| CBS250-48P-4G Specification |
| Feature | Description |
Capacity in millions of packets
per second (mpps) (64-byte packets) | 77.38 |
Switching capacity in gigabits
per second (Gbps) | 104 |
| Power dedicated to PoE | 370W |
| Number of ports that support PoE | 48 |
| Total system ports | 52 Gigabit Ethernet |
| RJ-45 ports | 48 Gigabit Ethernet |
| Packet buffer | 3 MB |
| Unit dimensions (W x D x H) | 445 x 350 x 44 mm (17.5 x 13.78 x 1.73 in) |
| Layer 2 switching |
| 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. Voice Services Discovery Protocol (VSDP) delivers
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 |
| Security |
| Secure Sockets Layer (SSL) | SSL encrypts all HTTPS traffic, allowing secure access to the browser-based
management GUI in the switch |
| Secure Shell (SSH) Protocol | SSH is a secure replacement for Telnet traffic. Secure Copy (SCP) also uses
SSH. SSH v1 and v2 are supported. |
| IEEE 802.1X (authenticator role) | Remote Authentication Dial-In User Service (RADIUS) authentication,
guest VLAN, single/multiple host mode, and single/multiple sessions |
| STP loopback guard | Provides additional protection against Layer 2 forwarding loops (STP loops) |
| Secure Core Technology (SCT) | Ensures that the switch will receive and process management and protocol
traffic no matter how much traffic is received |
| Secure Sensitive Data (SSD) | A mechanism to manage sensitive data (such as passwords, keys, and so on)
securely on the switch, populating this data to other devices, and
secure autoconfig.
Access to view the sensitive data as plain text or encrypted is provided according to
the user-configured access level and the access method of the user |
| Trustworthy systems | Trustworthy systems provide a highly secure foundation for Cisco products
Run-time defenses (Executable Space Protection [X-Space], Address Space
Layout Randomization [ASLR], Built-In Object Size Checking [BOSC]) |
| Port security | Ability to lock source MAC addresses to ports and limit the number of learned
MAC addresses |
| RADIUS | Supports RADIUS authentication for management access. Switch functions
as a client. |
| Storm control | Broadcast, multicast, and unknown unicast |
| DoS prevention | Denial-of-Service (DoS) attack prevention |
| Multiple user privilege levels in CLI | Level 1, 7, and 15 privilege levels |
| Access Control Lists (ACLs) | Support for up to 512 rules
Drop or rate limit based on source and destination MAC, VLAN ID or IPv4
or IPv6 address,
IPv6 flow label, protocol, port, Differentiated Services Code Point (DSCP)/IP
precedence,
TCP/UDP source and destination ports, 802.1p priority, Ethernet type,
Internet Control Message Protocol (ICMP) packets, IGMP packets, TCP flag;
ACL can be applied on both ingress and egress sides
Time-based ACLs supported |
| Flash | 256 MB |
| CPU | 800 MHz ARM |
| DRAM | 512 MB |
| Environmental |
| Power | 100 to 240V 50 to 60 Hz, internal, universal: CBS250-16T-2G, CBS250-16P-2G,
CBS250-24T-4G, CBS250-24PP-4G, CBS250-24P-4G, CBS250-24FP-4G,
CBS250-48T-4G, CBS250-48PP-4G, CBS250-48P-4G, CBS250-24T-4X,
CBS250-24P-4X, CBS250-24FP-4X, CBS250-48T-4X, CBS250-48P-4X
100 to 240V 50 to 60 Hz, external: CBS250-8T-D, CBS250-8PP-D,
CBS250-8T-E-2G, CBS250-8PP-E-2G, CBS250-8P-E-2G, CBS250-8FP-E-2G |
| Certification | UL (UL 62368), CSA (CSA 22.2), CE mark, FCC Part 15 (CFR 47) Class A |
| Operating temperature | 32° to 122°F (0° to 50°C) for CBS250-8T-D and CBS250-8PP-D
23° to 122°F (-5° to 50°C) for other models |
| Storage temperature | -13° to 158°F (-25° to 70°C) |
| Operating humidity | 10% to 90%, relative, noncondensing |
| Storage humidity | 10% to 90%, relative, noncondensing |
| Warranty | Limited lifetime |
