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Hitachi US7070447-001 Troubleshooting Manual

Hispeed fast ethernet switch


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HiSpeed Fast Ethernet Switch
Troubleshooting Guide
Part No. US7070447-001, Rev 01


Table of Contents

Summary of Contents for Hitachi US7070447-001

  • Page 1 HiSpeed Fast Ethernet Switch Troubleshooting Guide Part No. US7070447-001, Rev 01...
  • Page 2 • Type of equipment, serial number, and software version number • A description of any commands entered and the resulting output • Whether you were trying to connect to other equipment                  US7070447-001...
  • Page 3: Table Of Contents

    HS140/150-100 Model ...2-4 Expansion Modules ...2-5 UpLink Modules ...2-6 Chapter 3 Hardware Diagnostics Observing LEDs ...3-1 Reset Button ...3-2 LEDs ...3-2 Reset Button ...3-3 HiSpeed Memory, Boot Prom, Flash Components ...3-5 Factory Switch Settings ...3-5 US7070447-001 Rev 01 Table of Contents...
  • Page 4 Methods of Managing the Switch CLI (Command Line Interface) ...6-1 Using the Console Port ...6-1 Troubleshooting a Console Connection ...6-2 Using a Telnet Session ...6-2 Troubleshooting a Telnet Session ...6-3 Logging In ...6-3 Troubleshooting the Login Procedure ...6-3 US7070447-001 Rev 01...
  • Page 5 UNIX ...6-5 HiView Tips ...6-5 Windows 95/NT 4.0 ...6-5 HiView Tips ...6-5 UNIX ...6-5 Troubleshooting HiView ...6-6 Troubleshooting Network Management software on the HiSpeed switch ...6-6 SNMPC Issues ...6-6 EXAMPLE: 6-7 MeterWare Issues ...6-7 SNMPTalk Issues ...6-10 Chapter 7 Bridging Concepts Basic Bridging Concepts ...7-1...
  • Page 6 Broadcast and Unknown Server (BUS) ... 11-3 Classical IP over ATM (CIP) ... 11-4 Point-to-Point Bridging (PTOP) ... 11-4 Trunking ... 11-5 Hitachi HiSpeed ATM Specifications ... 11-6 ATM Troubleshooting Tips ... 11-6 Troubleshooting LANE ... 11-7 Troubleshooting CIP ... 11-8 Troubleshooting PTOP ...
  • Page 7 Chapter 12 FDDI Concepts HiSpeed FDDI Uplink ...12-2 Cable Connections ...12-3 Observing LEDs ...12-4 FDDI Bridge Modes ...12-4 Filtering Mode ...12-5 Forwarding Mode ...12-5 Promiscuous Mode ...12-5 FDDI Troubleshooting Tips ...12-5 Troubleshooting FDDI: ...12-6 CLI Commands ...12-9 Index US7070447-001 Rev 01...
  • Page 8 US7070447-001 Rev 01...
  • Page 9 Figure 11-5. ATM Trunk ... 11-5 Figure 12-1. HS150 on an FDDI network ...12-1 Figure 12-2. FDDI Uplink Module installed in an HS150 ...12-2 Figure 12-3. SAS cable connections ...12-3 Figure 12-4. DAS cable connections ...12-3 US7070447-001 Rev 01 List of Figures...
  • Page 10 US7070447-001 Rev 01...
  • Page 11: List Of Tables

    RJ-45 Connector pin assignments ...4-2 Table 4-2. Console Port Pin Assignments ...4-4 Table 8-1. VLAN Entries ...8-4 Table 8-2. Useful CLI Commands ...8-4 Table 10-1. IP address classes ...10-1 Table 12-1. LED States ...12-4 US7070447-001 Rev 01 List of Tables...
  • Page 12 US7070447-001 Rev 01...
  • Page 13: Introduction

    Additionally, the guide allows users to gain a better understanding of the Hitachi’s HiSpeed switch functionality, features, and performance. Note: This guide is not intended to replace any of the HiSpeed User and Installation Guides.
  • Page 14: How To Contact Tech Support

    Is the problem consistent or intermittent? Can the users ping themselves? If so, can they ping the gateway and beyond? Have you tried resetting the switch? How to Contact Tech Support For technical support, contact Hitachi’s Internetworking Solution Center: Hours: Phone: Fax:...
  • Page 15 Refer to dispcfg.doc for instructions on how to run the batch program. Forward the results to Hitachi’s Technical Support Team via the WEB or email.
  • Page 16 Draft Level—Hitachi Confidential HiSpeed Switch Troubleshooting Guide US7070447-001, Rev 01...
  • Page 17: Hispeed Switch

    What is the HiSpeed Switch? The HiSpeed switch is a multiprotocol, Fast Ethernet workgroup switch than can be configured for up to 32 10/100 Mbps LAN switch ports, depending on the model. The HiSpeed switch maximizes performance in existing shared media LANs by allowing up to 32 separate collision domains on a per port basis.
  • Page 18: Available Configurations

    Provides a service port for console connection to locally or remotely configure and manage the switch Available Configurations The HiSpeed switch is available from the factory fully or partially populated. The expansion slot on the switch provides for field customization to meet the changing needs of the network.
  • Page 19: Table 2-1. Base Model Configurations

    The expansion modules can be installed in the field or at the factory prior to shipment. The HS150 switch models also have a PCI bus for the addition of an uplink module. The uplink module provides a dedicated connection to a server or network backbone.
  • Page 20: Hs140/150-010 Model

    The expansion slot is capable of accepting an additional 16 ports for a total of 32 ports per switch. Figure 2-1 shows an HS140-010 switch model with the expansion slot populated by an HS-150-010-16E (12 10BASE-T ports and four 10/100BASE-TX ports) expansion module and no uplink capability.
  • Page 21: Expansion Modules

    Table 2-2 lists the available expansion modules. Table 2-2. Module Number HS150-010-16-E HS150-100-8-E HS150-100-8-FXE US7070447-001, Rev 01 10/100 BASE-T 10/100 BASE-T HS150-100-16 base model with an HS150-100-8E expansion module installed HiSpeed switch expansion modules...
  • Page 22: Uplink Modules

    Table 2-3. Model HS150-ATM-UL HS150-FDDI-UL HS150-FR-UL Uplink modules for the HS15-010 and HS150-100 Ports Type Base Model Fiber Optic ATM LANE uplink module DAS/SAS Fiber Optic FDDI uplink module X.25 Frame Relay/X.25 uplink module Draft Level—Hitachi Confidential US7070447-001, Rev 01...
  • Page 23: Hardware Diagnostics

    I/O devices, system buses, packet switch and uplink interfaces on the switch. The ISD software ( Hitachi anonymous FTP server, If you are using a browser, type in the following URLs to download the files:
  • Page 24: Reset Button

    Figure 3-1. Reset Button The Reset button, located on the front panel of the switch, allows you to manually recycle power and reset the switch. Pressing the Reset button initiates a warm boot of the system and generates power-on self test (POST) and diagnostics. The button is recessed into the unit to prevent accidental resets.
  • Page 25: Reset Button

    Reset Button The Reset button, located on the front panel of the switch, allows you to manually recycle power and reset the switch. Pressing the Reset button initiates a warm boot of the system and generates power-on self test (POST) and diagnostics. The button is recessed into the unit to prevent accidental resets.
  • Page 26: Table 3-2. Rj-45 Leds

    No transmission on port Currently not supported on FX ports. Indicates good link with attached device Indicates link to attached device is intermittent. Check cabling. Indicates there is not link with attached device. Check cabling. Used by support. US7070447-001, Rev 01...
  • Page 27: Hispeed Memory, Boot Prom, Flash Components

    To perform any routing and network management to the switch, you must assign an IP address to a VLAN on the switch. Otherwise, the switch will only provide core switching functionality. The factory default settings on the...
  • Page 28 HiSpeed Switch Troubleshooting Guide Ethernet port settings: autonegotiation is ON Spanning Tree is enabled These settings provide for switching in a single broadcast domain. Draft Level—Hitachi Confidential US7070447-001, Rev 01...
  • Page 29: Cabling

    The HiSpeed switch models are similar in physical makeup of ports and LEDs. This section describes the following port types, LED configurations, and connections for all models. 10BASE-TX ports 10/100BASE-TX ports 100BASE-FX ports Console connection Reset button Basic Connections For communications to take place between two devices, the transmitter of one device must connect to the receiver of the other device.
  • Page 30 10BASE-TX Ports The 10BASE-T port connections are provided for the 10 Mbps Ethernet segment or nodes to attach to the HiSpeed switch. The RJ-45 jacks accept standard Category 3, 4, or 5 copper unshielded twisted pair (UTP) cable connections. Pin assignments for the standard RJ-45 connector are given in Table 4-1.
  • Page 31: 100Base-Fx Ports

    Point-to-point network connections, such as DTE-to-switch ports, allow a file server to transmit frames to a switch while simultaneously receiving frames from the same switch. This two-way, non-CSMA/CD full-duplex communication allows an effective bandwidth of 200 Mbps between two devices.
  • Page 32: Console Port

    Console Port The console port has a DB-9 male connector used to connect a management terminal to the switch by means of a straight-through DB-9 to DB-9 standard serial port cable. Using a terminal, you can monitor the results of startup self-diagnostics, perform manual boot configuration and SNMP agent configuration, and customize your network using the supplied menus and screens.
  • Page 33 Draft Level—Hitachi Confidential Cabling to view and configure the console parameters. For information on these commands, refer to the HiSpeed Switch User Guide, document number US7070424-001, that was shipped with your switch. US7070447-001, Rev 01...
  • Page 34 Draft Level—Hitachi Confidential HiSpeed Switch Troubleshooting Guide US7070447-001, Rev 01...
  • Page 35: Fundamentals Of Networking

    Chapter 5 Fundamentals of Networking Today, there are many different types of computers and networking equipment available. These devices are expected to communicate with each other. For this reason, it is extremely important that a set of rules be established and implemented in order for networking devices to function well together.
  • Page 36: Layer 1: Physical Layer

    Media Access Control (MAC) and Logical Link Control (LLC). Application Presentation Session Transport Network Data Link Physical Network Media Draft Level—Hitachi Confidential Layer 7 Layer 6 Layer 5 Layer 4 Layer 3 Layer 2 Layer 1 Doc Part Number, Version Number...
  • Page 37: Layer 3: Network Layer

    Draft Level—Hitachi Confidential Fundamentals of Networking The LLC sublayer defines the logical connection to the upper layer services based on a socket or Service Access Point (SAP). This allows two processes on the same network to maintain a “logical connection” with each other for the purpose of data exchange.
  • Page 38 Draft Level—Hitachi Confidential HiSpeed Switch Troubleshooting GUide Doc Part Number, Version Number...
  • Page 39: Methods Of Managing The Switch

    Telnet session over a TCP/IP network SNMP using HiView’s Graphical User Interface (GUI) CLI (Command Line Interface) Hitachi employes a command line interface (CLI) application for configuring the HiSpeed switch. The CLI can be accessed from: Console Port Telnet session...
  • Page 40: Troubleshooting A Console Connection

    Reset the switch if it is necessary. Using a Telnet Session The switch can be accessed from a remote location by using Telnet to make a TCP connection. The Telnet command syntax depends on the type of terminal or TCP/ IP software you are using.
  • Page 41: Troubleshooting A Telnet Session

    Logging In The HiSpeed switch is shipped from the factory with pre-installed software. By default, the switch is configured to boot from flash. After the switch has been booted, the login prompt will be displayed. Log in by entering admin, in lowercase.
  • Page 42: Hiview Switch Management

    HiSpeed Switch Troubleshooting GUide HiView Switch Management The HiSpeed switch can be configured using Hitachi’s HiView graphical user interface (GUI) application. HiView uses Simple Network Management Protocol (SNMP) to communicate to the SNMP agent residing on the switch. Configurations to the switch can be made easily by simply dragging and dropping icons from one window to another.
  • Page 43: Unix

    When the HiView application has been launched for the first time, the color on all Ethernet ports is black. To distinguish between different VLANs, you must assign different colors to the VLANs. To upgrade the firmware on the switch using HiView, a third party TFTP server process must be running. HiView Tips UNIX HiView can only manage one switch at a time.
  • Page 44: Troubleshooting Hiview

    Find the IMPORTS header located at the top of the MIB file. Use a double hypen (--) to comment out the fields starting from “hicamNsgConventions MODULE-IDENTITY” to Before changing any table entry values, set the stats-field Draft Level—Hitachi Confidential Doc Part Number, Version Number...
  • Page 45: Example

    For the RMON groups to work properly, do the following: Hitachi’s vendor id must entered to recognize the switch’s MAC address. Set the device to EthernetRMON. Listed below are the steps to compile and browse Hitachi’s private MIBs with MeterWare: Launch the MeterWare program.
  • Page 46 After all MIBs have been added, click on “Reload Now.” Then click on “OK”. After initially clicking on “Reload Now”, an error message will Note: appear. Click on “Reload Now”. Ignore the error message and click on “Reload Now”again. MIB Compiler Draft Level—Hitachi Confidential Doc Part Number, Version Number...
  • Page 47 See Fig.2 below. Go to this directory : . and click on ( hicam ( nsg . Figure 6-2. Viewing Hitachi’s private MIBs requires further testing. Note: Doc Part Number, Version Number Fig2. MIB Browser Methods of Managing the Switch...
  • Page 48: Snmptalk Issues

    HiSpeed Switch Troubleshooting GUide SNMPTalk Issues For the RMON groups to work properly, the same directory as SNMPTalk. The 6-10 Draft Level—Hitachi Confidential file needs to be loaded in the mib.rt file contains all MIB information. mib.rt Doc Part Number, Version Number...
  • Page 49: Bridging Concepts

    Spanning Tree is a configuration algorithm and protocol that ensures that no data loops exist within a single broadcast domain. Figure 7-1 shows bridges 1 and 2 in a loop; in this configuration without Spanning Tree, the network is unusable US7070447-001, Rev 01 Chapter 7 Bridging Concepts...
  • Page 50 BPDU frame with the numerically lower port ID. VLAN 1 Bridge 1 VLAN 2 VLAN 3 3011 Using Spanning Tree to eliminate ata looping Using Spanning Tree Draft Level—Hitachi Confidential VLAN 1 Bridge 2 blocking not forwarding VLAN 2 Bridge 3 VLAN 3 3012 US7070447-001, Rev 01...
  • Page 51: Troubleshooting Bridging Issues

    Spanning Tree on, the ports go through the following Spanning Tree states: Listening Learning Blocking or Forwarding Troubleshooting Bridging Issues PC is moved to a different port on the switch. Users can no longer Problem: ping me Solution: Wait for Spanning Tree to stabilize completely. The default STA timer is 15 seconds for the ports to go from ‘Listening’...
  • Page 52 PCs equipped with faster processors will boot up before STA on the Solution: switch has completely stabilized. Because the ports on the switch have not gone to ‘Forwarding’, applications on the PCs may have timed out when trying to connect to the server.
  • Page 53: Cli Commands

    CLI Commands /vbridge/show/fwt /vbridge/show/filter/all /vbridge/show/bridge <vlan#> /vbridge/show/port <vlan#> /vbridge/config/bridge <vlan#> /vbridge/config/filter US7070447-001, Rev 01 Bridging Concepts Displays the bridge forwarding Table. Displays all static entries in the Bridge Forwarding Table. Displays the bridge parameters per VLAN. Displays the Spanning Tree port parameters per VLAN.
  • Page 54 Draft Level—Hitachi Confidential HiSpeed Switch Troubleshooting Guide US7070447-001, Rev 01...
  • Page 55: Vlan Concepts

    Virtual Router port is created and traffic is routed onto the VLAN via that Virtual Router port. Note: The HiSpeed switch is pre-configured with a default VLAN 1. In order to route between VLANs, you must either connect an external router to the switch or enable IP routing per VLAN.
  • Page 56 VLANs maximize the efficient use of bandwidth on any given LAN segment, since packets are forwarded only between segments as required. In addition, VLANs create smaller broadcast domains which reduce the amount of broadcast traffic across the entire network. 3009 VLANs Draft Level—Hitachi Confidential Multiple VLANs US7070447-001, Rev 01...
  • Page 57: Troubleshooting Vlans

    Verify that the gateway IP address(es) on the endstation(s) points to the IP address of the VLAN(s) it is connected to. Check the ARP table on the switch to verify if the switch is learning the endstation(s) address(es). /INET/SHOW >ARP Check the Routing table on the switch to verify that all networks are learned.
  • Page 58: Vlan Tips

    DELPORT • DIABLE • ENABLE • MODIFY • MOVPORT • REMOVE Draft Level—Hitachi Confidential VLAN entry created: Router Virtual Port id ‘33’ MAC entry with Port id ‘33’ Route entry with a directly connected VLAN Interface type US7070447-001, Rev 01...
  • Page 59: Troubleshooting At The Mac Layer

    Ethernet Ethernet is a LAN based technology with data transmission rates of 10 or 100 Mbps. CSMA/CD (Carrier Sense Multiple Access with Collision Detection) protocol dictates how Ethernet frames traverse the network. In CSMA/CD, an Ethernet station checks for the presence of a signal on the cable. If there is no signal, the station begins transmission.
  • Page 60: Physical Media Specifications

    NIC. Frames smaller than the minimum Ethernet frame size of 64 bytes a.k.a. ‘runts’. Presumed to be a fragment resulting from a collision. Draft Level—Hitachi Confidential 10BASE-FX (Fiber Optical Link) 1024 200 meters STAR 62.5/125 mm...
  • Page 61: Ethernet Tips

    FCS errors dribble bits Ethernet Tips Ensure that both port speed and duplexity on the switch and endstations are the same. By default, autonegotiation is enabled on the switch. If the endstation’s network adapter card is not autonegotiating properly, disable autonegotiation on the switch and manually configure the port settings using the following command:.
  • Page 62: Troubleshooting Ethernet

    HiSpeed Switch Troubleshooting GUide Troubleshooting Ethernet Switch is not reporting any port statistics even with traffic on my Problem: network. By default, port statistics is disabled on the switch. Solution: /ETHERNET/CONFIG >stat Note: Enabling stats may cause a slight degradation to performance on the switch.
  • Page 63: Cli Commands

    Draft Level—Hitachi Confidential CLI Commands /ETHERNET/SHOW >port /ETHERNET/SHOW >stat /ETHERNET/SHOW >count <port#> /ETHERNET/SHOW >macaddrcount /ETHERNET/CONFIG >clear <port#> /ETHERNET/CONFIG >port /ETHERNET/CONFIG/FLUSH >portflush <port#> / ETHERNET/CONFIG >stat <port#> Doc Part Number, Version Number Troubleshooting at the MAC Layer Displays all port speeds, duplexity, autonegotiation.
  • Page 64 Draft Level—Hitachi Confidential HiSpeed Switch Troubleshooting GUide Doc Part Number, Version Number...
  • Page 65: Troubleshooting At The Network Layer

    Troubleshooting at the Network Layer IP (Internet Protocol) The HiSpeed switch supports IP (Internet Protocol), a widely used Network Layer protocol used by devices to communicate across a network. IP utilizes a 32-bit address structure to identify the network and node number. The three primary classes of IP addresses are as follows: Table 10-1.
  • Page 66: Other Ip-Related Services

    UDP are: DNS, TFTP, SNMP. RIP (Routing Information Protocol) The HiSpeed switch uses RIP, version 1, to route IP packets across VLANs. RIP, a distance vector protocol, computes the best path to the destination based on the least number of hops.
  • Page 67: Route Cache Forwarding Vs. Ip Forwarding

    Route Cache Forwarding vs. IP Forwarding The HiSpeed switch provides a fast data path for forwarding IP packets called Route Cache Forwarding. Only TCP/UDP traffic over IP is supported. To forward packets at a higher speed, a cache is maintained to store IP addresses and Layer 2 information.
  • Page 68: Common Icmp Destination Unreachable Messages

    SNMP agent configured on it. Is the port process enabled or running? Find out what the port is used for and why isn’t it available. Refer to RFC 1700 for a complete list of well-known ports. 10-4 Draft Level—Hitachi Confidential US7070447-001, Rev 01...
  • Page 69: Troubleshooting Ip

    Draft Level—Hitachi Confidential Troubleshooting IP n external router is connected to my switch. I can ping the router Problem: interface on my network but cannot reach any networks beyond the router. Use the following solutions: Solution: Verify that the gateway IP address(es) on the endstation(s) points to the IP address of the VLAN(s) it is connected to.
  • Page 70: Cli Commands

    On the HiSpeed switch, use the following command: /INET/SHOW >static /INET/CONFIG/ROUTE/add Cannot establish a telnet session to the switch. Problem: The HiSpeed switch uses the well known TCP port 23 for Telnet. Verify Solution: that the socket is in a ‘Listen’ state. /INET/SHOW >iconnect: CLI Commands /INET/CONFIG/ipr /INET >ping <hostname>...
  • Page 71: Basic Atm Concepts

    One significant advantage of ATM is the ability to carry voice, video and data traffic simultaneously over a 155 megabit per second pipe. The Hitachi HiSpeed switch is an ATM edge device and provides Ethernet to ATM connections over an ATM network.
  • Page 72: Permanent Virtual Circuits Vs

    ** Valid LEC values range from 0 through 31. Figure 11-2. 11-2 LES/BUS OC-3 vci 45 vci 32 vci 67 L E C Workstation LECS Native ATM device ATM LANE Draft Level—Hitachi Confidential VLAN = ELAN LES/BUS OC-3 vci 39 vci 32 L E C US7070447-001, Rev 01...
  • Page 73: Lan Emulation Client (Lec)

    Broadcast and Unknown Server (BUS) LAN Emulation Client (LEC) The LAN Emulation Client (LEC) resides on the HiSpeed switch and acts as a proxy for devices connected to the Ethernet ports. In addition, the LEC responds to any LAN Emulation Address Resolution Protocol (LE_ARP) requests from host machines on the network.
  • Page 74: Classical Ip Over Atm (Cip)

    **To route on the same Logical IP subnet (LIS) over CIP, an external router is not required. ***When configuring PVC connections through an ATM switch, ensure the bi-directional path is established per port/interface on the ATM switch. ****CIP IP addresses must be on different subnets than those existing on the HiSpeed switches.
  • Page 75: Trunking

    **When configuring a PVC connection, ensure the VCI values are identical on the switches you are connecting to. *** When configuring PVC connections through an ATM switch, ensure the bi-directional path is established per port/interface on the ATM switch. ****Valid PTOP index ranges from 0 through 15.
  • Page 76: Hitachi Hispeed Atm Specifications

    To join a specific ELAN, an ELAN name must be defined. Ensure the same UNI signaling version is used between the ATM edge devices and the ATM switch. When manually entering the ATM address of the switch, omit the AFI prefix (Ox). Valid Trunk Indexes range from 0 through 15.
  • Page 77: Troubleshooting Lane

    If your ATM configuration is corrupt, delete your ATM file from the CLI (rm atm.cur), reset the switch, and re-configure ATM. Signaling changes may require you to reboot the switch. Troubleshooting LANE I’ve created a LEC service but still cannot connect to the ATM...
  • Page 78: Troubleshooting Cip

    ATM switch. /ATM/CONFIG/MODIFY >port If using SVC, verify that the ATM address of the ARP Server is correct. Also, verify the ARP Server is up and active on the switch you are connecting to.  Verify the following using –...
  • Page 79 However, the CIP index does not need to be the same on both switches. /ATM/SHOW >cip Verify that RIP is active for CIP and verify all routes are being learned. /ATM/SHOW >cip <cip id> /INET/SHOW >route US7070447-001, Rev 01 Basic ATM Concepts 11-9...
  • Page 80: Troubleshooting Ptop

    PTOP. ‘5’ identifies the PTOP index configured on the destination ‘2’ switch. Ensure the correct PTOP index is mapped to the switch you are trying to connect to. Draft Level—Hitachi Confidential id> US7070447-001, Rev 01...
  • Page 81 If configuring PVC, ensure the VCI values are identical on the switches you are connecting to. Verify a PVC Pt-Pt connection is created. /ATM/SHOW >connection US7070447-001, Rev 01 Verify signaling and ILMI status should be ‘up’. /ATM/SHOW >port /ATM/SHOW/connection: OAM is up.
  • Page 82: Troubleshooting Trunking

    Correct ATM address of destination switch. The last 2 selector bytes needs to be configured as follows: Example: xxx62 ‘xxx’ denotes the ATM address defined on the switch. Do a to find out what it is. ‘vap’ is a reserved identifier for Trunking.
  • Page 83 Trunk ids do not need to be the same. However, valid trunk ids range from 0 through 15. /ATM/CONFIG/MODIFY >trunk <trunk id> US7070447-001, Rev 01 /ATM/SHOW/connection: OAM is up. SSCOP, and ILMI is up. (for SVC only) A Trunk SVC or PVC connection is created per Trunk instance.
  • Page 84: Cli Commands

    - TRUNK • DISABLE> - CIP - PTOP - TRUNK Commands available in displaying ATM statistics. • AAL5 • • • CONNECTION • • PTOP • • TRUNK • Displays MAC to ATM address mappings • • US7070447-001, Rev 01...
  • Page 85: Fddi Concepts

    The total length of the ring can extend up to 200 kilometers with nodes spaced up to 2 kilometers over multimode fiber.        Figure 12-1. US7070447-001, Rev 01 Dual Ring HS 150 HS150 on an FDDI network Chapter 12 FDDI Concepts...
  • Page 86: Hispeed Fddi Uplink

    Station Management (SMT) unique to FDDI, detects, isolates, and recovers network faults on the ring. The HiSpeed switch participates in the ring recovery process as a function of SMT. Built-in timers are used by all stations to ensure timely transmission of data across the ring.
  • Page 87: Cable Connections

    Attached Station) SAS and (Dual Attached Station) DAS configuration. To FDDI Network Dual Attached Concentrator Figure 12-3. Downstream FDDI Device Figure 12-4. US7070447-001, Rev 01 SAS Cabling Port A SAS cable connections Upstream FDDI Device DAS cable connections FDDI Concepts...
  • Page 88: Observing Leds

    Table 2-1 provides information about what the LEDs mean in various states Table 12-1. LED Status Yellow Green FDDI Bridge Modes The HiSpeed switch can operate in any of the following bridging modes: Filtering Forwarding Promiscuous. The configurations can be set using the following CLI command: /FDDI/CONFIG/BRIDGE/MODE...
  • Page 89: Filtering Mode

    With FDDI Filtering, packets between FDDI-native devices are filtered at the FDDI Uplink, not at the switch’s bridging table. This method of filtering reduces the burden on the HiSpeed processor. If the FDDI ring is small and the number of native FDDI devices is limited, FDDI filtering is recommended.
  • Page 90: Troubleshooting Fddi

    Caution: It is important not to interrupt the boot up sequence during this process by either pressing the front panel Reset switch, or cycling power. Note: If the HiSpeed Switch is reset by one of these methods during either of the configuration file updates (or even possibly during the driver execution), the FLASH may become corrupted and the switch will subsequently not boot.
  • Page 91 There was a problem in the Hardware Type within the arp packet Solution: generated by the HS150. This problem was fixed with 1.4.4. Upgrade your switch the latest version of code. Refer to HiSpeed’s User Manual on further instructions on how to upgrade the switch. US7070447-001, Rev 01 command.
  • Page 92 There is currently an issue with the FDDI driver and buffer management. Solution: Engineering is actively working to resolve the problem. Please contact Hitachi’s Internetworking Solution Center for further assistance. The switch appears to hang during the boot up sequence or never Problem: reaches the login prompt.
  • Page 93: Cli Commands

    /FDDI/SHOW/PORT>counters /FDDI/SHOW/SMT>id /FDDI/SHOW/SMT>status /FDDI/SHOW/SMT>summary /FDDI/CONFIG/BRIDGE > US7070447-001, Rev 01 Displays the FDDI MAC Neighbor address table. Checks for the status of the Ring Management state, duplicate address tests, and time values. Displays the number of tx/rx frames, error frames, copied frames, and thresholds.
  • Page 94 Draft Level—Hitachi Confidential HiSpeed Switch Troubleshooting Guide 12-10 US7070447-001, Rev 01...
  • Page 95: Index

    Symbols    Numbers              US7070447-001, Rev 01       ,   Index Index-1...
  • Page 96                Index-2                US7070447-001, Rev 01...
  • Page 97           US7070447-001, Rev 01  ,           Index-3...
  • Page 98 ?  * ,<<  ?   ? < "                        =:  =:   " '            =:     "      "      8   Index-4 US7070447-001, Rev 01...

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