Thông Số Kỹ Thuật Switch Cisco Business CBS250-48T-4G
| Feature | Description |
| Capacity in millions of packets per second (mpps) (64-byte packets) | 77.38 |
| Switching capacity in gigabits per second (Gbps) | 104.0 |
| RJ-45 ports | 48 10/100/1000 ports |
| Combo ports (RJ-45 + SFP) | 4 Gigabit SFP |
| Flash | 256 MB |
| CPU | 800 MHz ARM |
| CPU memory | 512 MB |
| Packet buffer | 3 MB |
| Unit dimensions (W x H x D) | 445 x 273 x 44 mm (17.5 x 10.73 x 1.73 in) |
| Unit weight | 3.95 kg (8.71 lb) |
| Power | 100 to 240V 50 to 60 Hz, internal |
| System power consumption | 110V=48.27W 220V=48.64W |
| Heat dissipation (BTU/hr) | 165.96 |
| Certification | UL (UL 60950), CSA (CSA 22.2), CE mark, FCC Part 15 (CFR 47) Class A |
| Operating temperature | 23° to 122°F (-5° to 50°C) |
| Storage temperature | -13° to 158°F (-25° to 70°C) |
| Operating humidity | 10% to 90%, relative, noncondensing |
| Storage humidity | 10% to 90%, relative, noncondensing |
| Fan (number) | 1 |
| Acoustic noise | 25°C: 29.7 dBA |
| MTBF at 25°C (hours) | 1,452,667 |
| Layer 2 switching | |
| Spanning Tree Protocol (STP) | Standard 802.1d spanning tree support Fast convergence using 802.1w (Rapid Spanning Tree Protocol [RSTP]), enabled by default Multiple spanning tree instances using 802.1s (MSTP); 8 instances are supported Per-VLAN Spanning Tree Plus (PVST+); 126 instances are supported Rapid PVST+ (RPVST+); 126 instances are supported |
| Port grouping/link aggregation | Support for IEEE 802.3ad Link Aggregation Control Protocol (LACP) Up to 4 groups Up to 8 ports per group with 16 candidate ports for each (dynamic) 802.3ad Link Aggregation Group (LAG) |
| VLAN | Support for up to 255 active VLANs simultaneously Port-based and 802.1Q tag-based VLANs Management VLAN Guest VLAN |
| Voice VLAN | Voice traffic is automatically assigned to a voice-specific VLAN and treated with appropriate levels of QoS. Auto voice capabilities deliver networkwide zero-touch deployment of voice endpoints and call control devices |
| Layer 3 routing | |
| IPv4 routing | Wire-speed routing of IPv4 packets Up to 32 static routes and up to 16 IP interfaces |
| IPv6 routing | Wire-speed routing of IPv6 packets |
| Layer 3 interface | Configuration of Layer 3 interface on physical port, LAG, VLAN interface, or loopback interface |
| Dynamic Host Configuration Protocol (DHCP) relay at Layer 3 | Relay of DHCP traffic across IP domains |
| User Datagram Protocol (UDP) relay | Relay of broadcast information across Layer 3 domains for application discovery or relaying of Bootstrap Protocol (BootP)/DHCP packets |
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