Hitachi US7070447-001 Troubleshooting VLANs, Problem Cannot ping a users on a different Vlan

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Draft Level—Hitachi Confidential

VLAN Concepts

Troubleshooting VLANs

Problem: Cannot ping a user(s) on a different VLAN.

Solution: Verify the following:

￿Verify that the port(s) the user(s) is connected to has the correct VLAN number(s) assigned to it.

/VLAN/SHOW >vlan

￿Verify that you can ping the switch itself. By default, the switch is not pre-configured with an IP address. Therefore, you must enable IP and assign an address to it.

/VLAN/CONFIG >modify <vlan#> /VLAN/CONFIG >create <vlan#>

￿Verify that the user endstation(s) and the VLAN(s) on the switch are using the same subnet masks.

/VLAN/SHOW >vrouter

￿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.

/INET/SHOW >route

￿Check the Forwarding table to verify the correct MAC addresses are learned.

/VBRIDGE/SHOW >vfwt

￿Ping from the switch to the end nodes.

￿Ensure that RIP is active per VLAN.

/VLAN/CONFIG >modify <vlan#>

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 Basic ATM Concepts Chapter Troubleshooting at the Network LayerIndex Chapter Fddi ConceptsViii HS150-100-16 base model with an HS150-100-8E expansion List of FiguresViii List of Tables US7070447-001 Chapter Introduction Purpose of the Guide Basic Troubleshooting TipsHow to Contact Tech Support HIassist@hitachi.com HiSpeed Switch Troubleshooting Guide Basic Product Features Supported Chapter HiSpeed Switch What is the HiSpeed Switch?Available Configurations Total Model Mbps Uplink Upgrades To Ports TX Ports FX Ports Base model configurationsHS140/150-100 Model HS140/150-010 ModelExpansion Modules HiSpeed switch expansion modulesModule Number Mbps Mbps Base Model TX Ports FX PortsUpLink Modules Uplink modules for the HS15-010 and HS150-100Model Ports Type Base Model Observing LEDs Chapter Hardware DiagnosticsLEDs Reset ButtonModule LEDs LED statusHardware Diagnostics LEDs on FX ports RJ-45 LEDsColor Status Description Color State DescriptionFactory Switch Settings HiSpeed Memory, Boot Prom, Flash ComponentsHiSpeed Switch Troubleshooting Guide Basic Connections Chapter CablingRJ-45 Connector pin assignments Pin MDI-X Signal10BASE-TX Ports 100BASE-FX Ports 10/100BASE-TX PortsPins Signal Name Console PortConsole Port Pin Assignments Cabling HiSpeed Switch Troubleshooting Guide Chapter Fundamentals of Networking Network Media Examples of Physical Layer devices are repeaters and hubsExamples 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 Troubleshooting a Console Connection Using a Telnet SessionLogging Troubleshooting a Telnet SessionWindows 95/Windows NT HiView Switch ManagementHiView Tips UnixSnmpc Issues Troubleshooting HiViewExample MIB Compiler Reload NowagainFig2. MIB Browser SNMPTalk Issues How Spanning Tree Works Chapter Bridging Concepts Basic Bridging ConceptsUsing Spanning Tree Troubleshooting Bridging Issues To reduce the STA timer, type Vlan CLI CommandsHiSpeed Switch Troubleshooting Guide Chapter Vlan Concepts VLANs Default VLANs Multiple VLANsProblem Cannot ping a users on a different Vlan Troubleshooting VLANsDescription CLI command Vlan entry created Useful CLI CommandsVlan Tips Vlan EntriesChapter Troubleshooting at the MAC Layer Ethernet Common Ethernet Errors Physical Media SpecificationsFCS errors Alignment errorsEthernet Tips Oversized framesTo clear the buffer queues Troubleshooting EthernetDisplays all port speeds, duplexity HiSpeed Switch Troubleshooting GUide Class Range Subnet Mask IP address classesRIP Routing Information Protocol Other IP-related ServicesDefault Route Route Cache Forwarding vs. IP ForwardingStatic Routes vs. Dynamic Routes Network Unreachable Common Icmp Destination Unreachable MessagesTroubleshooting IP Problem Cannot establish a telnet session to the switch CLI CommandsVPI/VCI Chapter Basic ATM ConceptsLAN Emulation Lane Permanent Virtual Circuits vs Switched Virtual CircuitsLAN Emulation Client LEC Point-to-Point Bridging Ptop Classical IP over ATM CIPATM Ptop TrunkingATM Troubleshooting Tips Hitachi HiSpeed ATM SpecificationsTroubleshooting Lane Verify the following using /ATM/SHOW/connection Troubleshooting CIP11-9 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 Dual Ring Chapter Fddi ConceptsHiSpeed Fddi Uplink Fddi Uplink Module installed in an HS150SAS cable connections Cable ConnectionsFddi Bridge Modes LED StatesLED Status Board Status Description Yellow Green Filtering Mode Fddi Troubleshooting TipsForwarding Mode Promiscuous ModeVerify that physical port 34 is active using vvp Troubleshooting FddiProblem Cannot ping another Vlan over Fddi 12-8 Displays the Fddi MAC Neighbor address table 12-10 Index 71$E54 C1=5.2 ?U?B*,8

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