Terminology

Term	Definition
VSF	Virtual Switching Framework
L2	Layer 2 of the OSI 7-layer model
L3	Layer 3 of the OSI 7-layer model
SKU	Stock Keeping Unit
FRU	Field Replaceable Unit
ASIC	Application-Specific-Integrated Circuit
L-Agg	Link Aggregation
CLI	Command Line Interface

Role	Definition
Primary	The primary member is member number 1.
Secondary	The configured secondary member.
Master	Controls VSF administration and control plane.
Standby	备用马的管理和控制ster; synchronizes control plan with the master.
Member	All devices in the stack other than the master and standby are called member switches. The member switch does not run any networking protocols and has no states. The interfaces on this switch are directly controlled and programmed by the master switch.