| CBS250-24T-4G-EU Datasheet | 
| Feature | Description | 
| Capacity in millions of packets per second (mpps) (64-byte packets) | 41.66 | 
| Switching capacity in gigabits per second (Gbps) | 56.0 | 
| RJ-45 ports | 24 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 | 1.5 MB | 
| Unit dimensions (W x H x D)
 | 445 x 240 x 44 mm (17.5 x 9.45 x 1.73 in) | 
| Unit weight | 2.63 kg (5.80 lb) | 
| Power | 100 to 240V 50 to 60 Hz, internal | 
| 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) | Fanless | 
| MTBF at 25°C (hours) | 2,026,793 | 
| 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 |