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Checking the network

Before setting up a disaster recovery vFiler unit, you must check whether the source and destination storage systems are on the same subnet, the IPspace used by the vFiler unit, and whether the destination vFiler unit can access the same NIS and DNS servers as the source vFiler unit.

Steps

  1. Check whether the destination vFiler unit can take over the source vFiler unit’s IP addresses by displaying information about all the network interfaces of the destination vFiler unit.

    You must use the ifconfig -a command on the source vFiler unit and the destination storage system to display information about all the network interfaces.

    You can reuse the source IP addresses and aliases on the destination vFiler unit if the destination vFiler unit is on the same subnet as the source vFiler unit.

  2. Depending on the result of Step 1, perform one of the following actions:
    If the source and destination storage systems... Then...
    Are on the same subnet
    Note: This is the default for the vfiler migrate command.
    Go to Step 3.
    Are on different subnets
    1. Obtain all new IP addresses that are in use on the source vFiler unit for the destination vFiler unit.
      Note: You might need to replicate subnet-separation arrangements that exist on the source vFiler unit. For example, the source vFiler unit might use one IP address for a service network and another for an administration network.
    2. Make a note of the new IP addresses on a worksheet.

      The vfiler dr configure command prompts you for these addresses when you create the disaster recovery vFiler unit.

      The vfiler migrate command also prompts you for these addresses, but you might then need to run the setup command on the destination vFiler unit.

  3. Check whether the source vFiler unit is using the default IPspace.

    To display information about IPspaces and the interfaces assigned to them, you must use the ipspace list command on the source vFiler unit.

  4. Depending on the result of Step 3, perform one of the following actions:
    If the ipspace list command reports... Then...
    Default-ipspace Go to Step 5.
    Something other than default-ipspace
    1. Use the ipspace create command to create a corresponding IPspace with the same name on the destination storage system.
    2. Use the ipspace assign command to assign physical interfaces to the IPspace.

      These interfaces should be attached to the same physical network.

  5. Check whether the destination vFiler unit has access to the same NIS servers as the source.

    Note: You can skip this check if the source and destination vFiler units are on the same subnet.
    To see the NIS servers that are available to the source vFiler unit, use the nis info command.
    Note: The ypwhich command shows the server to which the storage system is currently bound.

  6. Depending on the result of Step 5, perform one of the following actions:
    If... Then...
    The destination vFiler unit can use the same NIS servers as the source vFiler unit
    Note: This is the default for the vfiler migrate command.
    Go to Step 7.
    The destination vFiler unit cannot use the same NIS servers
    1. Find the NIS servers that are available for the destination storage system.
    2. Make a note of the IP addresses of those servers on the network checklist.

    The vfiler dr configure command prompts you for these addresses when you create the disaster recovery vFiler unit.

    The vfiler migrate command does not prompt you for these addresses. If you move a vFiler unit to a different subnet, you might need to run the setup command on the destination vFiler unit.

  7. Check whether the destination vFiler unit has access to the same DNS servers as the source.

    Note: You can skip this check if the source and destination vFiler units are on the same subnet.

    To see what DNS servers are available to the source vFiler unit, use the dns info on command.

  8. Depending on the result of Step 7, perform one of the following actions:
    If... Then...
    The destination vFiler unit can use the same DNS servers as the source vFiler unit
    Note: This is the default for the vfiler migrate command.
    Go to Step 9.
    The destination vFiler unit cannot use the same DNS servers
    1. Find the DNS servers that are available for the destination storage system.
    2. Make a note of the IP addresses of those servers on a worksheet.

    The vfiler dr configure command prompts you for these addresses.

    The vfiler migrate command does not prompt you for these addresses. If you move a vFiler unit to a different subnet, you might need to run the setup command on the destination vFiler unit.

  9. Check whether the destination vFiler unit has access to the same WINS servers and the same Windows security network as the source.
  10. Depending on the result of Step 9, perform one of the following actions:
    If the destination vFiler unit... Then...
    Can use the same WINS servers and Windows security network as the source vFiler unit Go to Step 11.
    Cannot use the same WINS servers and Windows security network
    1. Find the name and type (Windows NT 4 or Windows 2000) of the domain the destination vFiler unit is in.
    2. Note this information on the network checklist.

    When you activate the disaster recovery vFiler unit, you have to configure it into the new domain.

    If you move a vFiler unit into a different domain, you have to configure it into the new domain.

  11. Check whether the destination vFiler unit can use the same trusted host for vFiler unit administration as the source vFiler unit.
  12. Depending on the result of Step 11, perform one of the following actions:
    If the destination vFiler unit... Then...
    Can use the same trusted host as the source vFiler unit You have completed this task.
    Cannot use the same trusted host
    1. Find the name of the new trusted host.
    2. Note this information on the network checklist.

    You must configure the new trusted-host information after configuring the disaster recovery vFiler unit, or after moving the vFiler unit.