Cisco SLM248P User manual

Data Sheet
© 2008 Cisco Systems, Inc. All rights reserved. This document is Cisco Public Information. Page 1 of 5
Cisco SLM248P 48-Port 10/100 + 2-Port Gigabit Smart
Switch: SFPs/PoE
Cisco Small Business Smart Switches
Cost-Effective, Secure Switching with Simplified Management and PoE for Your Growing
Business
Highlights
●Connects up to 48 devices - PCs, printers, wireless access points, and servers - to share
and transfer files and videos across your network
●Power over Ethernet easily and cost-effectively powers wireless access points, video
cameras, and other network-connected endpoints
●Strong security protects network traffic to keep unauthorized users off the network
●Basic QoS helps ensure a consistent network experience and supports networked
applications including voice, video, and data storage
●Easy-to-use Web browser interface makes installation quick and effortless
Figure 1. Cisco SLM248P 48-Port 10/100 + 2-Port Gigabit Smart Switch: SFPs/PoE
Product Overview
The Cisco®Small Business Smart Switches are cost-effective switching solutions that are ideal for
small businesses, the network edge, or workgroups within larger organizations. These easy-to-
install, high-speed switches offer many of the same quality of service (QoS) and security features
found in more expensive full Layer 2 managed switches, but without their complexity. The Cisco
SLM248P 48-Port 10/100 + 2-Port Gigabit Smart Switch (Figure 1) offers forty-eight 10/100 copper
ports with two shared Gigabit copper or optical Small Form-Factor Pluggable (SFP) uplink
interfaces for connecting the switch to the core network. The simplified user interface is an intuitive
management tool, enabling you to quickly utilize the comprehensive feature set of the switch for a
better-optimized network.
The Cisco SLM248P includes numerous QoS features to help ensure that traffic is prioritized
properly to deliver the best possible user experience for real-time applications such as voice and
video or bandwidth-intensive graphic/video file uploads or downloads. With its Internet Group
Management Protocol (IGMP) snooping feature, the switch limits IP multicast traffic (such as real-
time presentations, video conferences, and online gaming) to only the ports that have requested it,
enabling the rest of the network to operate at peak efficiency. Additional QoS capabilities such as
IEEE 802.1p priority tagging, differentiated services code point (DSCP), and four hardware queues

Data Sheet
© 2008 Cisco Systems, Inc. All rights reserved. This document is Cisco Public Information. Page 2 of 5
also maintain quality for real-time applications like voice and video. Network traffic can be
optimized with the switch’s 802.1Q VLAN support, which enables you to quickly segregate network
traffic by department or workgroup. VLANs also provide an additional layer of security by keeping
sensitive data separated from other workgroups on the network.
For wireless or voice over IP (VoIP) deployments, the Cisco SLM248P supports the IEEE 802.3af
standard for Power over Ethernet (PoE). This eliminates the need for additional power cables or a
nearby power outlet, thereby making installation simple and inexpensive and allowing networking
devices like cameras and wireless access points to be positioned in optimal locations such as
ceilings and walls - even outdoors.
Network security is an absolute requirement for any business, and preventing unauthorized access
to the company network is critical. The Cisco SLM248P secures the network through 802.1X port
authentication, which prompts end users to provide their username and password before they are
permitted to pass data. User access can also be controlled through the switch’s MAC-based
filtering capability, which allows network access only to those devices or workstations that have
been authorized as identified by their MAC address. The many-to-one or one-to-one port mirroring
feature of the Cisco SLM248P enables you to monitor the type of traffic being transmitted on the
network.
The Cisco SLM248P includes features for quickly expanding your network. To substantially
increase network throughput speeds, especially useful for companies whose employees are
routinely backing up their hard drives to a company server or storage platform, the Cisco SLM248P
supports link aggregation, which allows multiple high-bandwidth trunks between switches to be set
up. Link aggregation also provides a level of availability and redundancy, as traffic will continue to
flow even if one of the network links breaks. The switch’s Spanning Tree Protocol (STP) support
and storm control features help to control planned or inadvertent cable loops when switches are
connected to one another. These loops can cause broadcast or multicast storms in the network
that severely limit its performance. With these features, you can confidently build a mesh of
switches and quickly expand your network to support your growing workforce.
Features
●Forty eight 10/100 switched RJ-45 ports deliver up to 200 Mbps of throughput per port
●Two 10/100/1000 switched RJ-45 Gigabit uplink ports with two shared SFP ports (combo
ports)
●PoE on twenty-four 10/100 ports (ports 1 through 12 and 25 through 36), compatible with
IEEE 802.3af, with 180W dedicated internal power, enough to support 7.5W for 24 PoE
ports or 15.4W on 11 ports
●13.6-Gbps nonblocking, store-and-forward switching mechanism
●Simplified QoS management enabled by advanced queuing techniques using 802.1p,
IPv4/v6 Differentiated Services (DiffServ)/DSCP traffic prioritization specifications
●Configuration and monitoring from a standard web browser with a simplified management
interface
●802.1Q-based VLANs enable segmentation of networks for improved performance and
security
●Port-level security via 802.1X authentication and MAC-based filtering

Data Sheet
© 2008 Cisco Systems, Inc. All rights reserved. This document is Cisco Public Information. Page 3 of 5
●Increased bandwidth (up to 8x) and added link redundancy with Link Aggregation Control
Protocol (LACP)
●Multicast and broadcast storm control
●Port mirroring for noninvasive monitoring of switch traffic
●Fully rack-mountable using the included rack-mounting hardware
Specifications
Table 1 shows the specifications, package contents, and minimum requirements for the Cisco
SLM248P 48-Port 10/100 + 2-Port Gigabit Smart Switch.
Table 1. Specifications for the Cisco SLM248P 48-Port 10/100 + 2-Port Gigabit Smart Switch: SFPs/PoE
Specifications
Ports ●48 RJ-45 connectors for 10BASE-T/100BASE-TX, 2 combo ports with RJ-45
connectors for 10BASE-T/100BASE-TX/1000BASE-T, and mini Gigabit Interface
Converter (mini-GBIC)/SFP slots
●Auto medium dependent interface (MDI) and MDI crossover (MDI-X)
●Auto-negotiate/manual setting
Buttons Reset
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 System, 10/100 Link/Act and PoE or Speed, Gigabit Link/Act and Speed
PoE
●IEEE 802.3af compatible
●PoE can be dynamically allocated to the PoE ports according to the powered device’s power demand and power priority
setting.
Performance
Switching capacity 13.6 Gbps nonblocking
Forwarding rate 10.12 mpps wire-speed performance
Layer 2
MAC table size 8000
Number of VLANs 128 active VLANs (4096 range)
VLAN ●Port-based and 802.1Q tag-based VLANs
●Management VLAN
Head-of-line (HOL) blocking HOL blocking prevention
Management
Web user interface Built-in web user interface for easybrowser-based configuration (HTTP)
Firmware upgrade Web browser upgrade (HTTP) and Trivial File Transfer Protocol (TFTP)
Port mirroring Traffic on a port can be mirrored to another port for analysis with a network analyzer
Other management ●Port mirroring
●DHCP/BOOTP client
●System log
●Configuration upload and backup via HTTP or TFTP
Security
●802.1X - RADIUS authentication; MD5 encryption
●Port security - MAC-based filtering
●Management access control
Availability
Link aggregation ●Link aggregation using IEEE 802.3ad LACP
●Up to 4 groups with up to 8 ports per group
Storm control Broadcast and multicast

Data Sheet
© 2008 Cisco Systems, Inc. All rights reserved. This document is Cisco Public Information. Page 4 of 5
Spanning Tree IEEE 802.1D Spanning Tree and PortFast
IGMP snooping IGMP (v1/v2) snooping provides for fast client joins and leaves of multicast streams and
limits bandwidth-intensive video traffic to only the requestors. Supports 32 multicast groups.
QoS
Priority levels 4 hardware queues
Scheduling Priority queuing and weighted round-robin (WRR)
Class of service ●Port based
●802.1p VLAN priority based
●IPv4/v6 IP DSCP based
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
●802.3 ad LACP
●802.3af PoE
●802.1D STP
●802.1Q/p VLAN
●802.1X port access authentication
Environmental
Dimensions
W x H x D 17.32 x 1.70 x 13.58 in. (440 x 43.2 x 345 mm)
Weight 10.14 lb (4.6 kg)
Power Internal power, 100-240V
Certification FCC Part 15 Class A, CE Class A, UL, cUL, CE mark, CB
Operating temperature 32°to 122°F (0°to 50°C)
Storage temperature 32°to 158°F (0°to 70°C)
Operating humidity 10% to 90%, noncondensing
Storage humidity 10% to 90%, noncondensing
Package Contents
●Cisco SLM248P 48-Port 10/100 + 2-Port 10/100/1000 Gigabit Smart Switch with 2 combo SFPs and PoE
●AC power cord
●Rack mounting kits with bracket and hardware
●CD with user guide in PDF format
●Online registration card
Minimum Requirements
●Web-based utility: Microsoft Internet Explorer (version 5.5 or later)
●Category 5 Ethernet network cable
Product Warranty
5-year limited hardware warranty with return to factory replacement and 90-day limited software warranty
Cisco Limited Warranty for Cisco Small Business Series Products
This Cisco Small Business product comes with a 5-year limited hardware warranty with return to
factory replacement and a 90-day limited software warranty. In addition, Cisco offers software
application updates for bug fixes and telephone technical support at no charge for the first 12
months following the date of purchase. To download software updates, go to:
http://www.cisco.com/go/smallbiz.
Product warranty terms and other information applicable to Cisco products are available at
http://www.cisco.com/go/warranty.

Data Sheet
© 2008 Cisco Systems, Inc. All rights reserved. This document is Cisco Public Information. Page 5 of 5
For More Information
For more information on Cisco Small Business products and solutions, visit:
http://www.cisco.com/smallbusiness.
Printed in USA C78-501235-00 11/08