Cisco Nexus 7000 Series NX-OS SAN Switching Configuration Guide
IVR Topology
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IVR Topology

Information About IVR Without NAT or Autotopology

Before configuring an IVR SAN fabric without IVR in NAT mode or IVR auto topology mode, consider the following general guidelines:

  • Acquire a mandatory Enterprise License Package or SAN-EXTENSION license package and one active IPS card for this feature.
  • If you change an FSPF link cost, ensure that the FSPF path distance (the sum of the link costs on the path) of any IVR path is less than 30,000.
  • IVR-enabled VSANs can be configured when an interop mode is enabled or disabled.

Domain ID Guidelines

Before configuring domain IDs, consider the following guidelines:

  • Configure unique domain IDs across all VSANs and switches participating in IVR operations if you are not using IVR NAT. The following switches participate in IVR operations:
  • All edge switches in the edge VSANs (source and destination)
  • All switches in transit VSANs
  • Minimize the number of switches that require a domain ID assignment. This ensures minimum traffic disruption.
  • Minimize the coordination between interconnected VSANs when configuring the SAN for the first time as well as when you add each new switch.

You can configure domain IDs using one of two options:

  • Configure the allowed-domains list so that the domains in different VSANs are non-overlapping on all participating switches and VSANs.
  • Configure static, non-overlapping domains for each participating switch and VSAN.

Note
In a configuration involving IVR without NAT, if one VSAN in the IVR topology is configured with static domain IDs, then the other VSANs (edge or transit) in the topology must be configured with static domain IDs.

Transit VSAN Guidelines

Before configuring transit VSANS, consider the following guidelines:

  • Traffic between the edge VSANs only traverses through the shortest IVR path.
  • Transit VSAN information is common to all IVR zone sets. Sometimes, a transit VSAN can also act as an edge VSAN in another IVR zone.

Besides defining the IVR zone membership, you can choose to specify a set of transit VSANs to provide connectivity between two edge VSANs:

  • If two edge VSANs in an IVR zone overlap, then a transit VSAN is not required (though, not prohibited) to provide connectivity.
  • If two edge VSANs in an IVR zone do not overlap, you may need one or more transit VSANs to provide connectivity. Two edge VSANs in an IVR zone will not overlap if IVR is not enabled on a switch that is a member of both the source and destination edge VSANs.

Border Switch Guidelines

Before configuring border switches, consider the following guidelines:

  • Configure IVR only in the relevant border switches.
  • Border switches require Cisco MDS SAN-OS Release 1.3(1) or later.
  • A border switch must be a member of two or more VSANs.
  • A border switch that facilitates IVR communications must be IVR enabled.
  • IVR can also be enabled on additional border switches to provide redundant paths between active IVR zone members.
  • The VSAN topology configuration must be updated before a border switch is added or removed.

Licensing Requirements

Product License
Cisco Nexus 7000 Series. IVR requires the FCoE license for each F-series module. FCoE enabled in a storage VDC does not require the Advanced Services License.

IVR also requires the Storage Enterprise License.

For a complete explanation of the Cisco NX-OS licensing scheme and how to obtain and apply licenses, see the Cisco NX-OS Licensing Guide.

Guidelines for Manual IVR Topology

You must create the IVR topology on every IVR-enabled switch in the fabric if you have not enabled IVR auto topology mode. To use IVR manual topology mode, follow the instructions in this section.

Consider the following guidelines when using IVR manual topology mode:

  • You can configure a maximum of 128 IVR-enabled switches and 128 distinct VSANs in an IVR topology.
  • If two VSANs in an IVR topology have the same VSAN ID and different AFIDs, they count as two VSANs for the 128-VSAN limit for IVR.
  • The use of a single AFID does not allow for segmented VSANs in an inter-VSAN routing topology.

You will need to specify the IVR topology using the following information:

  • The switch WWNs of the IVR-enabled switches.
  • A minimum of two VSANs to which the IVR-enabled switch belongs.
  • The AFID, which distinguishes two VSANs that are logically and physically separate, but have the same VSAN number. You can specify up to 64 AFIDs.

Default Settings

Parameters Default
IVR feature Disabled
IVR NAT Disabled
IVR distribution Disabled
IVR Autotopology Disabled
IVR VSANs Not added to virtual domains
QoS for IVR Zones Low

Configuring Manual Topology

Manually Configuring an IVR Topology

You can manually add a switch or VSANs to an IVR topology.

Before You Begin

Use the show wwn switch command to obtain the switch WWNs of the IVR-enabled switches.

SUMMARY STEPS

    1.    ivr vsan-topology database

    2.    autonomous-fabric-id f-id switch switch-id vsan-ranges range

    3.    Repeat on all IVR-enabled switches or distribute with CFS.

    4.    ivr vsan-topology activate

    5.    (Optional) show ivr vsan-topology


DETAILED STEPS
     Command or ActionPurpose
    Step 1 ivr vsan-topology database


    Example: 
    switch(config)# ivr vsan-topology database
switch(config-ivr-topology-db)#
     

    Enters the VSAN topology database configuration mode for the IVR feature.

     
    Step 2autonomous-fabric-id f-id switch switch-id vsan-ranges range


    Example:
    switch(config-ivr-topology-db)# autonomous-fabric-id 1 switch 
20:00:00:05:30:01:1b:b8 vsan-ranges 1-2,6
     

    Configures the VSANS that participate in IVR for this switch.

     
    Step 3Repeat on all IVR-enabled switches or distribute with CFS. 

    Ensures all IVR-enabled switches have the updated IVR topology.

     
    Step 4ivr vsan-topology activate


    Example:
    switch(config)# ivr vsan-topology activate
     

    Activates the IVR topology.

    Note   

    Active IVR topologies cannot be deactivated. You can only switch to IVR auto topology mode.

     
    Step 5 show ivr vsan-topology


    Example:      		(Optional) 
    switch(config)# show ivr vsan-topology

    Displays the IVR topology.

     
    In the following example output, VSAN 2 is the transit VSAN between VSANs 1, 5, and 6.
    switch# show ivr vsan-topology
AFID  SWITCH WWN                 Active   Cfg. VSANS
--------------------------------------------------------------
   1  20:00:00:05:30:01:1b:c2 *   yes     yes  1-2
   1  20:02:00:44:22:00:4a:05     yes     yes  1-2,6
   1  20:02:00:44:22:00:4a:07     yes     yes  2-5

Total:   3 entries in active and configured IVR VSAN-Topology

Current Status: Inter-VSAN topology is ACTIVE
Last activation time: Mon Mar 24 07:19:53 2011
    What to Do Next


    Tip

    Transit VSANs are deduced based on your configuration. The IVR feature does not have an explicit transit-VSAN configuration.

    Copying the Active Topology to the Configure Topology

    You can edit a manually configured IVR topology; however, you cannot edit an active IVR topology.

    SUMMARY STEPS

      1.    ivr copy active-topology user-configured-topology


    DETAILED STEPS
       Command or ActionPurpose
      Step 1 ivr copy active-topology user-configured-topology


      Example: 
      switch# ivr copy active-topology user-configured-topology
       

      Copies the active database to the configure database so that you can edit the topology.

       

      Clearing the Manual Topology

      SUMMARY STEPS

        1.    no ivr vsan-topology database


      DETAILED STEPS
         Command or ActionPurpose
        Step 1 no ivr vsan-topology database


        Example: 
        switch(config)# no ivr vsan-topology database
         

        Clears the manually added IVR topology.

         

        Migrating from Autotopology to Manual Topology

        If you want to migrate from IVR auto topology mode to IVR manual topology mode, copy the active IVR VSAN topology database to the user-configured IVR VSAN topology database before switching modes.

        SUMMARY STEPS

          1.    ivr copy auto-topology user-configured-topology

          2.    configure terminal

          3.    ivr vsan-topology activate


        DETAILED STEPS
           Command or ActionPurpose
          Step 1ivr copy auto-topology user-configured-topology


          Example:
          switch# ivr copy auto-topology user-configured-topology
           

          Copies the automatic IVR topology database to the user-configured IVR topology.

           
          Step 2configure terminal


          Example:
          switch# configure terminal
switch(config)#
           

          Enters configuration mode.

           
          Step 3ivr vsan-topology activate


          Example:
          switch(config)# ivr vsan-topology activate
           

          Activates the IVR topology.

          Note   

          Active IVR topologies cannot be deactivated. You can only switch to IVR auto topology mode.

           

          This task disables IVR auto topology mode for the IVR topology database and enables IVR manual topology mode.

          Verifying IVR Configuration

          To display the IVR configuration, perform one of the following tasks:

          Command

          Purpose

          show ivr

          Displays the status for the IVR configuration.

          show ivr diagnostics

          Displays information about IVR diagnostics.

          show ivr merge status

          Displays information the last IVR merge event.

          show ivr pending

          Displays information about the IVR pending database.

          show ivr pending-diff

          Displays the differences between the pending database and the config database.

          show ivr vsan-topology [active | configured]

          Displays the IVR VSAN topology.

          show ivr session status

          Displays information about IVR CFS session.

          show ivr virtual-domains

          Displays information about IVR virtual domains for all local VSANs.

          show ivr zone

          Displays information about IVR zones.

          show ivr zoneset

          Displays information about IVR zone sets.

          show ivr service-group active

          		 Displays information about the active service group.
          show ivr service-group configured Displays information about the configured service group.
          show autonomous-fabric-id database Displays information about the AFIDs.
          show ivr virtual-fcdomain-add-status Displays the status of the IVR virtual domain configuration.
          Related Concepts
          Related Tasks

          Feature History

          Table 1  Feature History IVR

          Feature Name

          Releases

          Feature Information

          IVR

          5.2(1)

          This feature was introduced.