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Virtual system (VSYS) is a virtualization technology that divides a physical device into multiple independent logical devices. Each virtual system functions as a real device that has its own resources and runs its own services, which can be independently configured and managed by an administrator. As network management becomes increasingly complex, users have higher requirements on service isolation, system security, and reliability. VSYS technology can be used to physically isolate resources and services, simplify network deployment and management, and enhance system security and reliability.