IBM Eserver BladeCenter product family IBM Eserver BladeCenter and blade modules IBM Eserver BladeCenter storage solutions IBM Eserver BladeCenter system management IBM Eserver BladeCenter architectureMidplane IBM BladeCenter Midplane Management Module Ethernet interface Management Module Ethernet Gigabit Ethernet path Gigabit Ethernet path IBM Eserver HS20 architecture PXH-D Stand-alone configuration tools Web interface Page Nortel Networks Layer 2/3 GbE Switch Modules Nortel Networks L2/3 GbESM connections Product description Nortel Networks Layer 2/3 GbE Switch Modules Competitive advantage Leadership features and functionValue proposition Product strength Product shipment group Supported hardwareSupported platforms Page Nortel Networks Layer 2/3 GbE Switch Module architecture Nortel Networks L2/3 GbESM architecture overview Nortel GbESM architecture overview GbESM2 Nortel Networks L2/3 GbESM block diagram Nortel Networks L2/3 GbESM block diagram Connections on the Nortel GbESM Nortel Networks L2/3 GbESM ports specific roles INT1 Nortel Networks Layer 2/3 GbE Switch Module architecture Page Nortel Networks L2/3 GbESM management and administration Management paths to the Nortel Networks L2/3 GbESM Nortel Networks L2/3 GbESM management connectivity Management Module Path Out-of-band management Serial port Path In-band managementExternal Ethernet ports Path 3A In-band management considerations Internal Ethernet ports Path 3B IBM Eserver BladeCenter Management Module and I2C Command-line interfaceMain Menu commands Nortel Networks L2/3 GbESM user interface CLI Main Menu Global commands Configuration control commands Navigation commandsAdditional commands Upgrading the firmware Display of a firmware update using CLI Example 5-1 Example configuration file dump Capturing the current configuration Description of default user accounts Configuring user accounts Browser Based Interface Snmp management IBM Director Switch information using BBI Multiple Nortel Networks L2/3 GbESMs in a BladeCenter IBM Eserver BladeCenter system initial setup Management Module firmware IBM Eserver BladeCenter system Management Module network interface Accessing the Management Module Web interfaceEstablishing a physical connection to the Management Module Management Module External Network Interface window Configuring the Management Module network interfaces 3 I/O module management tasks Nortel Networks L2/3 GbESM setup and configuration I/O Module Tasks Management advanced setup Nortel Networks L2/3 GbESM firmware download Determining the level of Nortel switch software Firmware update Blade server initial configurationUpdateXpress Firmware update Operating systems Microsoft Windows 2003 Broadcom driver installation Red Hat Linux Broadcom driver installation Broadcom Advanced Control Suite installation Select Control Suite and Basp Firmware and device drivers used in this example Page Copyright IBM Corp . All rights reserved Spanning Tree 802.1D, 802.1w, 802.1s Standards and technologiesVlan tagging 802.1Q Link Aggregation and Lacp 802.3ad Open Shortest Path First Ospf RFC1257, RFC2328, and others Routing Information Protocol RFC1058 and RFC2453 Virtual Router Redundancy Protocol Vrrp RFC Summary of sample configurationsWhere standards originate and how to get them Basic Layer 2 configuration Layer 3 configuration static routing Advanced Layer 2 configurationsLayer 3 configurations dynamic routing Introduction to High Availability ConfigurationIntroduction to trunk failover What trunk failover can protect against Introduction to NIC Teaming Vrrp Priority Introduction to Vrrp Cable type selection cross-over or straight-through Guidelines for attaching the BladeCenter to a networkSome important rules for ensuring High Availability Guidelines and comments Fiber connections Base configurations for examples in this documentIBM Eserver BladeCenter configuration Hardware and software used for lab environment Additional hardware used during the experiments Preconfiguration preparationCisco 3560G switch Nortel Networks L2/3 GbESM IP address and Vlan scheme Base configuration common to all examplesManagement Module settings for Nortel GbESMs Blade server configuration with Basp Basic Layer 2 entry topology Blade server 2 Basp configuration Layer 2 configuration with 802.1Q tagging and trunk failover Example 7-2 Verifying the Vlan setup Cisco 3560G switch configurationExample 7-1 Create the VLANs and IP interfaces first Example 7-3 Create IP addresses Said MTU Example 7-4 Links Nortel Networks L2/3 GbESM switch configuration Example 7-6 PVIDs set Example 7-7 Verifying the Vlan setup of the Nortel GbESM Example 7-7shows what has been configured so far Complete configuration snapshots Re-enable the ports INT2 INT3 EXT1 EXT2 Page Page Basic topology conclusions Advanced Layer 2 topology sample configurations 0.0 G0/24 Cisco 3560G G0/23 Core Dynamic link aggregation Ieee 802.3ad Lacp Port EXT5 tag ena pvid Port EXT6 tag ena pvid Configure the Cisco Core1 and Core2 for tagged Lacp trunks Common Spanning Tree configuration Ieee 802.1D and PvstVerify the Lacp trunk status Enter apply to execute the configuration changes Verify the Spanning Tree status Reenable the portsExample 7-11 Verifying port status and Vlan assignment Example 7-12 Verifying the Spanning Tree status 300 Ffff-0011f936b700 8004 Design or topology remarks Full configuration snapshots Def INT1 INT2 INT3 EXT1 EXT2 EXT5 EXT6 on GbESM2 Page Page Page Rapid Spanning Tree Ieee 802.1w Configure the Cisco Core1 and Core2 for Rapid-PVST Design remarks Full configuration snapshots Def INT1 INT2 INT3 EXT1 EXT2 EXT5 EXT6 on GbESM2 Page Page Multi-Spanning Tree Ieee 802.1s Configurations for use of MST Example 7-17 Mstp Information Display GbESM Key configuration commands to verify Mstp FWD Example 7-18 Mstp Information Display Cisco Example 7-19 Sample Mstp Configuration GbESMPage Example 7-20 Sample Mstp Configuration Cisco Page Implications of using Layer Layer 3 topology sample configurations Reasons for choosing a Layer 3 design Layer 3 sample configuration with static routing and Vrrp Merits of this configuration Summary of IP Addressing used in this sample Layer 3 sample configuration static routing, Vrrp Example 7-21 Layer 3 VLANs and ports for GbESM switches Configure VLANs and subnets for the uplink portsPage Configuration for Core1 address Example 7-22 Layer 3 VLANs and ports for Core switches Example 7-23 Vrrp Configuration for GbESMs Vrrp configuration Example 7-24 Vrrp Hot-standby configuration Configuration of Hot-standby for Vrrp Verifying operation of the configuration Reconnect procedure when configuration is ready Name Example 7-26 Verifying Vrrp status INT2 INT3 EXT3 Page Page Page Page Dynamic routing options OSPF/RIP 2summarizes the IP addresses in use. -7also shows these Configure additional VLANs and subnets for the uplink ports Page Example 7-30 Additional VLANs and Subnets Core switches Example 7-32 RIP configuration for the Core switches Configuring RIPConfiguring Ospf Example 7-31 RIP configuration for the GbESMs Example 7-36 GbESM commands to verify RIP Verifying operation of this configurationExample 7-34 Configuration for Core switch Example 7-35 Configuration for Core switch Example 7-37 Cisco commands to verify RIP RIP User Configuration Example 7-38 GbESM commands to verify Ospf GbESM commands to verify OspfPage Ospf Example 7-39 Cisco commands to verify Ospf Cisco commands to verify Ospf Userid L3/vrrp/on /c/l3/vrrp/vr Page Page Page Page Example 7-42 Extreme switch configuration Configuration for Extreme switchesPage Page Page Page Page Page Page Serial over LAN feature description and configuration General rules to establish an SOL connection SOL overview SOL use during Nortel Networks L2/3 GbESM experiments Configuring SOL for use with the Nortel GbESMPage Nortel Networks Layer 2/3 GbE Switch Module troubleshooting Basic rules Basic rules and unique symptoms General comments on troubleshooting Nortel Networks L2/3 GbESM troubleshooting methodology Systematic approach Problem definition Details from affected users Nortel GbESM Alteon OS switch dumpsData collection Test connectivity Observation of results Data analysisAction plan creation Action plan implementation Traceroute Troubleshooting toolsProblem resolution Ping Tftp server Difference toolSyslog server Protocol analyzer Web load generator GbE Switch software images GbE Switch documentsNetwork monitors or management systems Service and support Placing a call to IBM Online servicesOrdering information Listed here are other helpful Web sites Other support sitesPage Abbreviations and acronyms Pvid Other publications IBM RedbooksOnline resources Page Help from IBM How to get IBM RedbooksPage Page Nortel Networks L2/3