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Cisco SG250-26 26 Port Gigabit Switch

Cisco SG250-26 26 Port Gigabit Switch
  • Cisco SG250-26 26 Port Gigabit Switch
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Specifications

  • Product Name:
    Cisco SG250-26 26 Port Gigabit Switch
  • Model Number:
    SG250-26-K9-AU
  • Brand:
  • Manufacturer Warranty:
    12 Months
  • Description

    Cisco SG250-26 26 Port Gigabit Switch


    Next-generation 250 Series Smart Switches combine powerful performance and reliability with a suite of features that you need for a solid business network. With Smart Network Application, FindIT Network Manager, and Network Plug and Play (PnP) support, you can deploy and configure a complete business network in minutes.


    Cisco SG250-26 26 Port Gigabit Switch

    Specifications


    Feature

    Description


    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)


    SG250-26

    38.69

    52.0


    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)

    ●  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

    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)


    Standard MIBs

    lldp-MIB

    lldpextdot1-MIB

    lldpextdot3-MIB

    lldpextmed-MIB

    rfc2674-MIB

    rfc2575-MIB

    rfc2573-MIB

    rfc2233-MIB

    rfc2013-MIB

    rfc2012-MIB

    rfc2011-MIB

    RFC-1212

    RFC-1215

    SNMPv2-CONF

    SNMPv2-TC

    p-bridge-MIB

    q-bridge-MIB

    rfc1389-MIB

    rfc1493-MIB

    rfc1611-MIB

    rfc1612-MIB

    rfc1850-MIB

    rfc1907-MIB

    rfc2571-MIB

    rfc2572-MIB

    rfc2574-MIB

    rfc2576-MIB

    rfc2613-MIB

    rfc2665-MIB

    rfc2668-MIB

    rfc2737-MIB

    rfc2925-MIB

    rfc3621-MIB

    rfc4668-MIB

    rfc4670-MIB

    trunk-MIB

    tunnel-MIB

    udp-MIB

    draft-ietf-bridge-8021x-MIB

    draft-ietf-bridge-rstpmib-04-MIB

    draft-ietf-hubmib-etherif-mib-v3-00-MIB

    draft-ietf-syslog-device-MIB

    ianaaddrfamnumbers-MIB

    ianaifty-MIB

    ianaprot-MIB

    inet-address-MIB

    ip-forward-MIB

    ip-MIB

    RFC1155-SMI

    RFC1213-MIB

    SNMPv2-MIB

    SNMPv2-SMI

    SNMPv2-TM

    RMON-MIB

    rfc1724-MIB

    dcb-raj-DCBX-MIB-1108-MIB

    rfc1213-MIB

    rfc1757-MIB




    Private MIBs

    CISCOSB-lldp-MIB

    CISCOSB-brgmulticast-MIB

    CISCOSB-bridgemibobjects-MIB

    CISCOSB-bonjour-MIB

    CISCOSB-dhcpcl-MIB

    CISCOSB-MIB

    CISCOSB-wrandomtaildrop-MIB

    CISCOSB-traceroute-MIB

    CISCOSB-telnet-MIB

    CISCOSB-stormctrl-MIB

    CISCOSBssh-MIB

    CISCOSB-socket-MIB

    CISCOSB-sntp-MIB

    CISCOSB-smon-MIB

    CISCOSB-phy-MIB

    CISCOSB-multisessionterminal-MIB

    CISCOSB-mri-MIB

    CISCOSB-jumboframes-MIB

    CISCOSB-gvrp-MIB

    CISCOSB-endofmib-MIB

    CISCOSB-dot1x-MIB

    CISCOSB-deviceparams-MIB

    CISCOSB-cli-MIB

    CISCOSB-cdb-MIB

    CISCOSB-brgmacswitch-MIB

    CISCOSB-3sw2swtables-MIB

    CISCOSB-smartPorts-MIB

    CISCOSB-tbi-MIB

    CISCOSB-macbaseprio-MIB

    CISCOSB-env_mib-MIB

    CISCOSB-policy-MIB

    CISCOSB-sensor-MIB

    CISCOSB-aaa-MIB

    CISCOSB-application-MIB

    CISCOSB-bridgesecurity-MIB

    CISCOSB-copy-MIB

    CISCOSB-CpuCounters-MIB

    CISCOSB-Custom1BonjourService-MIB

    CISCOSB-dhcp-MIB

    CISCOSB-dlf-MIB

    CISCOSB-dnscl-MIB

    CISCOSB-embweb-MIB

    CISCOSB-fft-MIB

    CISCOSB-file-MIB

    CISCOSB-greeneth-MIB

    CISCOSB-greeneth-MIB

    CISCOSB-interfaces-MIB

    CISCOSB-interfaces_recovery-MIB

    CISCOSB-ip-MIB

    CISCOSB-iprouter-MIB

    CISCOSB-ipv6-MIB

    CISCOSB-mnginf-MIB

    CISCOSB-lcli-MIB

    CISCOSB-localization-MIB

    CISCOSB-mcmngr-MIB

    CISCOSB-mng-MIB

    CISCOSB-physdescription-MIB

    CISCOSB-PoE-MIB

    CISCOSB-protectedport-MIB

    CISCOSB-rmon-MIB

    CISCOSB-rs232-MIB

    CISCOSB-SecuritySuite-MIB

    CISCOSB-snmp-MIB

    CISCOSB-specialbpdu-MIB

    CISCOSB-banner-MIB

    CISCOSB-syslog-MIB

    CISCOSB-TcpSession-MIB

    CISCOSB-traps-MIB

    CISCOSB-trunk-MIB

    CISCOSB-tuning-MIB

    CISCOSB-tunnel-MIB

    CISCOSB-udp-MIB

    CISCOSB-vlan-MIB

    CISCOSB-ipstdacl-MIB

    CISCOSB-eee-MIB

    CISCOSB-ssl-MIB

    CISCOSB-digitalkeymanage-MIB

    CISCOSB-qosclimib-MIB

    CISCOSB-digitalkeymanage-MIB

    CISCOSB-tbp-MIB

    CISCOSMB-MIB

    CISCOSB-secsd-MIB

    CISCOSB-draft-ietf-entmib-sensor-MIB

    CISCOSB-draft-ietf-syslog-device-MIB

    CISCOSB-rfc2925-MIB

    CISCO-SMI-MIB

    CISCOSB-DebugCapabilities-MIB

    CISCOSB-CDP-MIB

    CISCOSB-vlanVoice-MIB

    CISCOSB-EVENTS-MIB

    CISCOSB-sysmng-MIB

    CISCOSB-sct-MIB

    CISCO-TC-MIB

    CISCO-VTP-MIB

    CISCO-CDP-MIB








































    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


    Embedded FindIT Network Probe

    Support for embedded FindIT Network Probe running on the switch.   Eliminates the need to set up a separate hardware or virtual machine for the   FindIT Network Probe on site


    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)


    SG250-26

    EEE, Energy Detect, Short Reach

    110V=18.1W

    220V=18.9W

    64.49


    Ports

    Model name

    Total system ports

    RJ-45 ports

    Combo ports (RJ-45 + SFP)


    SG250-26

    26 Gigabit Ethernet

    24 Gigabit Ethernet

    2 Gigabit Ethernet combo


    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








    SG250-26

    12 Mb


    Supported SFP/SFP+ modules

    SKU

    Media

    Speed

    Maximum distance


    MGBBX1

    Single-mode fiber

    1000 Mbps

    10 km


    MGBSX1

    Multimode fiber

    1000 Mbps

    500 m


    MGBLH1

    Single-mode fiber

    1000 Mbps

    40 km


    MGBLX1

    Single-mode fiber

    1000 Mbps

    10 km


    MGBT1

    UTP cat 5e

    1000 Mbps

    100 m


    GLC-LH-SMD=

    Single-mode fiber

    1000 Mbps

    10 km


    GLC-BX-U=

    Single-mode fiber

    1000 Mbps

    10 km


    SFP-H10GB-CU1M

    Copper coax

    10 Gig

    1 m


    SFP-H10GB-CU3M

    Copper coax

    10 Gig

    3 m


    SFP-H10GB-CU5M

    Copper coax

    10 Gig

    5 m


    SFP-10G-SR

    Multimode fiber

    10 Gig

    26 m - 400 m


    SFP-10G-LR

    Single-mode fiber

    10 Gig

    10 km


    SFP-10G-SR-S

    Multimode fiber

    10 Gig

    26 m - 400 m


    SFP-10G-LR-S

    Single-mode fiber

    10 Gig

    10 km


    Environmental


    Unit dimensions (W x H x D)

    Model name

    Unit dimensions


    SG250-26

    440 x 44 x 202 mm (17.3 x 1.45 x 7.95 in)


    Unit weight

    Model name

    Unit weight



    SG250-26

    2.72 kg (6.0 lb)


    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


    Acoustic noise and Mean Time Between Failures (MTBF)

    Model name

    Fan (number)

    Acoustic noise

    MTBF at 50°C (hours)


    SF250-24

    No fan

    630,719


    SF250-24P

    2

    0° to 25°C: 39.7dB

    50°C: 52.2dB

    314,040


    SF250-48

    No fan

    256,281


    SF250-48HP

    2

    0° to 30°C: 38.0dB

    50°C: 52.7dB

    286,555


    SG250-08

    No fan

    1,305,509


    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)

    ●  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

    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)


    Standard MIBs

    lldp-MIB

    lldpextdot1-MIB

    lldpextdot3-MIB

    lldpextmed-MIB

    rfc2674-MIB

    rfc2575-MIB

    rfc2573-MIB

    rfc2233-MIB

    rfc2013-MIB

    rfc2012-MIB

    rfc2011-MIB

    RFC-1212

    RFC-1215

    SNMPv2-CONF

    SNMPv2-TC

    p-bridge-MIB

    q-bridge-MIB

    rfc1389-MIB

    rfc1493-MIB

    rfc1611-MIB

    rfc1612-MIB

    rfc1850-MIB

    rfc1907-MIB

    rfc2571-MIB

    rfc2572-MIB

    rfc2574-MIB

    rfc2576-MIB

    rfc2613-MIB

    rfc2665-MIB

    rfc2668-MIB

    rfc2737-MIB

    rfc2925-MIB

    rfc3621-MIB

    rfc4668-MIB

    rfc4670-MIB

    trunk-MIB

    tunnel-MIB

    udp-MIB

    draft-ietf-bridge-8021x-MIB

    draft-ietf-bridge-rstpmib-04-MIB

    draft-ietf-hubmib-etherif-mib-v3-00-MIB

    draft-ietf-syslog-device-MIB

    ianaaddrfamnumbers-MIB

    ianaifty-MIB

    ianaprot-MIB

    inet-address-MIB

    ip-forward-MIB

    ip-MIB

    RFC1155-SMI

    RFC1213-MIB

    SNMPv2-MIB

    SNMPv2-SMI

    SNMPv2-TM

    RMON-MIB

    rfc1724-MIB

    dcb-raj-DCBX-MIB-1108-MIB

    rfc1213-MIB

    rfc1757-MIB




    Private MIBs

    CISCOSB-lldp-MIB

    CISCOSB-brgmulticast-MIB

    CISCOSB-bridgemibobjects-MIB

    CISCOSB-bonjour-MIB

    CISCOSB-dhcpcl-MIB

    CISCOSB-MIB

    CISCOSB-wrandomtaildrop-MIB

    CISCOSB-traceroute-MIB

    CISCOSB-telnet-MIB

    CISCOSB-stormctrl-MIB

    CISCOSBssh-MIB

    CISCOSB-socket-MIB

    CISCOSB-sntp-MIB

    CISCOSB-smon-MIB

    CISCOSB-phy-MIB

    CISCOSB-multisessionterminal-MIB

    CISCOSB-mri-MIB

    CISCOSB-jumboframes-MIB

    CISCOSB-gvrp-MIB

    CISCOSB-endofmib-MIB

    CISCOSB-dot1x-MIB

    CISCOSB-deviceparams-MIB

    CISCOSB-cli-MIB

    CISCOSB-cdb-MIB

    CISCOSB-brgmacswitch-MIB

    CISCOSB-3sw2swtables-MIB

    CISCOSB-smartPorts-MIB

    CISCOSB-tbi-MIB

    CISCOSB-macbaseprio-MIB

    CISCOSB-env_mib-MIB

    CISCOSB-policy-MIB

    CISCOSB-sensor-MIB

    CISCOSB-aaa-MIB

    CISCOSB-application-MIB

    CISCOSB-bridgesecurity-MIB

    CISCOSB-copy-MIB

    CISCOSB-CpuCounters-MIB

    CISCOSB-Custom1BonjourService-MIB

    CISCOSB-dhcp-MIB

    CISCOSB-dlf-MIB

    CISCOSB-dnscl-MIB

    CISCOSB-embweb-MIB

    CISCOSB-fft-MIB

    CISCOSB-file-MIB

    CISCOSB-greeneth-MIB

    CISCOSB-greeneth-MIB

    CISCOSB-interfaces-MIB

    CISCOSB-interfaces_recovery-MIB

    CISCOSB-ip-MIB

    CISCOSB-iprouter-MIB

    CISCOSB-ipv6-MIB

    CISCOSB-mnginf-MIB

    CISCOSB-lcli-MIB

    CISCOSB-localization-MIB

    CISCOSB-mcmngr-MIB

    CISCOSB-mng-MIB

    CISCOSB-physdescription-MIB

    CISCOSB-PoE-MIB

    CISCOSB-protectedport-MIB

    CISCOSB-rmon-MIB

    CISCOSB-rs232-MIB

    CISCOSB-SecuritySuite-MIB

    CISCOSB-snmp-MIB

    CISCOSB-specialbpdu-MIB

    CISCOSB-banner-MIB

    CISCOSB-syslog-MIB

    CISCOSB-TcpSession-MIB

    CISCOSB-traps-MIB

    CISCOSB-trunk-MIB

    CISCOSB-tuning-MIB

    CISCOSB-tunnel-MIB

    CISCOSB-udp-MIB

    CISCOSB-vlan-MIB

    CISCOSB-ipstdacl-MIB

    CISCOSB-eee-MIB

    CISCOSB-ssl-MIB

    CISCOSB-digitalkeymanage-MIB

    CISCOSB-qosclimib-MIB

    CISCOSB-digitalkeymanage-MIB

    CISCOSB-tbp-MIB

    CISCOSMB-MIB

    CISCOSB-secsd-MIB

    CISCOSB-draft-ietf-entmib-sensor-MIB

    CISCOSB-draft-ietf-syslog-device-MIB

    CISCOSB-rfc2925-MIB

    CISCO-SMI-MIB

    CISCOSB-DebugCapabilities-MIB

    CISCOSB-CDP-MIB

    CISCOSB-vlanVoice-MIB

    CISCOSB-EVENTS-MIB

    CISCOSB-sysmng-MIB

    CISCOSB-sct-MIB

    CISCO-TC-MIB

    CISCO-VTP-MIB

    CISCO-CDP-MIB








































    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


    Embedded FindIT Network Probe

    Support for embedded FindIT Network Probe running on the switch.   Eliminates the need to set up a separate hardware or virtual machine for the   FindIT Network Probe on site


    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


    SG250-26P

    195W

    24


    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?


    SG250-26

    EEE, Energy Detect, Short Reach

    110V=18.1W

    220V=18.9W

    64.49


    Ports

    Model name

    Total system ports

    RJ-45 ports

    Combo ports (RJ-45 + SFP)


    SG250-26

    26 Gigabit Ethernet

    24 Gigabit Ethernet

    2 Gigabit Ethernet combo


    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


    SG250-26

    12 Mb


    Supported SFP/SFP+ modules

    SKU

    Media

    Speed

    Maximum distance


    MGBBX1

    Single-mode fiber

    1000 Mbps

    10 km


    MGBSX1

    Multimode fiber

    1000 Mbps

    500 m


    MGBLH1

    Single-mode fiber

    1000 Mbps

    40 km


    MGBLX1

    Single-mode fiber

    1000 Mbps

    10 km


    MGBT1

    UTP cat 5e

    1000 Mbps

    100 m


    GLC-LH-SMD=

    Single-mode fiber

    1000 Mbps

    10 km


    GLC-BX-U=

    Single-mode fiber

    1000 Mbps

    10 km


    SFP-H10GB-CU1M

    Copper coax

    10 Gig

    1 m


    SFP-H10GB-CU3M

    Copper coax

    10 Gig

    3 m


    SFP-H10GB-CU5M

    Copper coax

    10 Gig

    5 m


    SFP-10G-SR

    Multimode fiber

    10 Gig

    26 m - 400 m


    SFP-10G-LR

    Single-mode fiber

    10 Gig

    10 km


    SFP-10G-SR-S

    Multimode fiber

    10 Gig

    26 m - 400 m


    SFP-10G-LR-S

    Single-mode fiber

    10 Gig

    10 km


    Environmental


    Unit dimensions (W x H x D)

    Model name

    Unit dimensions


    SG250-26

    440 x 44 x 202 mm (17.3 x 1.45 x 7.95 in)


    Unit weight

    Model name

    Unit weight



    SG250-26

    2.72 kg (6.0 lb)


    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


    Acoustic noise and Mean Time Between Failures (MTBF)

    Model name

    Fan (number)

    Acoustic noise

    MTBF at 50°C (hours)


    SG250-26

    No fan

    343,592


    Warranty

    Limited lifetime


    Package contents


    ●  Cisco   250 Series Smart Switch

    ●  Power   cord (power adapter for 8-port and 10-port SKUs)

    ●  Mounting   kit

    ●  Quick   Start Guide


    Minimum requirements


    ●  Web   browser: Mozilla Firefox version 36 or later; Microsoft Internet Explorer   version 9 or later, Chrome version 40 or later, Safari version 5 or later

    ●  Category   5 Ethernet network cable

    ●  TCP/IP,   network adapter, and network operating system (such as Microsoft Windows,   Linux, or Mac OS X) installed



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