A guest has two important parameters: cpus and cpuset.

cpus

The parameter specifies how many CPUs are used by a guest. For a guest installed with vRouter, the number of CPUs is usually four for optimum performance. For most other guests, one CPU is sufficient. For more information on assigning CPUs to a guest, refer to virtualization guest <guest-name> cpus <cpu-number>.

cpuset

The parameter specifies which CPUs are used. For a guest, the value of this parameter must point to those CPUs that are not used by the data plane and other guests. For more information on assigning CPU sets to a guest, refer to virtualization guest <guest-name> cpuset <cpu-number>.

When vCPE is installed on low-power devices, guests may receive but become unable to transmit data. To avoid the inability to transmit data, provision guests so that they run on unique CPUs. After you install vCPE, you must ensure that each guest is assigned its own unique CPU and the vCPE data plane includes CPU 0 among its CPU set.