Configuring Storage-Related Policies

This chapter includes the following sections:

Configuring vHBA Templates

vHBA Template

This template is a policy that defines how a vHBA on a server connects to the SAN. It is also referred to as a vHBA SAN connectivity template.

You need to include this policy in a service profile for it to take effect.

Creating a vHBA Template

Before You Begin

This policy requires that one or more of the following resources already exist in the system:


  • Named VSAN

  • WWNN pool or WWPN pool

  • SAN pin group

  • Statistics threshold policy


Procedure
Step 1   In the Navigation pane, click the SAN tab.
Step 2   On the SAN tab, expand SAN > Policies.
Step 3   Expand the node for the organization where you want to create the policy.

If the system does not include multi-tenancy, expand the root node.

Step 4   Right-click the vHBA Templates node and choose Create vHBA Template.
Step 5   In the Create vHBA Template dialog box, complete the following fields:
Name Description

Name field

The name of the virtual HBA template.

This name can be between 1 and 16 alphanumeric characters. You cannot use spaces or any special characters, and you cannot change this name after the object has been saved.

Description field

A user-defined description of the template.

Fabric ID field

The name of the fabric interconnect that vHBAs created with this template are associated with.

Select VSAN drop-down list

The VSAN to associate with vHBAs created from this template.

Create VSAN link

Click this link if you want to create a VSAN.

Template Type field

This can be:


  • Initial Template—vHBAs created from this template are not updated if the template changes.

  • Updating Template—vHBAs created from this template are updated if the template changes.

Max Data Field Size field

The maximum size of the Fibre Channel frame payload bytes that the vHBA supports.

Enter an integer between 256 and 2112. The default is 2048.

WWN Pool drop-down list

The WWN pool that a vHBA created from this template uses to derive its WWN address.

QoS Policy drop-down list

The QoS policy that is associated with vHBAs created from this template.

Pin Group drop-down list

The LAN pin group that is associated with vHBAs created from this template.

Stats Threshold Policy drop-down list

The statistics collection policy that is associated with vHBAs created from this template.

Step 6   Click OK.
What to Do Next

Include the vHBA template in a service profile.

Deleting a vHBA Template

Procedure
Step 1   In the Navigation pane, click the SAN tab.
Step 2   On the SAN tab, expand SAN > Policies > Organization_Name.
Step 3   Expand the vHBA Templates node.
Step 4   Right-click the vHBA template that you want to delete and choose Delete.
Step 5   If Cisco UCS Manager GUI displays a confirmation dialog box, click Yes.

Binding a vHBA to a vHBA Template

You can bind a vHBA associated with a service profile to a vHBA template. When you bind the vHBA to a vHBA template, Cisco UCS Manager configures the vHBA with the values defined in the vHBA template. If the existing vHBA configuration does not match the vHBA template, Cisco UCS Manager reconfigures the vHBA. You can only change the configuration of a bound vHBA through the associated vHBA template. You cannot bind a vHBA to a vHBA template if the service profile that includes the vHBA is already bound to a service profile template.

Important:

If the vHBA is reconfigured when you bind it to a template, Cisco UCS Manager reboots the server associated with the service profile.

Procedure
Step 1   In the Navigation pane, click the Servers tab.
Step 2   On the Servers tab, expand Servers > Service Profiles.
Step 3   Expand the node for the organization that includes the service profile with the vHBA you want to bind.

If the system does not include multi-tenancy, expand the root node.

Step 4   Expand Service_Profile_Name > vHBAs.
Step 5   Click the vHBA you want to bind to a template.
Step 6   In the Work pane, click the General tab.
Step 7   In the Actions area, click Bind to a Template.
Step 8   In the Bind to a vHBA Template dialog box, do the following:
  1. From the vHBA Template drop-down list, choose the template to which you want to bind the vHBA.
  2. Click OK.
Step 9   In the warning dialog box, click Yes to acknowledge that Cisco UCS Manager may need to reboot the server if the binding causes the vHBA to be reconfigured.

Unbinding a vHBA from a vHBA Template

Procedure
Step 1   In the Navigation pane, click the Servers tab.
Step 2   On the Servers tab, expand Servers > Service Profiles.
Step 3   Expand the node for the organization that includes the service profile with the vHBA you want to unbind.

If the system does not include multi-tenancy, expand the root node.

Step 4   Expand Service_Profile_Name > vHBAs.
Step 5   Click the vHBA you want to unbind from a template.
Step 6   In the Work pane, click the General tab.
Step 7   In the Actions area, click Unbind from a Template.
Step 8   If Cisco UCS Manager GUI displays a confirmation dialog box, click Yes.

Configuring Fibre Channel Adapter Policies

Ethernet and Fibre Channel Adapter Policies

These policies govern the host-side behavior of the adapter, including how the adapter handles traffic. For example, you can use these policies to change default settings for the following:


  • Queues

  • Interrupt handling

  • Performance enhancement

  • RSS hash

  • Failover in an cluster configuration with two fabric interconnects


Note

For Fibre Channel adapter policies, the values displayed by Cisco UCS Manager may not match those displayed by applications such as QLogic SANsurfer. For example, the following values may result in an apparent mismatch between SANsurfer and Cisco UCS Manager:


  • Max LUNs Per Target—SANsurfer has a maximum of 256 LUNs and does not display more than that number. Cisco UCS Manager supports a higher maximum number of LUNs.

  • Link Down Timeout—In SANsurfer, you configure the timeout threshold for link down in seconds. In Cisco UCS Manager, you configure this value in milliseconds. Therefore, a value of 5500 ms in Cisco UCS Manager displays as 5s in SANsurfer.

  • Max Data Field Size—SANsurfer has allowed values of 512, 1024, and 2048. Cisco UCS Manager allows you to set values of any size. Therefore, a value of 900 in Cisco UCS Manager displays as 512 in SANsurfer.

Operating System Specific Adapter Policies

By default, Cisco UCS provides a set of Ethernet adapter policies and Fibre Channel adapter policies. These policies include the recommended settings for each supported server operating system. Operating systems are sensitive to the settings in these policies. Storage vendors typically require non-default adapter settings. You can find the details of these required settings on the support list provided by those vendors.

Important:

We recommend that you use the values in these policies for the applicable operating system. Do not modify any of the values in the default policies unless directed to do so by Cisco Technical Support.

However, if you are creating an Ethernet adapter policy for a Windows OS (instead of using the default Windows adapter policy), you must use the following formulas to calculate values that work with Windows:


  • Completion Queues = Transmit Queues + Receive Queues
  • Interrupt Count = (Completion Queues + 2) rounded up to nearest power of 2

For example, if Transmit Queues = 1 and Receive Queues = 8 then:


  • Completion Queues = 1 + 8 = 9
  • Interrupt Count = (9 + 2) rounded up to the nearest power of 2 = 16

Creating a Fibre Channel Adapter Policy


Tip

If the fields in an area are not displayed, click the Expand icon to the right of the heading.

Procedure
Step 1   In the Navigation pane, click the Servers tab.
Step 2   On the Servers tab, expand Servers > Policies.
Step 3   Expand the node for the organization where you want to create the policy.

If the system does not include multi-tenancy, expand the root node.

Step 4   Right-click Fibre Channel Policies and choose Create Fibre Channel Adapter Policy.
Step 5   Enter a name and description for the policy in the following fields:
Name Description

Name field

The name of the policy.

This name can be between 1 and 16 alphanumeric characters. You cannot use spaces or any special characters, and you cannot change this name after the object has been saved.

Description field

A description of the policy. We recommend including information about where and when the policy should be used.

Step 6   (Optional) In the Resources area, adjust the following values:
Name Description

Transmit Queues field

The number of transmit queue resources to allocate.

This value cannot be changed.

Ring Size field

The number of descriptors in each transmit queue.

Enter an integer between 64 and 128.

Receive Queues field

The number of receive queue resources to allocate.

This value cannot be changed.

Ring Size field

The number of descriptors in each receive queue.

Enter an integer between 64 and 128.

SCSI I/O Queues field

The number of SCSI IO queue resources the system should allocate.

Enter an integer between 1 and 8.

Note   

At this time, the Cisco M81KR VIC adapter only supports one SCSI I/O queue.

Ring Size field

The number of descriptors in each SCSI I/O queue.

Enter an integer between 64 and 512.

Step 7   (Optional) In the Options area, adjust the following values:
Name Description

FCP Error Recovery field

Whether the system uses FCP Sequence Level Error Recovery protocol (FC-TAPE). This can be:


  • disabled

  • enabled

Note   

This option only applies to a server with a VIC adapter, such as the Cisco M81KR VIC, running Windows or Linux.

Flogi Retries field

The number of times that the system tries to log in to the fabric after the first failure.

Enter any integer. To specify that the system continue to try indefinitely, enter infinite or -1 in this field.

Note   

This option only applies to a server with a VIC adapter, such as the Cisco M81KR VIC, running Windows.

Flogi Timeout field

The number of milliseconds that the system waits before it tries to log in again.

Enter an integer between 1000 and 255000.

Note   

This option only applies to a server with a VIC adapter, such as the Cisco M81KR VIC, running Windows.

Plogi Retries field

The number of times that the system tries to log into a port after the first failure.

Enter an integer between 0 and 255.

Note   

This option only applies to a server with a VIC adapter, such as the Cisco M81KR VIC, running Windows or Linux.

Plogi Timeout field

The number of milliseconds that the system waits before it tries to log in again.

Enter an integer between 1000 and 255000.

Note   

This option only applies to a server with a VIC adapter, such as the Cisco M81KR VIC, running Windows.

Error Detect Timeout field

The number of milliseconds to wait before the system assumes that an error has occurred.

This value cannot be changed.

Port Down Timeout field

The number of milliseconds a remote Fibre Channel port should be offline before informing the SCSI upper layer that the port is unavailable.

Enter an integer between 0 and 240000.

Tip   

For a server with a VIC adapter, such as the Cisco M81KR VIC, running the ESX host, the recommended value is 10000.

Port Down IO Retry field

The number of times an IO request to a port is returned because the port is busy before the system decides the port is unavailable.

Enter an integer between 0 and 255.

Note   

This option only applies to a server with a VIC adapter, such as the Cisco M81KR VIC, running Windows.

Link Down Timeout field

The number of milliseconds the uplink port should be offline before it informs the system that the uplink port is down and fabric connectivity has been lost.

Enter an integer between 0 and 240000.

Note   

This option only applies to a server with a VIC adapter, such as the Cisco M81KR VIC, running Windows.

Resource Allocation Timeout field

The number of milliseconds to wait before the system assumes that a resource cannot be properly allocated.

This value cannot be changed.

IO Throttle Count field

The number of I/O operations that can be pending in the vHBA at one time.

Enter an integer between 1 and 1024.

Note   

This option only applies to a server with a VIC adapter, such as the Cisco M81KR VIC, running Windows.

Max LUNs Per Target field

The maximum number of LUNs that the driver will export. This is usually an operating system platform limitation.

Enter an integer between 1 and 1024. The recommended value is 1024.

Note   

This option only applies to a server with a VIC adapter, such as the Cisco M81KR VIC, running Linux or ESX host.

Interrupt Mode field

The preferred driver interrupt mode. This can be:


  • MSI-X—Message Signaled Interrupts(MSI) with the optional extension. This is the recommended option.

  • MSI—MSI only.

  • INTx—PCI INTx interrupts.

Note   

This option is not used by a VIC adapter, such as the Cisco M81KR VIC.
Step 8   Click OK.
Step 9   If Cisco UCS Manager GUI displays a confirmation dialog box, click Yes.

Deleting a Fibre Channel Adapter Policy

Procedure
Step 1   In the Navigation pane, click the SAN tab.
Step 2   On the SAN tab, expand SAN > Policies > Organization_Name.
Step 3   Expand the Fibre Channel Policies node.
Step 4   Right-click the policy you want to delete and choose Delete.
Step 5   If Cisco UCS Manager GUI displays a confirmation dialog box, click Yes.