Linksys Router SLM248G4S User Manual

Cost-effective, secure switching with  
simplified management for your  
growing business  
Growing businesses require cost-effective, networking solutions that can scale with ever-  
changing business needs. The Linksys SLM248G4S Smart Switch with Resilient Clustering  
technology brings a whole new level of intelligence and security to the network infrastructure  
at a cost-effective price. It offers 48 10/100 Ethernet (copper) ports with four 10/100/1000  
Gigabit Ethernet copper or optional optical (SFP) interfaces for uplinking 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 SLM248G4S is able to secure the network through  
802.1X port authentication and MAC Filtering. 802.1X requires clients to authenticate themselves  
before they are given access to the network.  
The SLM248G4S switches provide Resilient Clustering technology which 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 4 units of the SLM248G4S (or up to 192 ports when  
combined with SLM224G4S) to be set up in a switch cluster. SLM248G4S units can coexist in a switch  
cluster with other Linksys Smart Switches that support Resilient Clustering technology—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 SLM248G4S’s extensive QoS features make the solution ideal for real-time  
applications like Voice and Video. The four priority queues together with Weighted Round Robin 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 (TOS or DSCP).  
Intelligent Broadcast, Multicast, and Unknown Unicast storm control minimizes and contains the effects  
that these types of storms have on regular traffic. 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 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 a level of reliability because the system will continue to operate if one of the links breaks. Spanning  
Tree (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, secure management platform enabling administrators to  
better utilize the extensive feature set of the switch, resulting in a better optimized, more secure network.  
PRODUCT DATA  
BUSINESS SERIES  
Easy-to-use Web  
browser interface makes  
installation quick and  
effortless  
Grow your network with  
options like Resilient  
Clustering and Link  
Aggregation  
802.1X port authentication  
and MAC address filtering  
brings network security down networked applications, including  
to the switch port level voice, video and data storage  
Advanced QoS enables the  
network to be optimized for your  
48-Port 10/100 + 4-Port Gigabit  
Smart Switch with Resilient  
Clustering Technology  
Model: SLM248G4S  
 
Features (continued)  
Layer 2  
VLAN  
Port-based and 802.1q-based VLANs  
Management VLAN  
Head of Line Blocking Prevention  
Supports Frame size up to 10Kbytes  
Enhanced QoS functions  
including rate limiting for  
ingress/egress and per flow  
at 64kbps granularity  
HOL Blocking  
Jumbo Frame  
HTTP interface  
Standards  
User/Network security  
via 802.1x (with Radius  
authentication) and MAC-  
based filtering  
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  
Containment of storms—  
Broadcast and Multicast  
Environmental  
Dimensions (W x H x D)  
Weight  
Expandability and  
17.32" x 1.75" x 13.81" (440 x 44.45 x 350.8 mm)  
8.77 lb (3.98 kg)  
100-240V 0.5A  
availability increased across  
multiple switches using Link  
Aggregation  
Power  
Certification  
FCC Part 15 Class A, CE Class A, UL CSA (CSA22.2), CE mark, CB  
32 to 104°F (0 to 40°C)  
-4 to 158°F (-20 to 70°C)  
20 to 95%, Noncondensing  
5 to 90%, Noncondensing  
Port Trunking for up to 8  
groups with up to 8 ports  
per group allows you to  
increase your bandwidth  
for each uplink or Server  
connection  
Operating Temp.  
Storage Temp.  
Operating Humidity  
Storage Humidity  
Package Contents  
SNMP and RMON  
management expand your  
visibility options  
• One SLM248G4S Switch  
• One AC Power Cord  
• One Rack Mounting Kit with Brackets and Hardware  
• One CD with User Guide in PDF Format  
• One Online Registration Card  
• Console Cable  
Minimum Requirements  
• Web-based Utility: Web Browser—Microsoft Internet Explorer (version 5.5 or above)  
• Cat5 Ethernet Network Cable  
Linksys  
A Division of Cisco Systems, Inc.  
121 Theory  
Irvine, CA 92617 USA  
E-mail:  
Web:  
Linksys products are available in more  
than 50 countries, supported by  
12 Linksys Regional Offices throughout  
the world. For a complete list of local  
Linksys Sales and Technical Support  
contacts, visit our worldwide website  
PRODUCT DATA  
BUSINESS SERIES  
Check the product package and contents for specific features supported. Specifications are subject to change without notice.  
Linksys is a registered trademark or trademark of Cisco Systems, Inc. and/or its affiliates in the U.S. and certain other countries.  
Copyright © 2007 Cisco Systems, Inc. All rights reserved. Other brands and product names are trademarks or registered trademarks of their  
respective holders.  
7110210B-AI  
 
Model: SLM248G4S  

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