Cisco 250 Smart Switches | SG250-50-K9-EU SG250-50 48 Port 10/100/1000, 2x1G SFP/RJ-45

Performance

Switching capacity and forwarding rate

All switches are wire-speed and nonblocking

Model

Capacity in millions of packets per second (mpps) (64-byte packets)

Switching capacity in gigabits per second (Gbps)

SF250-24

9.52

12.8

SF250-24P

9.52

12.8

SF250-48

13.10

17.6

SF250-48HP

13.10

17.6

SG250-08

11.90

16.0

SG250-08HP

11.90

16.0

SG250-10P

14.88

20.0

SG250-18

26.78

36.0

SG250-26

38.69

52.0

SG250-26HP

38.69

52.0

SG250-26P

38.69

52.0

SG250-50

74.41

100.0

SG250-50HP

74.41

100.0

SG250-50P

74.41

100.0

SG250X-24

95.23

128.0

SG250X-24P

95.23

128.0

SG250X-48

130.94

176.0

SG250X-48P

130.94

176.0

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

Port grouping/link aggregation

Support for IEEE 802.3ad Link Aggregation Control Protocol (LACP)

VLAN

Support for up to 256 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

Generic VLAN Registration Protocol (GVRP)and Generic Attribute Registration Protocol (GARP)

Protocols for automatically propagating and configuring VLANs in a bridged domain

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)

IGMP querier

Used to support a Layer 2 multicast domain of snooping switches in the absence of a multicast router

HOL blocking

Head-Of-Line (HOL) blocking

Loopback detection

Provides protection against loops by transmitting loop protocol packets out of ports on which loop protection has been enabled. It operates independently of STP

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

Classless Interdomain Routing (CIDR)

Support for CIDR

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 bootP/DHCP packets

Security

SSL

Secure Sockets Layer (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)

RADIUS authentication, guest VLAN, single/multiple host mode, and single/multiple sessions

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 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

Access Control Lists (ACLs)

Support for up to 512 rules

Drop or rate limit based on source and destination MAC, VLAN ID or IP address, 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

STP loopback guard

Provides additional protection against Layer 2 forwarding loops (STP loops)

Quality of service

Priority levels

8 hardware queues

Scheduling

Strict priority and Weighted Round-Robin (WRR) queue assignment based on DSCP and class of service (802.1p/CoS)

Class of service

Port based; 802.1p VLAN priority based; IPv4/v6 IP precedence/Type of Service (ToS)/DSCP based; Differentiated Services (DiffServ); classification and re-marking ACLs, trusted QoS

Rate limiting

Ingress policer; egress shaping and rate control; per VLAN, per port, and flow based

Congestion avoidance

A TCP congestion avoidance algorithm is required to reduce and prevent global TCP loss synchronization

Standards

Standards

IEEE 802.3 10BASE-T Ethernet, IEEE 802.3u 100BASE-TX Fast Ethernet, IEEE 802.3ab 1000BASE-T Gigabit Ethernet, IEEE 802.3ad Link Aggregation Control Protocol, IEEE 802.3z Gigabit Ethernet, IEEE 802.3x Flow Control, IEEE 802.3 ad LACP, IEEE 802.1D (STP), IEEE 802.1Q/p VLAN, IEEE 802.1w RSTP, IEEE 802.1s Multiple STP, IEEE 802.1X Port Access Authentication, IEEE 802.3af, IEEE 802.3at, RFC 768, RFC 783, RFC 791, RFC 792, RFC 793, RFC 813, RFC 879, RFC 896, RFC 826, RFC 854, RFC 855, RFC 856, RFC 858, RFC 894, RFC 919, RFC 920, RFC 922, RFC 950, RFC 951, RFC 1042, RFC 1071, RFC 1123, RFC 1141, RFC 1155, RFC 1157, RFC 1213, RFC 1215, RFC 1286, RFC 1350, RFC 1442, RFC 1451, RFC 1493, RFC 1533, RFC 1541, RFC 1542, RFC 1573, RFC 1624, RFC 1643, RFC 1700, RFC 1757, RFC 1867, RFC 1907, RFC 2011, RFC 2012, RFC 2013, RFC 2030, RFC 2131, RFC 2132, RFC 2233, RFC 2576, RFC 2616, RFC 2618, RFC 2665, RFC 2666, RFC 2674, RFC 2737, RFC 2819, RFC 2863, RFC 3164, RFC 3411, RFC 3412, RFC 3413, RFC 3414, RFC 3415, RFC 3416, RFC 4330

IPv6

IPv6

IPv6 host mode

IPv6 over Ethernet

Dual IPv6/IPv4 stack

IPv6 neighbor and Router Discovery (ND)

IPv6 stateless address auto configuration

Path Maximum Transmission Unit (MTU) discovery

Duplicate Address Detection (DAD)

Internet Control Message Protocol (ICMP) version 6

IPv6 over IPv4 network with Intrasite Automatic Tunnel Addressing Protocol (ISATAP) support

USGv6 and IPv6 Gold Logo certified

IPv6 QoS

Prioritize IPv6 packets in hardware

IPv6 ACL

Drop or rate limit IPv6 packets in hardware

Multicast Listener Discovery (MLD v1/2) snooping

Deliver IPv6 multicast packets only to the required receivers

IPv6 applications

Web/SSL, Telnet server/SSH, Ping, Traceroute, Simple Network Time Protocol (SNTP), Trivial File Transfer Protocol (TFTP), Simple Network Management Protocol (SNMP), Remote Authentication Dial-In User Service (RADIUS), Syslog, DNS client, DHCP client, DHCP autoconfig

IPv6 RFCs supported

RFC 4443 (which obsoletes RFC 2463): ICMPv6

RFC 4291 (which obsoletes RFC 3513): IPv6 address architecture

RFC 4291: IPv6 Addressing Architecture

RFC 2460: IPv6 Specification

RFC 4861 (which obsoletes RFC 2461): Neighbor Discovery for IPv6

RFC 4862 (which obsoletes RFC 2462): IPv6 Stateless Address Autoconfiguration

RFC 1981: Path MTU Discovery

RFC 4007: IPv6 Scoped Address Architecture

RFC 3484: Default address selection mechanism

RFC 5214 (which obsoletes RFC 4214): ISATAP tunneling

RFC 4293; MIB IPv6: Textual Conventions and General Group

RFC 3595: Textual Conventions for IPv6 Flow Label

Management

Web user interface

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

Basic and advanced mode for maximum operational efficiency

Smart Network Application (SNA)

An innovative network-level monitoring and management tool embedded in Cisco 250 to 550X Series switches. It can discover network topology, display link status, monitor events, apply configurations, and upgrade software images across multiple switches in the network

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 upgrade over SCP running over SSH

Dual images for resilient firmware upgrades

Port mirroring

Traffic on a port can be mirrored to another port for analysis with a network analyzer 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 analyzer 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, autoconfiguration (with configuration file download), DHCP Relay, and host name

Secure Copy (SCP)

Securely transfers files to and from the switch

Autoconfiguration with SCP file download

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

Textview Command-Line Interface (CLI)

Scriptable CLI. A full CLI as well as a menu-based CLI is supported. User privilege levels 1, 7, and 15 are supported for the CLI

Cloud services

Support for Cisco FindIT Network Manager and Cisco Active Advisor

Cisco Network Plug and Play (PnP) agent

The Cisco Network Plug and Play solution provides a simple, secure, unified, and integrated offering to ease new branch or campus device rollouts or for provisioning updates to an existing network. The solution provides a unified approach to provision Cisco routers, switches, and wireless devices with a near-zero-touch deployment experience

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; Telnet client (SSH secure support); automatic time settings from Management Station

Green (power efficiency)

Energy detect

Automatically turns power off on RJ-45 port when detecting link down. Active mode is resumed without loss of any packets when the switch detects the link is up

Cable length detection

Adjusts the signal strength based on the cable length. Reduces the power consumption for shorter cables

EEE compliant (802.3az)

Supports IEEE 802.3az on all copper Gigabit Ethernet ports

Disable port LEDs

LEDs can be manually turned off to save on energy

Time-based port operation

Link up or down based on user-defined schedule (when the port is administratively up)

Time-based PoE

PoE power can be on or off based on user-defined schedule to save energy

General

Jumbo frames

Frame sizes up to 9K bytes. The default MTU is 2K bytes

MAC table

8K addresses

Discovery

Bonjour

The switch advertises itself using the Bonjour protocol

Link Layer Discovery Protocol (LLDP) (802.1ab) with LLDP-MED extensions

Link Layer Discovery Protocol (LLDP) allows the switch to advertise its identification, configuration, and capabilities to neighboring devices that store the data in a MIB. LLDP-MED is an enhancement to LLDP that adds the extensions needed for IP phones

Cisco Discovery Protocol

The switch advertises itself using the Cisco Discovery Protocol. It also learns the connected device and its characteristics using Cisco Discovery Protocol

Product specifications

802.3at PoE+ and 802.3af PoE delivered over any of the RJ-45 ports within the listed power budgets

The following switches support 802.3at PoE+, 802.3af, and Cisco prestandard (legacy) PoE. Maximum power of 30.0W to any 10/100 or Gigabit Ethernet port, until the PoE budget for the switch is reached. The total power available for PoE per switch is as follows:

Model

Power dedicated to PoE

Number of ports that support PoE

SF250-24P

185W

24

SF250-48HP

195W

48

SG250-08HP

45W

8

SG250-10P

62W

8

SG250-26HP

100W

24

SG250-26P

195W

24

SG250-50HP

192W

48

SG250-50P

375W

48

SG250X-24P

195W

24

SG250X-48P

382W

48

PoE Powered Device (PD) and PoE pass-through

Besides AC power, select compact switch models can work as PoE Powered Device (PD) and be powered by PoE switches connected to the uplink ports. The switch can also pass through the power to downstream PoE end devices if required

Maximum of 60W can be drawn per uplink port if the peer PoE switch supports 60W PoE. When multiple uplink ports are connected to PoE switches, the power drawn from these ports is combined

When AC power is connected and functioning correctly, it is preferred over PoE power. The PoE power can function as a backup to the AC power source or be used as the sole power source for the switch

Model

Power option

Available PoE pass-through power (W)

Can switch be powered with uplinks?

SG250-08

1 x PoE uplink

1 x PoE+ uplink

AC Power

N/A

N/A

N/A

Yes

Yes

Yes

SG250-10P

1 x PoE uplink

2 x PoE uplink

1 x PoE+ uplink

2 x PoE+ uplink

1 x 60W PoE uplink

2 x 60W PoE uplink

AC Power

0W

0W

0W

22W

22W

50W

62W

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Power consumption
(worst case)

Model

Green power (mode)

System power consumption

Power consumption (with PoE)

Heat dissipation (BTU/hr)

SF250-24

EEE, Energy Detect

110V=10.6W

220V=10.9W

–

37.19

SF250-24P

EEE, Energy Detect

110V=29.2W

220V=28.3W

110V=238W

220V=230W

812.09

SF250-48

EEE, Energy Detect

110V=23.4W

220V=24.2W

–

82.57

SF250-48HP

EEE, Energy Detect

110V=43.1W

220V=44.3W

110V=265.2W

220V=255.8W

904.90

SG250-08

EEE, Energy Detect, Short Reach

110V=7.6W

220V=7.6W

–

25.93

SG250-08HP

EEE, Energy Detect, Short Reach

110V=9.1W

220V=10.1W

110V=61.4W

220V=59.8W

209.51

SG250-10P

EEE, Energy Detect, Short Reach

110V=13.25W

220V=13.42W

110V=85.19W

220V=84.17W

290.68

SG250-18

EEE, Energy Detect, Short Reach

110V=13.1W

220V=13.0W

–

44.70

SG250-26

EEE, Energy Detect, Short Reach

110V=18.1W

220V=18.9W

–

64.49

SG250-26HP

EEE, Energy Detect, Short Reach

110V=23.5W

220V=24.4W

110V=135.2W

220V=133.9W

461.32

SG250-26P

EEE, Energy Detect, Short Reach

110V=34.2W

220V=37.2W

110V=262W

220V=254.5W

893.98

SG250-50

EEE, Energy Detect, Short Reach

110V=35.2W

220V=35.4W

–

120.79

SG250-50HP

EEE, Energy Detect, Short Reach

110V=57.5W

220V=59.3W

110V=267.2W

220V=263.5W

911.72

SG250-50P

EEE, Energy Detect, Short Reach

110V=58.5W

220V=60.3W

110V=481.9W

220V=468.1W

1,644.31

SG250X-24

EEE, Energy Detect, Short Reach

110V=28.7W

220V=29.1W

–

99.29

SG250X-24P

EEE, Energy Detect, Short Reach

110V=46.8W

220V=49.2W

110V=260.1W

220V=257.1W

887.50

SG250X-4 8

EEE, Energy Detect, Short Reach

110V=46.0W

220V=45.6W

–

156.96

SG250X-48P

EEE, Energy Detect, Short Reach

110V=68.4W

220V=70.3W

110V=502.3W

220V=487.1W

1,713.92

Ports

Model name

Total system ports

RJ-45 ports

Combo ports (RJ-45 + SFP)

SF250-24

24 Fast Ethernet + 
4 Gigabit Ethernet

24 Fast Ethernet

2 Gigabit Ethernet combo + 2 SFP

SF250-24P

24 Fast Ethernet + 
4 Gigabit Ethernet

24 Fast Ethernet

2 Gigabit Ethernet combo + 2 SFP

SF250-48

48 Fast Ethernet + 
4 Gigabit Ethernet

48 Fast Ethernet

2 Gigabit Ethernet combo + 2 SFP

SF250-48HP

48 Fast Ethernet + 
4 Gigabit Ethernet

48 Fast Ethernet

2 Gigabit Ethernet combo + 2 SFP

SG250-08

8 Gigabit Ethernet

8 Gigabit Ethernet

–

SG250-08HP

8 Gigabit Ethernet

8 Gigabit Ethernet

–

SG250-10P

10 Gigabit Ethernet

8 Gigabit Ethernet

2 Gigabit Ethernet combo

SG250-18

18 Gigabit Ethernet

16 Gigabit Ethernet

2 Gigabit Ethernet combo

SG250-26

26 Gigabit Ethernet

24 Gigabit Ethernet

2 Gigabit Ethernet combo

SG250-26HP

26 Gigabit Ethernet

24 Gigabit Ethernet

2 Gigabit Ethernet combo

SG250-26P

26 Gigabit Ethernet

24 Gigabit Ethernet

2 Gigabit Ethernet combo

SG250-50

50 Gigabit Ethernet

48 Gigabit Ethernet

2 Gigabit Ethernet combo

SG250-50HP

50 Gigabit Ethernet

48 Gigabit Ethernet

2 Gigabit Ethernet combo

SG250-50P

50 Gigabit Ethernet

48 Gigabit Ethernet

2 Gigabit Ethernet combo

SG250X-24

24 Gigabit Ethernet + 
4 10 Gigabit Ethernet

24 Gigabit Ethernet

2 10 Gigabit Ethernet copper + 
2 SFP+

SG250X-24P

24 Gigabit Ethernet + 
4 10 Gigabit Ethernet

24 Gigabit Ethernet

2 10 Gigabit Ethernet copper + 
2 SFP+

SG250X-48

48 Gigabit Ethernet + 
4 10 Gigabit Ethernet

48 Gigabit Ethernet

2 10 Gigabit Ethernet copper + 
2 SFP+

SG250X-48P

48 Gigabit Ethernet + 
4 10 Gigabit Ethernet

48 Gigabit Ethernet

2 10 Gigabit Ethernet copper + 
2 SFP+

USB slot

USB Type-A 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

All numbers are aggregate across all ports because the buffers are dynamically shared:

Model name

Packet buffer

SF250-24

12 Mb

SF250-24P

12 Mb

SF250-48

24 Mb

SF250-48HP

24 Mb

SG250-08

12 Mb

SG250-08HP

12 Mb

SG250-10P

12 Mb

SG250-18

12 Mb

SG250-26

12 Mb

SG250-26HP

12 Mb

SG250-26P

12 Mb

SG250-50

24 Mb

SG250-50HP

24 Mb

SG250-50P

24 Mb

SG250X-24

12 Mb

SG250X-24P

12 Mb

SG250X-48

24 Mb

SG250X-48P

24 Mb

Power

100 to 240V 50 to 60 Hz, internal, universal: SF250-24, SF250-24P, SF250-48, SF250-48HP, SG250-26, SG250-26HP, SG250-26P, SG250-50, SG250-50HP, SG250-50P, SG250X-24, SG250X-24P, SG250X-48, SG250X-48P

100 to 240V 50 to 60 Hz, external: SG250-08, SG250-08HP, SG250-10P

Certification

UL (UL 60950), CSA (CSA 22.2), CE mark, FCC Part 15 (CFR 47) Class A

Operating temperature

32° to 122°F (0° to 50°C)

Storage temperature

-4° to 158°F (-20° to 70°C)

Operating humidity

10% to 90%, relative, noncondensing

Storage humidity

10% to 90%, relative, noncondensing

Warranty

Limited lifetime

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