SG250-50HP Коммутатор Cisco Small Business

Производитель

Cisco

Part Number

SG250-50HP

VLAN

Support for up to 256 active VLANs simultaneously

Рабочая температура

32° to 122°F (0° to 50°C)

Тип кабеля

Unshielded Twisted Pair (UTP) Category 5 or better for 10BASE-T/100BASE-TX; UTP Category 5e or better for 1000BASE-T

Flash

256 MB

Feature

Description

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

SSL

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

802.3at PoE+ and 802.3af PoE delivered over any of the RJ-45 por

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

AC Power

Yes

Access Control Lists

Support for up to 512 rules

Acoustic noise and Mean Time Between Failures

Model name

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

Autoconfiguration with SCP file download

Enables mass deployment with protection of sensitive data

Bonjour

The switch advertises itself using the Bonjour protocol

Buttons

Reset button

Certification

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

Congestion avoidance

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

CPU

800 MHz ARM

CPU memory

512 MB

DHCP relay at Layer 3

Relay of DHCP traffic across IP domains

Disable port LEDs

LEDs can be manually turned off to save on energy

DoS prevention

Denial-of-Service (DoS) attack prevention

EEE compliant

Supports IEEE 802.3az on all copper Gigabit Ethernet ports

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

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

Firmware upgrade

Web browser upgrade (HTTP/HTTPS) and TFTP and upgrade over SCP running over SSH

Generic VLAN Registration Protocol and Generic Attribute R

Protocols for automatically propagating and configuring VLANs in a bridged domain

GLC-BX-U=

1000 Mbps

HOL blocking

Head-Of-Line (HOL) blocking

IPv4 and IPv6 dual stack

Coexistence of both protocol stacks to ease migration

IPv4 маршрутизация

Wire-speed routing of IPv4 packets

IPv6

IPv6 host mode

IPv6 ACL

Drop or rate limit IPv6 packets in hardware

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 QoS

Prioritize IPv6 packets in hardware

IPv6 RFCs supported

RFC 4443 (which obsoletes RFC 2463) ICMPv6

IPv6 маршрутизация

Wire-speed routing of IPv6 packets

Jumbo frames

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

Layer 3 interface

Configuration of Layer 3 interface on physical port, LAG, VLAN interface, or loopback interface

LEDs

System, Link/Act, PoE, Speed

Link Layer Discovery Protocol (LLDP) with LLDP-MED ext

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

Localization

Localization of GUI and documentation into multiple languages

Login banner

Configurable multiple banners for web as well as CLI

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

Multicast Listener Discovery snooping

Deliver IPv6 multicast packets only to the required receivers

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

Packet buffer

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

Port grouping/link aggregation

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

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

Port security

Ability to lock source MAC addresses to ports and limit the number of learned MAC addresses

Priority levels

8 hardware queues

Private MIBs

CISCOSB-lldp-MIB

RADIUS

Supports RADIUS authentication for management access. Switch functions as a client

Rate limiting

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

Remote monitoring

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

Scheduling

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

Secure Copy

Securely transfers files to and from the switch

Secure Core Technology

Ensures that the switch will receive and process management and protocol traffic no matter how much traffic is received

Secure Sensitive Data

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

Secure Shell Protocol

SSH is a secure replacement for Telnet traffic. Secure Copy (SCP) also uses SSH. SSH v1 and v2 are supported

SF250-24P

0° to 25°C 39.7dB

SF250-48HP

0° to 30°C 38.0dB

SG250-08HP

8 Gigabit Ethernet

SG250-26

–

SG250-26HP

0° to 30°C 37.5dB

SG250-26P

0° to 30°C 36.0dB

SG250-50HP

0° to 30°C 34.2dB

SG250-50P

0° to 30°C 35.6dB

SG250X-24

0° to 30°C 32.6dB

SG250X-24P

0° to 30°C 35.1dB

SG250X-48

0° to 30°C 36.6dB

SG250X-48P

0° to 30°C 35.9dB

Smart Network Application

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

Smartports

Simplified configuration of QoS and security capabilities

SNMP

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

Standard MIBs

lldp-MIB

Storage humidity

10% to 90%, relative, noncondensing

Storm Control

Broadcast, multicast, and unknown unicast

STP loopback guard

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

Supported SFP/SFP+ modules

SKU

Text-editable configs

Config files can be edited with a text editor and downloaded to another switch, facilitating easier mass deployment

Textview Command-Line Interface

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

Time-based PoE

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

Time-based port operation

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

USB slot

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

User Datagram Protocol relay

Relay of broadcast information across Layer 3 domains for application discovery or relaying of bootP/DHCP packets

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

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

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

Температура хранения

-4° to 158°F (-20° to 70°C)

Мощность

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

Длина

54.5 см

Ширина

53.5 см

Высота

22 см

Вес

0.9 кг