Contents

Configuring Named VSANs

This chapter includes the following sections:

Named VSANs

A named VSAN creates a connection to a specific external SAN. The VSAN isolates traffic to that external SAN, including broadcast traffic. The traffic on one named VSAN knows that the traffic on another named VSAN exists, but cannot read or access that traffic.

Like a named VLAN, the name that you assign to a VSAN ID adds a layer of abstraction that allows you to globally update all servers associated with service profiles that use the named VSAN. You do not need to reconfigure the servers individually to maintain communication with the external SAN. You can create more than one named VSAN with the same VSAN ID.

Named VSANs in Cluster Configurations

In a cluster configuration, a named VSAN can be configured to be accessible only to the Fibre Channel uplink ports on one fabric interconnect or to the Fibre Channel uplink ports on both fabric interconnects.

Named VSANs and the FCoE VLAN ID

You must configure each named VSAN with an FCoE VLAN ID. This property determines which VLAN is used for transporting the VSAN and its Fibre Channel packets.

For FIP-capable, converged network adapters, such as the Cisco UCS CNA M72KR-Q and the Cisco UCS CNA M72KR-E, the named VSAN must be configured with a named VLAN that is not the native VLAN for the FCoE VLAN ID. This configuration ensures that FCoE traffic can pass through these adapters.

In the following sample configuration, a service profile with a vNIC and vHBA mapped to fabric A is associated with a server that has FIP capable, converged network adapters:

  • The vNIC is configured to use VLAN 10.

  • VLAN 10 is also designated as the native VLAN for the vNIC.

  • The vHBA is configured to use VSAN 2.

  • Therefore, VSAN 2 cannot be configured with VLAN 10 as the FCoE VLAN ID. VSAN 2 can be mapped to any other VLAN configured on fabric A.

Fibre Channel Uplink Trunking for Named VSANs

You can configure Fibre Channel uplink trunking for the named VSANs on each fabric interconnect. If you enable trunking on a fabric interconnect, all named VSANs in a Cisco UCS domain are allowed on all Fibre Channel uplink ports on that fabric interconnect.

Guidelines and Recommendations for VSANs

The following guidelines and recommendations apply to all named VSANs, including storage VSANs.

VSAN 4079 is a Reserved VSAN ID

Do not configure a VSAN as 4079. This VSAN is reserved and cannot be used in either FC switch mode or FC end-host mode.

If you create a named VSAN with ID 4079, Cisco UCS Manager marks that VSAN with an error and raises a fault.

Reserved VSAN Range for Named VSANs in FC Switch Mode

If you plan to use FC switch mode in a Cisco UCS domain, do not configure VSANs with an ID in the range from 3040 to 4078.

VSANs in that range are not operational if the fabric interconnects are configured to operate in FC switch mode. Cisco UCS Manager marks that VSAN with an error and raises a fault.

Reserved VSAN Range for Named VSANs in FC End-Host Mode

If you plan to use FC end-host mode in a Cisco UCS domain, do not configure VSANs with an ID in the range from 3840 to 4079.

VSANs in that range are not operational if the following conditions exist in a Cisco UCS domain:

  • The fabric interconnects are configured to operate in FC end-host mode.

  • The Cisco UCS domain is configured with Fibre Channel trunking or SAN port channels.

If these configurations exist, Cisco UCS Manager does the following:

  1. Renders all VSANs with an ID in the range from 3840 to 4079 non-operational.

  2. Raises a fault against the non-operational VSANs.

  3. Transfers all non-operational VSANs to the default VSAN.

  4. Transfers all vHBAs associated with the non-operational VSANs to the default VSAN.

If you disable Fibre Channel trunking and delete any existing SAN port channels, Cisco UCS Manager returns all VSANs in the range from 3840 to 4078 to an operational state and restores any associated vHBAs back to those VSANs.

Range Restrictions for Named VSAN IDs in FC Switch Mode

If you plan to use FC switch mode in a Cisco UCS domain, do not configure VSANs in the range from 3040 to 4078.

When a fabric interconnect operating in FC switch mode is connected to MDS as the upstream switch, VSANs configured in Cisco UCS Manager in the range from 3040 to 4078 and assigned as port VSANs cannot be created in MDS. This configuration results in a possible port VSAN mismatch.

Guidelines for FCoE VLAN IDs


Note

FCoE VLANs in the SAN cloud and VLANs in the LAN cloud must have different IDs. Using the same ID for an FCoE VLAN in a VSAN and a VLAN results in a critical fault and traffic disruption for all vNICs and uplink ports using that FCoE VLAN. Ethernet traffic is dropped on any VLAN which has an ID that overlaps with an FCoE VLAN ID.

VLAN 4048 is user configurable. However, Cisco UCS Manager uses VLAN 4048 for the following default values. If you want to assign 4048 to a VLAN, you must reconfigure these values:

  • After an upgrade to Cisco UCS, Release 2.0—The FCoE storage port native VLAN uses VLAN 4048 by default. If the default FCoE VSAN was set to use VLAN 1 before the upgrade, you must change it to a VLAN ID that is not used or reserved. For example, consider changing the default to 4049 if that VLAN ID is not in use.

  • After a fresh install of Cisco UCS, Release 2.0—The FCoE VLAN for the default VSAN uses VLAN 4048 by default. The FCoE storage port native VLAN uses VLAN 4049.

Creating a Named VSAN


Note

FCoE VLANs in the SAN cloud and VLANs in the LAN cloud must have different IDs. Using the same ID for an FCoE VLAN in a VSAN and a VLAN results in a critical fault and traffic disruption for all vNICs and uplink ports using that FCoE VLAN. Ethernet traffic is dropped on any VLAN which has an ID that overlaps with an FCoE VLAN ID.

Procedure
    Step 1   In the Navigation pane, click the SAN tab.
    Step 2   On the SAN tab, expand SAN > SAN Cloud.
    Step 3   In the Work pane, click the VSANs tab.
    Step 4   On the icon bar to the right of the table, click +.

    If the + icon is disabled, click an entry in the table to enable it.

    Step 5   In the Create VSAN dialog box, complete the following fields:
    Name Description

    Name field

    The name assigned to the network.

    This name can be between 1 and 32 alphanumeric characters. You cannot use spaces or any special characters other than - (hyphen), _ (underscore), : (colon), and . (period), and you cannot change this name after the object has been saved.

    FC Zoning field

    Click the radio button to determine whether Cisco UCS Manager configures Fibre Channel zoning for the Cisco UCS domain. This can be one of the following:

    • Disabled—The upstream switch handles Fibre Channel zoning, or Fibre Channel zoning is not implemented for the Cisco UCS domain. Cisco UCS Manager does not configure Fibre Channel zoning.

    • Enabled—Cisco UCS Manager configures and controls Fibre Channel zoning for the Cisco UCS domain.

    Note   

    If you enable Fibre Channel zoning through Cisco UCS Manager, do not configure the upstream switch with any VSANs that are being used for Fibre Channel zoning.

    Type radio button

    Click the radio button to determine how the VSAN should be configured. This can be one of the following:

    • Common/Global—The VSAN maps to the same VSAN ID in all available fabrics.

    • Fabric A—The VSAN maps to the a VSAN ID that exists only in fabric A.

    • Fabric B—The VSAN maps to the a VSAN ID that exists only in fabric B.

    • Both Fabrics Configured Differently—The VSAN maps to a different VSAN ID in each available fabric. If you choose this option, Cisco UCS Manager GUI displays a VSAN ID field and a FCoE VLAN field for each fabric.

    VSAN ID field

    The unique identifier assigned to the network.

    The ID can be between 1 and 4078, or between 4080 and 4093. 4079 is a reserved VSAN ID. In addition, if you plan to use FC end-host mode, the range between 3840 to 4079 is also a reserved VSAN ID range.

    FCoE VLAN field

    The unique identifier assigned to the VLAN used for Fibre Channel connections.

    VLAN 4048 is user configurable. However, Cisco UCS Manager uses VLAN 4048 for the following default values. If you want to assign 4048 to a VLAN, you must reconfigure these values:

    • After an upgrade to Cisco UCS, Release 2.0—The FCoE storage port native VLAN uses VLAN 4048 by default. If the default FCoE VSAN was set to use VLAN 1 before the upgrade, you must change it to a VLAN ID that is not used or reserved. For example, consider changing the default to 4049 if that VLAN ID is not in use.

    • After a fresh install of Cisco UCS, Release 2.0—The FCoE VLAN for the default VSAN uses VLAN 4048 by default. The FCoE storage port native VLAN uses VLAN 4049.

    For FIP-capable, converged network adapters, such as the Cisco UCS CNA M72KR-Q and the Cisco UCS CNA M72KR-E, the named VSAN must be configured with a named VLAN that is not the native VLAN for the FCoE VLAN ID. This configuration ensures that FCoE traffic can pass through these adapters.
    Step 6   Click OK.

    Cisco UCS Manager GUI adds the VSAN to one of the following VSANs nodes:

    • The SAN Cloud > VSANs node for a storage VSAN accessible to both fabric interconnects.

    • The SAN Cloud > Fabric_Name > VSANs node for a VSAN accessible to only one fabric interconnect.

    Creating a Storage VSAN


    Note

    FCoE VLANs in the SAN cloud and VLANs in the LAN cloud must have different IDs. Using the same ID for an FCoE VLAN in a VSAN and a VLAN results in a critical fault and traffic disruption for all vNICs and uplink ports using that FCoE VLAN. Ethernet traffic is dropped on any VLAN which has an ID that overlaps with an FCoE VLAN ID.

    Procedure
      Step 1   In the Navigation pane, click the SAN tab.
      Step 2   On the SAN tab, expand SAN > Storage Cloud.
      Step 3   In the Work pane, click the VSANs tab.
      Step 4   On the icon bar to the right of the table, click +.

      If the + icon is disabled, click an entry in the table to enable it.

      Step 5   In the Create VSAN dialog box, complete the following fields:
      Name Description

      Name field

      The name assigned to the network.

      This name can be between 1 and 32 alphanumeric characters. You cannot use spaces or any special characters other than - (hyphen), _ (underscore), : (colon), and . (period), and you cannot change this name after the object has been saved.

      FC Zoning field

      Click the radio button to determine whether Cisco UCS Manager configures Fibre Channel zoning for the Cisco UCS domain. This can be one of the following:

      • Disabled—The upstream switch handles Fibre Channel zoning, or Fibre Channel zoning is not implemented for the Cisco UCS domain. Cisco UCS Manager does not configure Fibre Channel zoning.

      • Enabled—Cisco UCS Manager configures and controls Fibre Channel zoning for the Cisco UCS domain.

      Note   

      If you enable Fibre Channel zoning through Cisco UCS Manager, do not configure the upstream switch with any VSANs that are being used for Fibre Channel zoning.

      Type radio button

      Click the radio button to determine how the VSAN should be configured. This can be one of the following:

      • Common/Global—The VSAN maps to the same VSAN ID in all available fabrics.

      • Fabric A—The VSAN maps to the a VSAN ID that exists only in fabric A.

      • Fabric B—The VSAN maps to the a VSAN ID that exists only in fabric B.

      • Both Fabrics Configured Differently—The VSAN maps to a different VSAN ID in each available fabric. If you choose this option, Cisco UCS Manager GUI displays a VSAN ID field and a FCoE VLAN field for each fabric.

      VSAN ID field

      The unique identifier assigned to the network.

      The ID can be between 1 and 4078, or between 4080 and 4093. 4079 is a reserved VSAN ID. In addition, if you plan to use FC end-host mode, the range between 3840 to 4079 is also a reserved VSAN ID range.

      FCoE VLAN field

      The unique identifier assigned to the VLAN used for Fibre Channel connections.

      VLAN 4048 is user configurable. However, Cisco UCS Manager uses VLAN 4048 for the following default values. If you want to assign 4048 to a VLAN, you must reconfigure these values:

      • After an upgrade to Cisco UCS, Release 2.0—The FCoE storage port native VLAN uses VLAN 4048 by default. If the default FCoE VSAN was set to use VLAN 1 before the upgrade, you must change it to a VLAN ID that is not used or reserved. For example, consider changing the default to 4049 if that VLAN ID is not in use.

      • After a fresh install of Cisco UCS, Release 2.0—The FCoE VLAN for the default VSAN uses VLAN 4048 by default. The FCoE storage port native VLAN uses VLAN 4049.

      For FIP-capable, converged network adapters, such as the Cisco UCS CNA M72KR-Q and the Cisco UCS CNA M72KR-E, the named VSAN must be configured with a named VLAN that is not the native VLAN for the FCoE VLAN ID. This configuration ensures that FCoE traffic can pass through these adapters.
      Step 6   Click OK.

      Cisco UCS Manager GUI adds the VSAN to one of the following VSANs nodes:

      • The Storage Cloud > VSANs node for a storage VSAN accessible to both fabric interconnects.

      • The Storage Cloud > Fabric_Name > VSANs node for a VSAN accessible to only one fabric interconnect.

      Deleting a VSAN

      If Cisco UCS Manager includes a named VSAN with the same VSAN ID as the one you delete, the VSAN is not removed from the fabric interconnect configuration until all named VSANs with that ID are deleted.

      Procedure
        Step 1   In the Navigation pane, click the SAN tab.
        Step 2   In the SAN tab, click the SAN node.
        Step 3   In the Work pane, click the VSANs tab.
        Step 4   Click one of the following subtabs, depending upon what type of VSAN you want to delete:
        Subtab Description

        All

        Displays all VSANs in the Cisco UCS domain.

        Dual Mode

        Displays the VSANs that are accessible to both fabric interconnects.

        Switch A

        Displays the VSANs that are accessible to only fabric interconnect A.

        Switch B

        Displays the VSANs that are accessible to only fabric interconnect B.

        Step 5   In the table, click the VSAN you want to delete.

        You can use the Shift key or Ctrl key to select multiple entries.

        Step 6   Right-click the highlighted VSAN or VSANs and choose Delete.
        Step 7   If the Cisco UCS Manager GUI displays a confirmation dialog box, click Yes.

        Changing the VLAN ID for the FCoE VLAN for a Storage VSAN


        Note

        FCoE VLANs in the SAN cloud and VLANs in the LAN cloud must have different IDs. Using the same ID for an FCoE VLAN in a VSAN and a VLAN results in a critical fault and traffic disruption for all vNICs and uplink ports using that FCoE VLAN. Ethernet traffic is dropped on any VLAN which has an ID that overlaps with an FCoE VLAN ID.

        Procedure
          Step 1   In the Navigation pane, click the SAN tab.
          Step 2   On the SAN tab, expand SAN > Storage Cloud > VSANs.
          Step 3   Choose the VSAN for which you want to modify the FCoE VLAN ID.
          Step 4   In the Work pane, click the General tab.
          Step 5   In the FCoE VLAN field, enter the desired VLAN ID.
          Step 6   Click Save Changes.

          Enabling Fibre Channel Uplink Trunking


          Note

          If the fabric interconnects are configured for Fibre Channel end-host mode, enabling Fibre Channel uplink trunking renders all VSANs with an ID in the range from 3840 to 4079 non-operational.

          Procedure
            Step 1   In the Navigation pane, click the SAN tab.
            Step 2   On the SAN tab, expand SAN > SAN Cloud.
            Step 3   Click the node for the fabric where you want to enable FC uplink trunking.
            Step 4   In the Work pane, click the General tab.
            Step 5   In the Actions area, click Enable FC Uplink Trunking.
            Step 6   If the Cisco UCS Manager GUI displays a confirmation dialog box, click Yes.

            Disabling Fibre Channel Uplink Trunking

            Procedure
              Step 1   In the Navigation pane, click the SAN tab.
              Step 2   On the SAN tab, expand SAN > SAN Cloud.
              Step 3   Click the node for the fabric where you want to disable Fibre Channel uplink trunking.
              Step 4   In the Work pane, click the General tab.
              Step 5   In the Actions area, click Disable FC Uplink Trunking.
              Step 6   If the Cisco UCS Manager GUI displays a confirmation dialog box, click Yes.
              Configuring Named VSANs

              Configuring Named VSANs

              This chapter includes the following sections:

              Named VSANs

              A named VSAN creates a connection to a specific external SAN. The VSAN isolates traffic to that external SAN, including broadcast traffic. The traffic on one named VSAN knows that the traffic on another named VSAN exists, but cannot read or access that traffic.

              Like a named VLAN, the name that you assign to a VSAN ID adds a layer of abstraction that allows you to globally update all servers associated with service profiles that use the named VSAN. You do not need to reconfigure the servers individually to maintain communication with the external SAN. You can create more than one named VSAN with the same VSAN ID.

              Named VSANs in Cluster Configurations

              In a cluster configuration, a named VSAN can be configured to be accessible only to the Fibre Channel uplink ports on one fabric interconnect or to the Fibre Channel uplink ports on both fabric interconnects.

              Named VSANs and the FCoE VLAN ID

              You must configure each named VSAN with an FCoE VLAN ID. This property determines which VLAN is used for transporting the VSAN and its Fibre Channel packets.

              For FIP-capable, converged network adapters, such as the Cisco UCS CNA M72KR-Q and the Cisco UCS CNA M72KR-E, the named VSAN must be configured with a named VLAN that is not the native VLAN for the FCoE VLAN ID. This configuration ensures that FCoE traffic can pass through these adapters.

              In the following sample configuration, a service profile with a vNIC and vHBA mapped to fabric A is associated with a server that has FIP capable, converged network adapters:

              • The vNIC is configured to use VLAN 10.

              • VLAN 10 is also designated as the native VLAN for the vNIC.

              • The vHBA is configured to use VSAN 2.

              • Therefore, VSAN 2 cannot be configured with VLAN 10 as the FCoE VLAN ID. VSAN 2 can be mapped to any other VLAN configured on fabric A.

              Fibre Channel Uplink Trunking for Named VSANs

              You can configure Fibre Channel uplink trunking for the named VSANs on each fabric interconnect. If you enable trunking on a fabric interconnect, all named VSANs in a Cisco UCS domain are allowed on all Fibre Channel uplink ports on that fabric interconnect.

              Guidelines and Recommendations for VSANs

              The following guidelines and recommendations apply to all named VSANs, including storage VSANs.

              VSAN 4079 is a Reserved VSAN ID

              Do not configure a VSAN as 4079. This VSAN is reserved and cannot be used in either FC switch mode or FC end-host mode.

              If you create a named VSAN with ID 4079, Cisco UCS Manager marks that VSAN with an error and raises a fault.

              Reserved VSAN Range for Named VSANs in FC Switch Mode

              If you plan to use FC switch mode in a Cisco UCS domain, do not configure VSANs with an ID in the range from 3040 to 4078.

              VSANs in that range are not operational if the fabric interconnects are configured to operate in FC switch mode. Cisco UCS Manager marks that VSAN with an error and raises a fault.

              Reserved VSAN Range for Named VSANs in FC End-Host Mode

              If you plan to use FC end-host mode in a Cisco UCS domain, do not configure VSANs with an ID in the range from 3840 to 4079.

              VSANs in that range are not operational if the following conditions exist in a Cisco UCS domain:

              • The fabric interconnects are configured to operate in FC end-host mode.

              • The Cisco UCS domain is configured with Fibre Channel trunking or SAN port channels.

              If these configurations exist, Cisco UCS Manager does the following:

              1. Renders all VSANs with an ID in the range from 3840 to 4079 non-operational.

              2. Raises a fault against the non-operational VSANs.

              3. Transfers all non-operational VSANs to the default VSAN.

              4. Transfers all vHBAs associated with the non-operational VSANs to the default VSAN.

              If you disable Fibre Channel trunking and delete any existing SAN port channels, Cisco UCS Manager returns all VSANs in the range from 3840 to 4078 to an operational state and restores any associated vHBAs back to those VSANs.

              Range Restrictions for Named VSAN IDs in FC Switch Mode

              If you plan to use FC switch mode in a Cisco UCS domain, do not configure VSANs in the range from 3040 to 4078.

              When a fabric interconnect operating in FC switch mode is connected to MDS as the upstream switch, VSANs configured in Cisco UCS Manager in the range from 3040 to 4078 and assigned as port VSANs cannot be created in MDS. This configuration results in a possible port VSAN mismatch.

              Guidelines for FCoE VLAN IDs


              Note

              FCoE VLANs in the SAN cloud and VLANs in the LAN cloud must have different IDs. Using the same ID for an FCoE VLAN in a VSAN and a VLAN results in a critical fault and traffic disruption for all vNICs and uplink ports using that FCoE VLAN. Ethernet traffic is dropped on any VLAN which has an ID that overlaps with an FCoE VLAN ID.

              VLAN 4048 is user configurable. However, Cisco UCS Manager uses VLAN 4048 for the following default values. If you want to assign 4048 to a VLAN, you must reconfigure these values:

              • After an upgrade to Cisco UCS, Release 2.0—The FCoE storage port native VLAN uses VLAN 4048 by default. If the default FCoE VSAN was set to use VLAN 1 before the upgrade, you must change it to a VLAN ID that is not used or reserved. For example, consider changing the default to 4049 if that VLAN ID is not in use.

              • After a fresh install of Cisco UCS, Release 2.0—The FCoE VLAN for the default VSAN uses VLAN 4048 by default. The FCoE storage port native VLAN uses VLAN 4049.

              Creating a Named VSAN


              Note

              FCoE VLANs in the SAN cloud and VLANs in the LAN cloud must have different IDs. Using the same ID for an FCoE VLAN in a VSAN and a VLAN results in a critical fault and traffic disruption for all vNICs and uplink ports using that FCoE VLAN. Ethernet traffic is dropped on any VLAN which has an ID that overlaps with an FCoE VLAN ID.

              Procedure
                Step 1   In the Navigation pane, click the SAN tab.
                Step 2   On the SAN tab, expand SAN > SAN Cloud.
                Step 3   In the Work pane, click the VSANs tab.
                Step 4   On the icon bar to the right of the table, click +.

                If the + icon is disabled, click an entry in the table to enable it.

                Step 5   In the Create VSAN dialog box, complete the following fields:
                Name Description

                Name field

                The name assigned to the network.

                This name can be between 1 and 32 alphanumeric characters. You cannot use spaces or any special characters other than - (hyphen), _ (underscore), : (colon), and . (period), and you cannot change this name after the object has been saved.

                FC Zoning field

                Click the radio button to determine whether Cisco UCS Manager configures Fibre Channel zoning for the Cisco UCS domain. This can be one of the following:

                • Disabled—The upstream switch handles Fibre Channel zoning, or Fibre Channel zoning is not implemented for the Cisco UCS domain. Cisco UCS Manager does not configure Fibre Channel zoning.

                • Enabled—Cisco UCS Manager configures and controls Fibre Channel zoning for the Cisco UCS domain.

                Note   

                If you enable Fibre Channel zoning through Cisco UCS Manager, do not configure the upstream switch with any VSANs that are being used for Fibre Channel zoning.

                Type radio button

                Click the radio button to determine how the VSAN should be configured. This can be one of the following:

                • Common/Global—The VSAN maps to the same VSAN ID in all available fabrics.

                • Fabric A—The VSAN maps to the a VSAN ID that exists only in fabric A.

                • Fabric B—The VSAN maps to the a VSAN ID that exists only in fabric B.

                • Both Fabrics Configured Differently—The VSAN maps to a different VSAN ID in each available fabric. If you choose this option, Cisco UCS Manager GUI displays a VSAN ID field and a FCoE VLAN field for each fabric.

                VSAN ID field

                The unique identifier assigned to the network.

                The ID can be between 1 and 4078, or between 4080 and 4093. 4079 is a reserved VSAN ID. In addition, if you plan to use FC end-host mode, the range between 3840 to 4079 is also a reserved VSAN ID range.

                FCoE VLAN field

                The unique identifier assigned to the VLAN used for Fibre Channel connections.

                VLAN 4048 is user configurable. However, Cisco UCS Manager uses VLAN 4048 for the following default values. If you want to assign 4048 to a VLAN, you must reconfigure these values:

                • After an upgrade to Cisco UCS, Release 2.0—The FCoE storage port native VLAN uses VLAN 4048 by default. If the default FCoE VSAN was set to use VLAN 1 before the upgrade, you must change it to a VLAN ID that is not used or reserved. For example, consider changing the default to 4049 if that VLAN ID is not in use.

                • After a fresh install of Cisco UCS, Release 2.0—The FCoE VLAN for the default VSAN uses VLAN 4048 by default. The FCoE storage port native VLAN uses VLAN 4049.

                For FIP-capable, converged network adapters, such as the Cisco UCS CNA M72KR-Q and the Cisco UCS CNA M72KR-E, the named VSAN must be configured with a named VLAN that is not the native VLAN for the FCoE VLAN ID. This configuration ensures that FCoE traffic can pass through these adapters.
                Step 6   Click OK.

                Cisco UCS Manager GUI adds the VSAN to one of the following VSANs nodes:

                • The SAN Cloud > VSANs node for a storage VSAN accessible to both fabric interconnects.

                • The SAN Cloud > Fabric_Name > VSANs node for a VSAN accessible to only one fabric interconnect.

                Creating a Storage VSAN


                Note

                FCoE VLANs in the SAN cloud and VLANs in the LAN cloud must have different IDs. Using the same ID for an FCoE VLAN in a VSAN and a VLAN results in a critical fault and traffic disruption for all vNICs and uplink ports using that FCoE VLAN. Ethernet traffic is dropped on any VLAN which has an ID that overlaps with an FCoE VLAN ID.

                Procedure
                  Step 1   In the Navigation pane, click the SAN tab.
                  Step 2   On the SAN tab, expand SAN > Storage Cloud.
                  Step 3   In the Work pane, click the VSANs tab.
                  Step 4   On the icon bar to the right of the table, click +.

                  If the + icon is disabled, click an entry in the table to enable it.

                  Step 5   In the Create VSAN dialog box, complete the following fields:
                  Name Description

                  Name field

                  The name assigned to the network.

                  This name can be between 1 and 32 alphanumeric characters. You cannot use spaces or any special characters other than - (hyphen), _ (underscore), : (colon), and . (period), and you cannot change this name after the object has been saved.

                  FC Zoning field

                  Click the radio button to determine whether Cisco UCS Manager configures Fibre Channel zoning for the Cisco UCS domain. This can be one of the following:

                  • Disabled—The upstream switch handles Fibre Channel zoning, or Fibre Channel zoning is not implemented for the Cisco UCS domain. Cisco UCS Manager does not configure Fibre Channel zoning.

                  • Enabled—Cisco UCS Manager configures and controls Fibre Channel zoning for the Cisco UCS domain.

                  Note   

                  If you enable Fibre Channel zoning through Cisco UCS Manager, do not configure the upstream switch with any VSANs that are being used for Fibre Channel zoning.

                  Type radio button

                  Click the radio button to determine how the VSAN should be configured. This can be one of the following:

                  • Common/Global—The VSAN maps to the same VSAN ID in all available fabrics.

                  • Fabric A—The VSAN maps to the a VSAN ID that exists only in fabric A.

                  • Fabric B—The VSAN maps to the a VSAN ID that exists only in fabric B.

                  • Both Fabrics Configured Differently—The VSAN maps to a different VSAN ID in each available fabric. If you choose this option, Cisco UCS Manager GUI displays a VSAN ID field and a FCoE VLAN field for each fabric.

                  VSAN ID field

                  The unique identifier assigned to the network.

                  The ID can be between 1 and 4078, or between 4080 and 4093. 4079 is a reserved VSAN ID. In addition, if you plan to use FC end-host mode, the range between 3840 to 4079 is also a reserved VSAN ID range.

                  FCoE VLAN field

                  The unique identifier assigned to the VLAN used for Fibre Channel connections.

                  VLAN 4048 is user configurable. However, Cisco UCS Manager uses VLAN 4048 for the following default values. If you want to assign 4048 to a VLAN, you must reconfigure these values:

                  • After an upgrade to Cisco UCS, Release 2.0—The FCoE storage port native VLAN uses VLAN 4048 by default. If the default FCoE VSAN was set to use VLAN 1 before the upgrade, you must change it to a VLAN ID that is not used or reserved. For example, consider changing the default to 4049 if that VLAN ID is not in use.

                  • After a fresh install of Cisco UCS, Release 2.0—The FCoE VLAN for the default VSAN uses VLAN 4048 by default. The FCoE storage port native VLAN uses VLAN 4049.

                  For FIP-capable, converged network adapters, such as the Cisco UCS CNA M72KR-Q and the Cisco UCS CNA M72KR-E, the named VSAN must be configured with a named VLAN that is not the native VLAN for the FCoE VLAN ID. This configuration ensures that FCoE traffic can pass through these adapters.
                  Step 6   Click OK.

                  Cisco UCS Manager GUI adds the VSAN to one of the following VSANs nodes:

                  • The Storage Cloud > VSANs node for a storage VSAN accessible to both fabric interconnects.

                  • The Storage Cloud > Fabric_Name > VSANs node for a VSAN accessible to only one fabric interconnect.

                  Deleting a VSAN

                  If Cisco UCS Manager includes a named VSAN with the same VSAN ID as the one you delete, the VSAN is not removed from the fabric interconnect configuration until all named VSANs with that ID are deleted.

                  Procedure
                    Step 1   In the Navigation pane, click the SAN tab.
                    Step 2   In the SAN tab, click the SAN node.
                    Step 3   In the Work pane, click the VSANs tab.
                    Step 4   Click one of the following subtabs, depending upon what type of VSAN you want to delete:
                    Subtab Description

                    All

                    Displays all VSANs in the Cisco UCS domain.

                    Dual Mode

                    Displays the VSANs that are accessible to both fabric interconnects.

                    Switch A

                    Displays the VSANs that are accessible to only fabric interconnect A.

                    Switch B

                    Displays the VSANs that are accessible to only fabric interconnect B.

                    Step 5   In the table, click the VSAN you want to delete.

                    You can use the Shift key or Ctrl key to select multiple entries.

                    Step 6   Right-click the highlighted VSAN or VSANs and choose Delete.
                    Step 7   If the Cisco UCS Manager GUI displays a confirmation dialog box, click Yes.

                    Changing the VLAN ID for the FCoE VLAN for a Storage VSAN


                    Note

                    FCoE VLANs in the SAN cloud and VLANs in the LAN cloud must have different IDs. Using the same ID for an FCoE VLAN in a VSAN and a VLAN results in a critical fault and traffic disruption for all vNICs and uplink ports using that FCoE VLAN. Ethernet traffic is dropped on any VLAN which has an ID that overlaps with an FCoE VLAN ID.

                    Procedure
                      Step 1   In the Navigation pane, click the SAN tab.
                      Step 2   On the SAN tab, expand SAN > Storage Cloud > VSANs.
                      Step 3   Choose the VSAN for which you want to modify the FCoE VLAN ID.
                      Step 4   In the Work pane, click the General tab.
                      Step 5   In the FCoE VLAN field, enter the desired VLAN ID.
                      Step 6   Click Save Changes.

                      Enabling Fibre Channel Uplink Trunking


                      Note

                      If the fabric interconnects are configured for Fibre Channel end-host mode, enabling Fibre Channel uplink trunking renders all VSANs with an ID in the range from 3840 to 4079 non-operational.

                      Procedure
                        Step 1   In the Navigation pane, click the SAN tab.
                        Step 2   On the SAN tab, expand SAN > SAN Cloud.
                        Step 3   Click the node for the fabric where you want to enable FC uplink trunking.
                        Step 4   In the Work pane, click the General tab.
                        Step 5   In the Actions area, click Enable FC Uplink Trunking.
                        Step 6   If the Cisco UCS Manager GUI displays a confirmation dialog box, click Yes.

                        Disabling Fibre Channel Uplink Trunking

                        Procedure
                          Step 1   In the Navigation pane, click the SAN tab.
                          Step 2   On the SAN tab, expand SAN > SAN Cloud.
                          Step 3   Click the node for the fabric where you want to disable Fibre Channel uplink trunking.
                          Step 4   In the Work pane, click the General tab.
                          Step 5   In the Actions area, click Disable FC Uplink Trunking.
                          Step 6   If the Cisco UCS Manager GUI displays a confirmation dialog box, click Yes.