Cisco 250 Series Smart Managed Switch, PoE+, 24 Ports GbE (24 Ports PoE+, Max 195W), 2 Ports Combo RJ-45 or SFP, Limited Lifetime Warranty

Ports

Total System Ports
26 Gigabit Ethernet
RJ-45 Ports
24 Gigabit Ethernet
Combo Ports (RJ-45 + SFP)
2 Gigabit Ethernet combo

USB slot
USB slot on the front panel of the switch for easy file and image management

Buttons
Reset button

Cabling type
Unshielded twisted pair (UTP) Category 5 or better for 10BASE-T/100BASE-TX; UTP Category 5e or better for 1000BASE-T

LEDs
System, Link/Act, PoE, Speed

Flash
256 MB

CPU
800 MHz ARM

CPU memory
512 MB

Packet Buffer
12Mb

Performance
Switching capacity and forwarding rate, all switches are wire-speed and nonblocking
   - Capacity in Millions of Packets per Second (mpps) (64-byte packets) - 38.69
   - Switching Capacity in Gigabits per Second (Gbps) - 52.0
- Layer 2 Switching

Spanning Tree Protocol (STP)
- Standard 802.1d spanning tree support
- Fast convergence using 802.1w (Rapid Spanning Tree [RSTP]), enabled by default
- Multiple spanning tree instances using 802.1s (MSTP); 8 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 LAG

VLAN
- Support for up to 256 active VLANs simultaneously
- Port-based and 802.1Q tag-based VLANs
- Management 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.

IGMP (versions 1, 2, and 3) snooping
Internet Group Management Protocol (IGMP) limits bandwidth-intensive multicast traffic to only the requesters; supports 4K multicast groups (source-specific multicasting is also supported).

HOL blocking
Head-of-line (HOL) blocking.

SSL
Secure Sockets Layer (SSL) encrypts all HTTPS traffic, allowing secure access to the browser-based management GUI in the switch.

IEEE 802.1X (authenticator role)
RADIUS authentication, MD5 hash, single/multiple host mode, and single/multiple sessions.

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 plaintext or encrypted is provided according to the user-configured access level and the access method of the user.

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.

Priority levels
4 hardware queues

Scheduling
Strict priority and weighted round-robin (WRR)

Class of service
Port based; 802.1p VLAN priority based; IPv4/v6 IP precedence/ToS/DSCP based; DiffServ; trusted QoS
Queue assignment based on differentiated services code point (DSCP) and class of service (802.1p/CoS)

Rate limiting
Ingress policer, per VLAN, per port

Web user interface
Built-in switch configuration utility for easy browser-based device configuration (HTTP/HTTPS). Supports configuration, system dashboard, system maintenance, and monitoring.

SNMP
SNMP versions 1, 2c, and 3 with support for traps, and SNMP v3 User-based Security Model (USM)

Remote Monitoring (RMON)
Embedded RMON software agent supports 4 RMON groups (history, statistics, alarms, and events) for enhanced traffic management, monitoring, and analysis

IPv4 and IPv6 dual stack
Coexistence of both protocol stacks to ease migration

Firmware upgrade
Web browser upgrade (HTTP/HTTPS) and TFTP and SCP

Port mirroring
Traffic on a port can be mirrored to another port for analysis with a network analyser or RMON probe. Up to 4 source ports can be mirrored to one destination port.

VLAN mirroring
Traffic from a VLAN can be mirrored to a port for analysis with a network analyser or RMON probe. Up to 4 source VLANs can be mirrored to one destination port.

Dynamic Host Configuration Protocol (DHCP) (options 12, 66, 67, 129, and 150)
DHCP options facilitate tighter control from a central point (DHCP server), to obtain IP address, auto configuration (with configuration file download), DHCP Relay, and host name.

Auto configuration
Enables mass deployment with protection of sensitive data.

Text-editable configs
Config files can be edited with a text editor and downloaded to another switch, facilitating easier mass deployment.

Smartports
Simplified configuration of QoS and security capabilities.

Auto Smartports
Automatically applies the intelligence delivered through the Smartports roles to the port based on the devices discovered over Cisco Discovery Protocol or LLDP-MED. This facilitates zero-touch deployments.

Cloud services
Support for Cisco Active Advisor

Localization
Localization of GUI and documentation into multiple languages

Login banner
Configurable multiple banners for web as well as CLI

Other management
Traceroute; single IP management; HTTP/HTTPS; RADIUS; port mirroring; TFTP upgrade; DHCP client; Simple Network Time Protocol (SNTP); cable diagnostics; Ping; syslog; automatic time settings from Management Station.