Cisco Layer 2/3 EtherSwitch Modules for Router Cisco ISR4000 Series - NIM-ES2-4= 4-port Layer 2 GE Switch Network Interface Module - NIM-ES2-8= 8-port Layer 2 GE Switch Network Interface Module - NIM-ES2-8-P= 8-port POE/POE+ Layer 2 GE Switch Network Interface Module - SM-X-ES3-16-P= SM-X EtherSwitch, L2/L3, SM, 16 GE, POE+ - SM-X-ES3-24-P= SM-X EtherSwitch, L2/L3, SM, 24 GE, POE+ - SM-X-ES3D-48-P= SM-X EtherSwitch, L2/L3, SM, 48 GE, 2 SFP, POE+ Chi tiết xem tại: Module mở rộng cho Router Cisco ISR4000 Series (ISR4221,ISR4321,ISR4331,ISR4351,ISR4431,ISR4451)