Linksyscisco Slm248g4s 48-port 10/100 + 4-port Gigabit Smart (Usado)

Descripción

Cisco SLM248G4S 48-Port 10/100 + 4-Port Gigabit Smart
Switch: RCT
Cisco Small Business Smart Switches
Highly Secure, Easy-to-Use Switches for Small Businesses

Product Overview
Growing businesses require cost-effective networking solutions that can scale to meet everchanging
business needs. The Cisco® SLM248G4S 48-Port 10/100 + 4-Port Gigabit Smart Switch
with Resilient Clustering technology (Figure 1) brings increased intelligence and security to the
network infrastructure at a cost-effective price. It offers forty-eight 10/100 Ethernet (copper) ports
with four 10/100/1000 Gigabit Ethernet copper or optional optical Small Form-Factor Pluggable
(SFP) interfaces for connecting the switch to the core network.
Network security is a top priority in any size business; unauthorized access to the network and
mission-critical data is a constant concern. The Cisco SLM248G4S helps secure the network
through 802.1X port authentication and MAC filtering. The 802.1X standard requires clients to
authenticate themselves before they are given access to the network.
Resilient Clustering technology enables several switches to be clustered together and managed as
a single switch with one web management interface and one IP address. This technology allows
up to four of the Cisco SLM248G4S switches (for up to 192 ports when combined with the Cisco
SLM224G4S) to be set up in a switch cluster. Cisco SLM248G4S units can coexist in a switch
cluster with other Cisco Small Business Smart Switches that support Resilient Clustering
technology - the Cisco SLM224G4PS, SLM224G4S, and SLM248G4PS.
Businesses are recognizing the benefits of voice over IP (VoIP) technology and are quickly
migrating their voice services to IP-based platforms, requiring their local area networks to support
both voice and data applications. The extensive quality of service (QoS) features of the Cisco
SLM248G4S make the solution ideal for real-time applications such as voice and video. The four
priority queues, together with weighted round-robin (WRR) and strict priority scheduling
techniques, let network administrators quickly prioritize real-time voice and video traffic over data
traffic. Individual users or applications can also be prioritized above others using various class of
service options - by port, Layer 2 priority (802.1p), and Layer 3 priority (type of service [ToS] or
differentiated services code point [DSCP]). Intelligent broadcast, multicast, and unknown unicast
storm control minimizes and contains the effects that these types of storms have on regular traffic.
Internet Group Management Protocol (IGMP) snooping limits bandwidth-intensive video traffic to
only the requestors without flooding to all users. Incoming traffic can be policed and outgoing
traffic can be shaped, allowing network administrators to control network access and traffic flow.
The Cisco SLM248G4S also includes features for network expansion and faster throughput
performance. Link aggregation enables network administrators to create multiple high-bandwidth
trunks between switches. This provides reliability, because the system will continue to operate ifone of the links breaks. Spanning Tree Protocol (STP) allows administrators to avoid network loops and to build a mesh of switches to increase the availability of their network.
The simplified user interface provides an intuitive, highly secure management platform, enabling administrators to better utilize the extensive feature set of the switch, for a better-optimized, more secure network.

Features
¿ Forty-eight 10/100 switched RJ-45 ports deliver up to 9.6 Gbps of throughput
¿ Two shared 10/100/1000 mini Gigabit Interface Converter (mini-GBIC) ports
¿ Switching capacity delivers wire-speed performance at 17.6 Gbps nonblocking capacity
¿ WebView monitoring allows administrators to view the current status and configuration
using their favorite web browser
¿ Automatic medium dependent interface (MDI) and MDI crossover (MDI-X) cable detection
¿ Port-based and 802.1Q-based VLANs support up to 128 VLANs
¿ Port configuration settings for link, speed, auto MDI/MDI-X, flow control, and more
¿ Fully rack mountable using the included rack-mounting hardware
¿ MAC address table supports up to 8000 entries
¿ Optimal platform to support real-time applications, such as voice and video, by providing
features like IGMP snooping, multiple queues (four) with appropriate scheduling
techniques, prioritization of traffic based on port, 802.1p, IP ToS/precedence/DSCP, and
line rate forwarding mechanisms
¿ Enhanced QoS functions, including rate limiting for ingress/egress and per flow at 64 kbps
granularity
¿ http interface
¿ User/network security via 802.1X (with RADIUS authentication) and MAC-based filtering
¿ Containment of storms - broadcast and multicast
¿ Expandability and availability increased across multiple switches using link aggregation
¿ Port trunking for up to eight groups with up to eight ports per group allows you to increase
your bandwidth for each uplink or server connection
¿ Simple Network Management Protocol (SNMP) and Remote Monitoring (RMON)
management expand your visibility options

Specifications
Table 1 contains the specifications, package contents, and minimum requirements for the Cisco
SLM248G4S 48-Port 10/100 + 4-Port Gigabit Smart Switch.
Table 1. Specifications for the Cisco SLM248G4S 48-Port 10/100 + 4-Port Gigabit Smart Switch: RCT
Specifications
Ports 48 RJ-45 connectors for 10BASE-T/100BASE-TX, 4 RJ-45 connectors for 10BASET/
100BASE-TX/1000BASE-T with 2 shared SFP slots and 2 Gigabit ports
Buttons None
Cabling type Unshielded twisted pair (UTP) Category 5 or better for 10BASE-T/100BASE-TX, UTP
Category 5 Ethernet or better for 1000BASE-T
LEDs Power, Link/Act, Speed

Performance
Switching capacity 17.6 Gbps, nonblocking
MAC table size 8000
Number of VLANs 128
Switch Clustering

Switch cluster operation

¿ Maximum switch cluster size: 192 ports
¿ Maximum number of units in switch cluster: 4
¿ Hot insertion and removal
¿ Ring and chain options
¿ Master and backup master for resilient cluster control
¿ Auto-numbering or manual configuration of units in switch cluster

Management
Web user interface Built-in web user interface for easy browser-based configuration (http)
SNMP SNMP versions 1, 2c, and 3
SNMP MIBs RFC1213 MIB-2, RFC2863 interface MIB, RFC2665 Ether-like MIB, RFC1493 bridge MIB,
RFC2674 extended bridge MIB (P-bridge, Q-bridge), RFC2819 RMON MIB (groups 1, 2, 3,
and 9 only), RFC2737 entity MIB, RFC 2618 RADIUS client MIB
RMON Embedded RMON software agent supports 4 RMON groups (history, statistics, alarms, and
events) for enhanced traffic management, monitoring, and analysis
Firmware upgrade Web browser upgrade (http)
Trivial File Transfer Protocol (TFTP) upgrade
Port mirroring Traffic on a port can be mirrored to another port for analysis with a network analyzer or
RMON probe

Other management ¿ Switch audit log
¿ Dynamic Host Configuration Protocol (DHCP) client
¿ BOOTP
¿ Simple Network Time Protocol (SNTP)
¿ Xmodem upgrade
¿ Cable diagnostics
¿ Port mirroring
¿ Ping

Security Features

IEEE 802.1X 802.1X authentication: RADIUS; Extensible Authentication Protocol - Tunneled Transport
Layer Security (EAP-TTLS), Protected EAP (PEAP), EAP-MD5, Cisco LEAP, EAP-TLS
Access control ToS/DSCP
Availability
Link aggregation ¿ Link aggregation using IEEE 802.3ad Link Aggregation Control Protocol (LACP)
¿ Up to 8 ports in up to 8 trunks
Storm control Broadcast and multicast
Spanning Tree IEEE 802.1d Spanning Tree, Fast Linkover
IGMP snooping IGMP (versions 1 and 2) snooping provides for fast client joins and leaves of multicast
streams and limits bandwidth-intensive video traffic to only the requestors
QoS
Priority levels 4 hardware queues
Scheduling Priority queuing and WRR
Class of service ¿ Port based
¿ 802.1p VLAN priority based
¿ IPv4 IP precedence/ToS/DSCP
Layer 2
VLAN ¿ Port-based and 802.1Q-based VLANs
¿ Management VLAN
Head-of-line (HOL) blocking HOL blocking prevention
Jumbo frame Supports frame size up to 10 KB
Standards
¿ 802.3 10BASE-T Ethernet
¿ 802.3u 100BASE-TX Fast Ethernet
¿ 802.3ab 1000BASE-T Gigabit Ethernet
¿ 802.3z Gigabit Ethernet
¿ 802.3x flow control Environmental

Dimensions
W x H x D
17.32 x 1.75 x 13.81 in.
(440 x 44.45 x 350.8 mm)
Weight 8.77 lb (3.98 kg)
Power 100-240V 0.5A
Certification FCC Part 15 Class A, CE Class A, UL CSA (CSA22.2), CE mark, CB
Operating temperature 32° to 104°F (0° to 40°C)
Storage temperature -4° to 158°F (-20° to 70°C)
Operating humidity 20% to 95%, noncondensing
Storage humidity 5% to 90%, noncondensing

Package Contents
¿ Cisco SLM248G4S 48-Port 10/100 + 4-Port Gigabit Smart Switch
¿ AC power cord
¿ Rack-mounting kit with brackets and hardware NOT INCLUDED
¿ CD with user guide in PDF format
¿ CONSOLE CABLE NOT INCLUDED
Minimum Requirements
¿ Web-based utility: Microsoft Internet Explorer (version 5.5 or later)
¿ Category 5 Ethernet network cable

Garantía del vendedor: 30 días