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Артикул: WS-C2950G-48-EI
Коммутатор, L2, 48 портов 10/100BASE-T, 2 порта 1000BASE-X (GBIC), фильтрация L2-L4
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Superior Redundancy for Fault Backup

• IEEE 802.1D Spanning Tree Protocol support for redundant backbone connections and loop-free networks simplifies network configuration and improves fault tolerance.

• IEEE 802.1w Rapid Spanning- Tree Protocol (RSTP) provides rapid convergence of the spanning tree, independent of spanning-tree timers.

• Per VLAN Rapid Spanning Tree (PVRST+) allows rapid spanning-tree reconvergence on a per-VLAN spanning-tree basis, without requiring the implementation of spanning-tree instances.

• Support for Cisco Spanning Tree Protocol enhancements such as UplinkFast, BackboneFast, and PortFast technologies ensures quick failover recovery and enhances overall network stability and availability.

• Support for Cisco's optional RPS 675, 675-watt redundant AC power system, which provides a backup power source for one of six switches, for improved fault tolerance and network uptime.

• Unidirectional link detection (UDLD) and aggressive UDLD detect and disable unidirectional links on fiber-optic interfaces caused by incorrect fiber-optic wiring or port faults.

Integrated Cisco IOS Software Features for Bandwidth Optimization

• Bandwidth aggregation through Cisco EtherChannel technology enhances fault tolerance and offers higher-speed aggregated bandwidth between switches to routers and individual servers. Port Aggregation Protocol (PagP) is available to simplify configuration.

• VLAN1 minimization allows VLAN1 to be disabled on any individual VLAN trunk link.

• IEEE 802.1s Multiple Spanning Tree Protocol (MSTP) allows a spanning-tree instance per VLAN, enabling Layer 2 load sharing on redundant links.

• Per-port broadcast, multicast, and unicast storm control prevents faulty end stations from degrading overall system performance.

• Per VLAN Spanning Tree Plus (PVST+) allows for Layer 2 load sharing on redundant links to efficiently use the extra capacity inherent in a redundant design.

• VLAN Trunking Protocol (VTP) pruning limits bandwidth consumption on VTP trunks by flooding broadcast traffic only on trunk links required to reach the destination devices. Dynamic Trunking Protocol (DTP) enables dynamic trunk configuration across all ports in the switch.

• IGMPv3 snooping provides for fast client joins and leaves of multicast streams and limits bandwidth-intensive video traffic to the requestors. MVR, IGMP filtering, and fast-join and immediate leave are available as enhancements. IGMP Snooping time can be adjusted to optimize the performance of multicast data flows.


Networkwide Security Features

• A private VLAN edge provides security and isolation between ports on a switch, ensuring that voice traffic travels directly from its entry point to the aggregation device through a virtual path and cannot be directed to a different port.

• Support for the 802.1x standard allows users to be authenticated regardless of which LAN ports they are accessing, and it provides unique benefits to customers who have a large base of mobile (wireless) users accessing the network.

–802.1x with voice VLAN permits an IP phone access to the voice VLAN regardless of the authorized or unauthorized state of the port.

–802.1x with Port Security authenticates the port and manages network access for all MAC addresses, including that of the client.

–IEEE 802.1x with Guest VLAN allows guests without 802.1x clients to have limited network access on the Guest VLAN.

–IEEE 802.1x with VLAN assignment allows a dynamic VLAN assignment for a specific user regardless of where the user is connected.

• SSHv2 provides network security by encrypting administrator traffic during Telnet sessions. SSHv2 requires a special cryptographic software image due to US export restrictions

• Port Security secures the access to a port based on the MAC address of a user's device. The aging feature removes the MAC address from the switch after a specific time to allow another device to connect to the same port.

• MAC Address Notification allows administrators to be notified of new users added or removed from the network.

• Multilevel security on console access prevents unauthorized users from altering the switch configuration.

• Trusted Boundary provides the ability to trust the QoS priority settings if an IP phone is present and disable the trust setting in the event that the IP phone is removed, thereby preventing a rogue user from overriding prioritization policies in the network.

• TACACS+ and RADIUS authentication enables centralized control of the switch and restricts unauthorized users from altering the configuration.

• SPAN support of Intrusion Detection Systems (IDSs) to monitor, repel, and report network security violations

• SNMPv3 (non-crypto) monitors and controls network devices, manages configurations, statistics collection, performance, and security.

• Cisco Network Assistant software security wizards ease the deployment of security features for restricting user access to a server, a portion of the network, or access to the network.

Quality of Service

Layer 2 QoS

• Support for reclassifying frames is based either on 802.1p class-of-service (CoS) value or default CoS value per port assigned by network manager.

• Four queues per egress port are supported in hardware.

• The Weighted Round Robin (WRR) scheduling algorithm ensures that low-priority queues are not starved.

• Strict priority queue configuration via Strict Priority Scheduling ensures that time-sensitive applications such as voice always follow an expedited path through the switch fabric.


Superior Manageability

• SNMP and Telnet interface support delivers comprehensive in-band management, and a CLI management console provides detailed out-of-band management.

• An embedded Remote Monitoring (RMON) software agent supports four RMON groups (history, statistics, alarms, and events) for enhanced traffic management, monitoring, and analysis.

• A Switched Port Analyzer (SPAN) port can mirror traffic from one or many ports to another port for monitoring all nine RMON groups with an RMON probe or network analyzer.

• Trivial File Transfer Protocol (TFTP) reduces the cost of administering software upgrades by downloading from a centralized location.

• Network Timing Protocol (NTP) provides an accurate and consistent timestamp to all switches within the intranet.

• Layer 2 traceroute eases troubleshooting by identifying the physical path that a packet takes from the source device to a destination device.

• Multifunction LEDs per port for port status, half-duplex/full-duplex, 10BASE-T/100BASE-TX/1000BASE-T indication, as well as switch-level status LEDs for system, redundant power supply, and bandwidth utilization provide a comprehensive and convenient visual management system.

• Crash information support enables a switch to generate a crash file for improved troubleshooting.

• Show-interface-capabilities provide information about the configuration capabilities of any interface.

• Response Time Monitoring (RTTMON) MIB allows users to monitor network performance between a Cisco Catalyst switch and a remote device.

Cisco Network Assistant Software

• Cisco Network Assistant Software is a free, standalone network management application software that simplifies the administration of networks of up to 250 users. It supports a wide range of Cisco Catalyst intelligent switches from Cisco Catalyst 2950 through Cisco Catalyst 4506. With Cisco Network Assistant, users can manage Cisco Catalyst switches plus launch the device managers of Cisco integrated services routers (ISRs) and Cisco Aironet WLAN access points by simply clicking on its icon in the topology map.

• Cisco AVVID (Architecture for Voice, Video and Integrated Data) wizards use just a few user inputs to automatically configure the switch to optimally handle different types of traffic: voice, video, multicast, and high-priority data.

• One-click software upgrades can be performed across the entire cluster simultaneously, and configuration cloning enables rapid deployment of networks.

• Cisco Network Assistant Guide Mode helps users configure powerful advanced features by providing step-by-step instructions.

• Cisco Network Assistant provides enhanced online help for context-sensitive assistance.

• Easy-to-use graphical interface provides both a topology map and front-panel view of the switches.

• Multidevice- and multiport-configuration capabilities allow network administrators to save time by configuring features across multiple switches and ports simultaneously.

• User-personalized interface allows users to modify polling intervals, table views, and other settings within Cisco Network Assistant and retain these settings the next time they use Cisco Network Assistant.

• Alarm notification provides automated e-mail notification of network errors and alarm thresholds.

Support for CiscoWorks

• Manageability is enabled through CiscoWorks network management software on a per-port and per-switch basis, providing a common management interface for Cisco routers, switches, and hubs.

• SNMPv1, v2, and v3 (non-cryptographic) and Telnet interface support delivers comprehensive in-band management, and a command-line-interface (CLI) management console provides detailed out-of-band management.

• Cisco Discovery Protocol (CDP) versions 1 and 2 enable a CiscoWorks network management station to automatically discover the switch in a network topology.

• Support is provided by the CiscoWorks LAN Management Solution.

Ease of Use and Deployment

• Cisco Device Manager is an embedded web-based software that allows the customer to easily configure and troubleshoot the switch, eliminating the need for more complex terminal emulation programs and CLI knowledge, and reducing the cost of deployment by enabling less-skilled personnel to quickly and simply set up switches.

• Cisco Express Setup allows the customer to quickly and easily initialize a switch with a web browser

• Smartports offers a set of verified feature macros per connection type in an easy-to-apply manner. With these macros, users can consistently and reliably configure essential security, availability, quality of service, and manageability features recommended for Cisco Business Ready Campus solutions with minimal effort and expertise.

• Auto-configuration eases deployment of switches in the network by automatically configuring multiple switches across a network using a bootp server.

• Autosensing on each port detects the speed of the attached device and automatically configures the port for 10 or 100 Mbps operation, easing the deployment of the switch in mixed-speed environments.

• Auto-negotiating on all ports automatically selects half- or full-duplex transmission mode to optimize bandwidth.

• Link Aggregation Control Protocol (LACP) allows the creation of Ethernet channeling with devices that conform to IEEE 802.3ad. This is similar to Cisco EtherChannel and PagP.

• Cisco Discovery Protocol versions 1 and 2 enable a CiscoWorks network management station to automatically discover the switch in a network topology.

• Cisco VTP supports dynamic VLANs and dynamic trunk configuration across all switches.

• Support for dynamic VLAN assignment through implementation of VLAN Membership Policy Server (VMPS) client functions provides flexibility in assigning ports to VLANs.

• Voice VLAN simplifies telephony installations by keeping voice traffic on a separate VLAN for easier network administration and troubleshooting.

• The default configuration stored in Flash memory ensures that the switch can be quickly connected to the network and can pass traffic with minimal user intervention.





• 13.6-Gbps switching fabric (Catalyst 2950T-48-SI and 2950SX-48-SI)

• 8.8-Gbps switching fabric (Catalyst 2950SX-24, 2950-24, 2950-12)

• Cisco Catalyst 2950-12: 2.4 Gbps maximum forwarding bandwidth

• Cisco Catalyst 2950-24: 4.8 Gbps maximum forwarding bandwidth

• Cisco Catalyst 2950SX-24: 8.8 Gbps maximum forwarding bandwidth

• Cisco Catalyst 2950T-48: 13.6 Gbps maximum forwarding bandwidth

• Cisco Catalyst 2950SX-48: 13.6 Gbps maximum forwarding bandwidth (Forwarding rates based on 64 byte packets)

• Cisco Catalyst 2950-12: 1.8 Mpps wire-speed forwarding rate

• Cisco Catalyst 2950-24: 3.6 Mpps wire-speed forwarding rate

• Cisco Catalyst 2950SX-24: 6.6 Mpps wire-speed forwarding rate

• Cisco Catalyst 2950T-48: 10.1 Mpps wire-speed forwarding rate

• Cisco Catalyst 2950SX-48: 10.1 Mpps wire-speed forwarding rate

• 8 MB packet buffer memory architecture shared by all ports

• 16 MB DRAM and 8 MB Flash memory

• Configurable up to 8000 MAC addresses



Description/Part Numbers



• CISCO-2900-MIB




























• IANAifType-MIB

• IF-MIB (RFC 1573)









• RFC1213-MIB (MIB-II)


• RMON-MIB (RFC 1757)

• RS-232-MIB







• IEEE 802.1x support

• IEEE 802.3x full duplex on 10BASE-T and 100BASE-TX ports

• IEEE 802.1D Spanning-Tree Protocol

• IEEE 802.1p class-of-service (CoS) prioritization

• IEEE 802.1Q VLAN

• IEEE 802.1s

• IEEE 802.1w

• IEEE 802.3 10BASE-T specification

• IEEE 802.3u 100BASE-TX specification

• IEEE 802.3ad

• IEEE 802.3z 1000BASE-X specification

Connectors and Cabling

• 10BASE-T ports: RJ-45 connectors, two-pair Category 3, 4, or 5 unshielded twisted-pair (UTP) cabling

• 100BASE-TX ports: RJ-45 connectors; four-pair Category 5 UTP cabling

• 1000BASE-SX ports: MT-RJ connectors, up to 1800 feet (550 meters) cable distance for 50/125 or up to 900 ft (275 m) cable distance for 62.5/125 micron multimode fiber-optic cabling

• Management console port: 8-pin RJ-45 connector, RJ-45-to-DB9 adapter cable for PC connections; for terminal connections, use RJ-45-to-DB25 female data-terminal-equipment (DTE) adapter (can be ordered separately, Cisco part number ACS-DSBUASYN=)

MT-RJ Patch Cables for Cisco Catalyst 2950SX 24 Switch

Type of cable, Cisco part number:

• 1-meter MT-RJ-to-SC multimode cable, CAB-MTRJ-SC-MM-1M

• 3-meter MT-RJ-to-SC multimode cable, CAB-MTRJ-SC-MM-3M

• 5-meter MT-RJ-to-SC multimode cable, CAB-MTRJ-SC-MM-5M

• 1-meter MT-RJ-to-ST multimode cable, CAB-MTRJ-ST-MM-1M

• 3-meter MT-RJ-to-ST multimode cable, CAB-MTRJ-ST-MM-3M

• 5-meter MT-RJ-to-ST multimode cable, CAB-MTRJ-ST-MM-5M

Power Connectors

Customers can provide power to a switch by using the internal power supply, the Cisco RPS 675 Redundant Power System. The connectors are located at the back of the switch.

• Internal power supply connector

–The internal power supply is an auto-ranging unit.

–The internal power supply supports input voltages between 100 and 240 VAC.

–Use the supplied AC power cord to connect the AC power connector to an AC power outlet.

• Cisco RPS 675 connector

–The connector offers connection for an optional Cisco RPS 675 that uses AC input and supplies DC output to the switch.

–The connector offers a 675W redundant power system that supports one of up to six external network devices and provides power to one failed device at a time.

–The connector automatically senses when the internal power supply of a connected device fails and provides power to the failed device, preventing loss of network traffic.

–Attach only the Cisco RPS 675 (Model PWR675-AC-RPS-NI=) to the redundant power supply receptacle with this connector.


• Per-port status LEDs: link integrity, disabled, activity, speed, and full-duplex indications

• System status LEDs: system, RPS, and bandwidth-utilization indications

Dimensions and Weight (H x W x D)

• 1.72 x 17.5 x 9.52 in. (4.36 x 44.45 x 24.18 cm) (Cisco Catalyst 2950SX-24, 2950-24, 2950-12)

• 1.72 x 17.5 x 13 in. (4.36 x 44.45 x 33.02 cm) (Cisco Catalyst 2950SX-48, 2950T-48)

• 1 RU high (1.72 in./4.36 cm)

• 6.5 lb (3.0 kg) (Cisco Catalyst 2950SX-24, 2950-24, 2950-12)

• 10.b lb (4.8 kg) (Cisco Catalyst 2950SX-48, 2950T-48)

Environmental Ranges

• Operating temperature: 32 to 113°F (0 to 45°C)

• Storage temperature: -13 to 158°F (-25 to 70°C)

• Operating relative humidity: 10-85% (non-condensing)

• Operating altitude: Up to 10,000 ft (3000 m)

• Storage altitude: Up to 15,000 ft (4500 m)

Power Requirements

• Power consumption: 30W (maximum), 102 BTUs per hour (Cisco Catalyst 2950SX-24, 2950-24. 2950-12)

• Power consumption: 45W (maximum), 154 BTUs per hour (Cisco Catalyst 2950T-48, 2950SX-48)

• AC input voltage: 100 to 127, 200 to 240 VAC (auto-ranging)

• AC input frequency: 47 to 63 Hz

• DC input voltages for Cisco RPS 675 and Cisco RPS 300: +12V at 4.5A

Acoustic Noise

ISO 7770, bystander position, operating to an ambient temperature of 86°F (30°C):

• WS-C2950-24, WS-C2950-12, WS-C2950SX-24: 46 dBa

• WS-C2950T-48-SI, WS-C2950SX-48-SI: 48 dBa

Predicted Mean Time Between Failure

• 398,240 hours (Cisco Catalyst 2950-24)

• 482,776 hours (Cisco Catalyst 2950-12)

• 480,346 hours (Cisco Catalyst 2950SX-24)

• 268,876 hours (Cisco Catalyst 2950T-48-SI)

• 274,916 hours (Cisco Catalyst 2950SX-48-SI)

Regulatory Agency Approvals

Safety Certifications

• UL 60950/CSA 22.2 No. 950

• IEC 60950/EN 60950

• AS/NZS 3260, TS001

• CE Marking

Electromagnetic Emissions Certifications

• FCC Part 15 Class A

• EN 55022: 1998 (CISPR 22) Class A

• EN 55022: 1998 (CISPR 22)

• VCCI Class A

• AS/NZS 3548 Class A

• CE Marking

• CNS 13438 Class A

• CLEI Code



• Lifetime limited warranty



Коммутаторы Cisco Catalyst WS-C2950G-48-EI (Cisco Catalyst 2950 Series Switch) – это стекируемые автономные коммутаторы с фиксированной конфигурацией, которые предназначены для инфраструктуры сетей Fast Ethernet и Gigabit Ethernet и обеспечивают производительность на скорости среды передачи. Коммутаторы поставляются с двумя типами программного обеспечения и в самых различных конфигурациях, благодаря чему можно подобрать подходящий вариант для любого предприятия малого и среднего бизнеса, а также удаленных филиалов и производственных сред. Программное обеспечение Standard Image предлагает базовые функции программного обеспечения Cisco IOS для передачи данных, голоса и видео. Для интеллектуальных сетей, которым требуются дополнительные функции безопасности, расширенные возможности управления качеством обслуживания и высокий уровень доступности на границе сети, предназначено программное обеспечение Enhanced Image (EI), включающее поддержку таких функций, как ограничение скорости и фильтрация трафика.

Бесплатно-распространяемое программное приложение Cisco Network Assistant для централизованного управления коммутаторами Catalyst серии 2950 упрощает администрирование коммутаторов, маршрутизаторов и беспроводных точек доступа Cisco. Cisco Network Assistant обладает понятным графическим интерфейсом для удобства конфигурирования, поиска и устранения неисправностей, а также включения и мониторинга элементов сети.

Основные особенности:
  • Высокая безопасность: поддерживаются функциональность Port SecurityPrivate VLAN Edge, протокол 802.1x, аутентификация пользователей на серверах TACACS+ или RADIUS. Серия Catalyst 2950 с ПО Enhanced Image (EI) также поддерживает фильтрацию трафика с помощью аппаратной реализации параметров управления доступом (ACP) на 2, 3 и 4 уровнях, списки доступа, основанные на времени или на значении DSCP.
  • Развитые средства качества обслуживания (QoS): серия Catalyst 2950 EI поддерживает классификацию трафика по полям DSCP или 802.1p (CoS), а также по исходным и конечным MAC, IP адресам или портам TCP/UDP, полисинг и маркирование входящих пакетов, приоритетную очередность и очередность WRR для исходящих пакетов, функциональность AutoQoS.
  • Высокая доступность: поддержка резервной системы питания Cisco Redundant Power System 300 (RPS 300) или 675 (RPS 675), функциональность IGMP snoopingPer-VLAN Spanning Tree PlusMulticast VLAN Registration (MVR), дополнительная функциональность Spanning-Tree: PortFast, UplinkFast, BackboneFast.
  • Отличная управляемость: внедренное в коммутатор ПО Cisco CMS позволяет управлять до 16 коммутаторами с помощью стандартного web-браузера вне зависимости от их физического расположения, функциональность Cisco Express Setup, поддержка управления с помощью SNMP-платформ, таких как CiscoWorks for Switched Internetworks, поддержка SNMP и Telnet, RMON, SPAN, NTP, TFTP.


В комплект входит:
- коммутатор Cisco Catalyst WS-C2950G-48-EI б.у., тщательно протестированный, гарантия 3 месяца
- кабель питания
- упаковка
Коммутатор Cisco Catalyst WS-C2950G-48-EI
Артикул: WS-C2950G-48-EI
товар в корзине, оформить?
1 411.86 $ 93 849,86 P
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