Manage crypto capacity 编辑

Starting with release 12.1 48.13, the interface to manage crypto capacity has changed. The Management Service provides asymmetric crypto units (ACUs), symmetric crypto units (SCUs), and crypto virtual interfaces to denote SSL capacity on the Citrix ADC SDX appliance. Earlier crypto capacity was assigned in units of SSL chips, SSL cores, and SSL virtual functions. See the Legacy SSL chips to ACU and SCU conversion table for more information about how legacy SSL chips translate into ACU and SCU units.

By using the Management Service GUI, you can allocate crypto capacity to the Citrix ADC VPX instance in units of ACU and SCU.

The following table provides brief descriptions about ACUs, SCUs, and crypto virtual instances.

Table. Unit crypto units

View crypto capacity of the SDX appliance

You can view the crypto capacity of the SDX appliance in the dashboard of the SDX GUI. The dashboard displays the used and available ACUs, SCUs, and virtual interfaces on the SDX appliance. To view the crypto capacity, navigate to Dashboard > Crypto Capacity.

Allocate crypto capacity while provisioning the VPX instance

While provisioning a VPX instance on the SDX appliance, under Crypto Allocation, you can allocate the number of ACUs and SCUs for the VPX instance. For instructions to provision a VPX instance, see Provisioning Citrix ADC instances.

To allocate crypto capacity while provisioning a VPX instance, follow these steps.

1. Log on to the Management Service.

2. Navigate to Configuration > Citrix ADC > Instances, and click Add.

3. Under Crypto Allocation, you can view the available ACUs, SCU, and crypto virtual interfaces. The way to allocate ACUs and SCUs differs depending on the SDX appliance:

   a. For the appliances listed in the Minimum value of an ACU counter available for different SDX appliances, you can assign ACUs in multiples of a specified number. SCUs are automatically allocated and the SCU allocation field is not editable. You can increase ACU allocation in the multiples of the minimum ACU available for that model. For example, if the minimum ACU is 4375, the ACU increment is 8750, 13125, and so on.

   Example. Crypto allocation where SCUs are automatically assigned, and ACUs are assigned in multiples of a specified number.

   

Minimum value of an ACU counter available for different SDX appliances

b. For the rest of the SDX platforms, which are not listed in the preceding table, you can freely assign ACUs and SCUs. The SDX appliance automatically allocates crypto virtual interfaces.

Example. Crypto allocation where both ACU and SCUs are freely assigned

4./ Complete all the steps for provisioning the VPX instance, and click Done. For more information, see Provisioning Citrix ADC instances.

View crypto hardware health

In Management Service, you can view the health of the crypto hardware provided with the SDX appliance. The health of the crypto hardware is represented as Crypto Devices and Crypto Virtual Functions. To view the health of the crypto hardware, navigate to Dashboard > Resources.

Points to note

Keep the following points in mind when you upgrade the SDX appliance to the latest version.

• Only the SDX user interface gets upgraded, but the hardware capacity of the appliance remains the same.

• The crypto allocation mechanism remains the same, and only the representation on the SDX GUI changes.

• Crypto interface is backward compatible, and it does not affect any existing automation mechanism that uses the NITRO interface to manage the SDX appliance.

• Upon SDX appliance upgrade, the crypto assigned to the existing VPX instances does not change; only its representation on the Management Service changes.

ACU to PKE resource conversion table

*On these platforms the PKE numbers are the minimum guaranteed values.

How to read the ACU to PKE resource conversion table

The ACU to PKE resource conversion table is based on the following points:

• Management Service helps allocate Crypto Resources to each individual VPX. Management Service cannot allocate or promise performance.

• Actual performance varies depending on packet size, cipher/Keyex/HMAC (or their variations) used, and so on

The following example helps you understand how to read and apply the ACU to the PKE resource conversion table.

Example. ACU to PKE resource conversion for the SDX 22040 platform

Allocation of 2187 ACUs to a VPX instance on an SDX 22040 platform allocates crypto resource equivalent to 256 ECDHE-RSA operations or 2187 RSA-2K operations and so on.

Legacy SSL chips to ACU and SCU conversion table

For more information about how legacy SSL chips are converted to ACU and SCU, see the following table.

ACU and SCU conversion table