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CX11x, CX31x, CX710 (Earlier Than V6.03), and CX91x Series Switch Modules V100R001C10 Configuration Guide 12

The documents describe the configuration of various services supported by the CX11x&CX31x&CX91x series switch modules The description covers configuration examples and function configurations.
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Common Configuration Errors

Common Configuration Errors

This section describes common VLAN configuration errors.

User Terminals in the Same VLAN Cannot Ping Each Other

Fault Description

User terminals in the same VLAN cannot ping each other.

Procedure

  1. Check that the interfaces connected to the user terminals are in Up state.

    Run the display interface interface-type interface-number command in any view to check the status of the interfaces.

    • If the interface is Down, rectify the interface fault.

    • If the interface is Up, go to 2.

  2. Check whether the IP addresses of user terminals are in the same network segment.

    • If they are in different network segments, change the IP addresses of the user terminals.
    • If they are in the same network segment, go to 3

  3. Check that the MAC address entries on the Switch Module are correct.

    Run the display mac-address command on the Switch Module to check whether the MAC addresses, interfaces, and VLANs in the learned MAC address entries are correct. If the learned MAC address entries are incorrect, run the undo mac-address mac-address vlan vlan-id command on the system view to delete the current entries so that the Switch Module can learn MAC address entries again.

    After the MAC address table is updated, check the MAC address entries again.
    • If the MAC address entries are incorrect, go to 4.
    • If the MAC address entries are correct, go to 5.

  4. Check that the VLAN is properly configured.

    • Check the VLAN configuration according to the following table.

      Check Item

      Method

      Whether the VLAN has been created

      Run the display vlan vlan-id command in any view to check whether the VLAN has been created. If not, run the vlan command in system view to create the VLAN.

      Whether the interfaces are added to the VLAN

      Run the display vlan vlan-id command in any view to check whether the VLAN contains the interfaces. If not, add the interfaces to the VLAN.
      NOTE:

      If the interfaces are located on different devices, add the interfaces connecting the devices to the VLAN.

      The default type of an Switch Module interface is Access. You can run the port link-type command to change the interface type.

      • Add an access interface to the VLAN using either of the following methods:

        1. Run the port default vlan command in the interface view.
        2. Run the port command in the VLAN view.
      • Add a trunk interface to the VLAN.

        Run the port trunk allow-pass vlan command in the interface view.

      • Add a hybrid interface to the VLAN using either of the following methods:

        1. Run the port hybrid tagged vlan command in the interface view.
        2. Run the port hybrid untagged vlan command in the interface view.

      Whether connections between interfaces and user terminals are correct

      Check the connections between interfaces and user terminals according to the network plan. If any user terminal is connected to an incorrect interface, connect it to the correct interface.

      After the preceding operations, if the MAC address entries are correct, go to 5.

  5. Check whether port isolation is configured.

    Run the interface interface-type interface-number command in the system view to enter the interface view, and then run the display this command to check whether port isolation is configured on the interface.
    • If port isolation is not configured, go to 6.
    • If port isolation is configured, run the undo port-isolate enable command on the interface to disable port isolation. If the fault persists, go to 6.

  6. Check whether correct static Address Resolution Protocol (ARP) entries are configured on the user terminals. If the static ARP entries are incorrect, modify them.

VLANIF Interface Goes Down

Fault Symptom

A VLANIF interface is in Down state.

Common causes and solutions

Table 5-21 lists the common causes and solutions.

Table 5-21 Common causes and solutions

Common Cause

Solution

No interface is added to the corresponding VLAN.

Add interfaces to the corresponding VLAN.

All interfaces added to the VLAN are physically Down.

Rectify the fault. A VLANIF interface is Up as long as an interface in the corresponding VLAN is Up.

No IP address is assigned to the VLANIF interface.

Run the ip address command in the view of the VLANIF interface to assign an IP address to the VLANIF interface.

The VLANIF interface is shut down.

Run the undo shutdown (interface view) command in the view of the VLANIF interface to enable the VLANIF interface.

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Updated: 2019-08-09

Document ID: EDOC1000041694

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