Hitachi US7070447-001 manual Other IP-related Services, RIP Routing Information Protocol

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Draft Level—Hitachi Confidential

HiSpeed Switch Troubleshooting Guide

Other IP-related Services

The HiSpeed switch supports the following IP-related functions:

Address Resolution Protocol (ARP)

Used to resolve an IP to MAC address allowing devices to communicate at the Data Link layer. The HiSpeed switch maintains an ARP table of IP to MAC address mappings.

Internet Control Message Protocol (ICMP)

Provides a mechanism allowing a device to report an error back to the original source. Ping packets which employ ICMP, are used to determine whether a device is reachable across the network.

TCP (Transmission Control Protocol)

Used by applications requiring a reliable transport mechanism for communicating between devices across the network. Examples of network applications using TCP are: Telnet, FTP, SMTP.

UDP (User Datagram Protocol)

Used by applications that do not require a reliable transport mechanism for communicating between devices across the network. Examples of network applications using 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. If more than one path exists with the same metric, the switch will choose whichever path it first learns.

An internal Routing table based on network address, gateway, metric, VLAN, and Interface type is built and maintained on the HiSpeed switch. These routes are propagated across the network via RIP every 30 seconds. Without RIP updates, dynamic routes age out after 180 seconds. The maximum number of RIP entries supported on the HiSpeed switch is 512.

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US7070447-001, Rev 01

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Contents Troubleshooting Guide #&$$% Table of Contents Chapter Methods of Managing the Switch Chapter CablingChapter Fundamentals of Networking Chapter Troubleshooting at the MAC Layer Chapter Bridging ConceptsChapter Vlan Concepts Chapter Troubleshooting at the Network Layer Chapter Basic ATM ConceptsChapter Fddi Concepts IndexViii List of Figures HS150-100-16 base model with an HS150-100-8E expansionViii List of Tables US7070447-001 Basic Troubleshooting Tips Chapter Introduction Purpose of the GuideHow to Contact Tech Support HIassist@hitachi.com HiSpeed Switch Troubleshooting Guide Chapter HiSpeed Switch What is the HiSpeed Switch? Basic Product Features SupportedAvailable Configurations Base model configurations Total Model Mbps Uplink Upgrades To Ports TX Ports FX PortsHS140/150-010 Model HS140/150-100 ModelModule Number Mbps HiSpeed switch expansion modulesExpansion Modules Mbps Base Model TX Ports FX PortsUpLink Modules Uplink modules for the HS15-010 and HS150-100Model Ports Type Base Model Chapter Hardware Diagnostics Observing LEDsModule LEDs Reset ButtonLEDs LED statusHardware Diagnostics Color Status Description RJ-45 LEDsLEDs on FX ports Color State DescriptionHiSpeed Memory, Boot Prom, Flash Components Factory Switch SettingsHiSpeed Switch Troubleshooting Guide Chapter Cabling Basic ConnectionsRJ-45 Connector pin assignments Pin MDI-X Signal10BASE-TX Ports 10/100BASE-TX Ports 100BASE-FX PortsPins Signal Name Console PortConsole Port Pin Assignments Cabling HiSpeed Switch Troubleshooting Guide Chapter Fundamentals of Networking Examples of Physical Layer devices are repeaters and hubs Network MediaExamples of Layer 2 devices are bridges and switches HiSpeed Switch Troubleshooting GUide Chapter Methods of Managing the Switch CLI Command Line InterfaceUsing the Console Port Using a Telnet Session Troubleshooting a Console ConnectionTroubleshooting a Telnet Session LoggingHiView Switch Management Windows 95/Windows NTUnix HiView TipsTroubleshooting HiView Snmpc IssuesExample Reload Nowagain MIB CompilerFig2. MIB Browser SNMPTalk Issues Chapter Bridging Concepts Basic Bridging Concepts How Spanning Tree WorksUsing Spanning Tree Troubleshooting Bridging Issues To reduce the STA timer, type CLI Commands VlanHiSpeed Switch Troubleshooting Guide Chapter Vlan Concepts Default VLANs Multiple VLANs VLANsTroubleshooting VLANs Problem Cannot ping a users on a different VlanVlan Tips Useful CLI CommandsDescription CLI command Vlan entry created Vlan EntriesChapter Troubleshooting at the MAC Layer Ethernet Physical Media Specifications Common Ethernet ErrorsEthernet Tips Alignment errorsFCS errors Oversized framesTroubleshooting Ethernet To clear the buffer queuesDisplays all port speeds, duplexity HiSpeed Switch Troubleshooting GUide IP address classes Class Range Subnet MaskOther IP-related Services RIP Routing Information ProtocolDefault Route Route Cache Forwarding vs. IP ForwardingStatic Routes vs. Dynamic Routes Common Icmp Destination Unreachable Messages Network UnreachableTroubleshooting IP CLI Commands Problem Cannot establish a telnet session to the switchChapter Basic ATM Concepts VPI/VCIPermanent Virtual Circuits vs Switched Virtual Circuits LAN Emulation LaneLAN Emulation Client LEC Classical IP over ATM CIP Point-to-Point Bridging PtopTrunking ATM PtopHitachi HiSpeed ATM Specifications ATM Troubleshooting TipsTroubleshooting Lane Troubleshooting CIP Verify the following using /ATM/SHOW/connection11-9 Troubleshooting Ptop Verify signaling and Ilmi status should be ‘up’ Troubleshooting Trunking Verify all ATM Trunk ports are in a ‘Forwarding’ state using Displays all active ATM circuits Chapter Fddi Concepts Dual RingFddi Uplink Module installed in an HS150 HiSpeed Fddi UplinkCable Connections SAS cable connectionsFddi Bridge Modes LED StatesLED Status Board Status Description Yellow Green Forwarding Mode Fddi Troubleshooting TipsFiltering Mode Promiscuous ModeTroubleshooting Fddi Verify that physical port 34 is active using vvpProblem Cannot ping another Vlan over Fddi 12-8 Displays the Fddi MAC Neighbor address table 12-10 71$ IndexE54 C1=5.2 ?U?B*,8

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