3Com 3CRS48G-24-91 User manual

SW TCH NG
DATA HEET
The 3Com®Switch 4800G Gigabit Family delivers
outstanding security, reliability and multi-service
support capabilities for robust switching at the edge
or aggregation layer of large enterprise and campus
networks, or in the core layer of medium- and small-
sized enterprise networks. The family is comprised of
Layer 2/3/4 Gigabit Ethernet switches that can
accommodate the most demanding applications,
providing resilient and secure connectivity and the
latest traffic-prioritization technologies to optimize
applications on converged networks.
Designed for maximum flexibility, these switches are
available with 24 or 48 Gigabit ports. Power over
Ethernet (PoE) and non-PoE models are offered, with
optional 10-Gigabit expansion capability and SFP
mini-GB C Gigabit combo ports for fiber flexibility. The
all-SFP model with dual power supplies, for highest
availability applications, allows for very flexible fiber
with copper Gigabit connectivity.
Multiple Switch 4800G units can be stacked together,
up to nine units high, using patented 3Com
eXpandable Resilient Networking (XRN®) technology.
With XRN, it is easy to build fully redundant networks,
with aggregated ports spread across multiple units,
with all units presenting themselves with a single
simplified management interface.
Each of the five 3Com Switch 4800G models comes in
a convenient, stackable 1U-high enclosure:
Switch 4800G 24-Port. 24 10/100/1000 Mbps ports
with two dual-port 10-Gigabit slots; includes four SFP
Gigabit combo ports
Switch 4800G 48-Port. 48 10/100/1000 Mbps ports
with two dual-port 10-Gigabit slots; includes four SFP
Gigabit combo ports
Switch 4800G PWR 24-Port. 24 10/100/1000 Mbps
PoE ports with two dual-port 10-Gigabit slots;
includes four SFP Gigabit combo ports
Switch 4800G PWR 48-Port. 48 10/100/1000 Mbps
PoE ports with two dual-port 10-Gigabit slots;
includes four SFP Gigabit combo ports
Switch 4800G 24-Port SFP. 24 SFP Gigabit ports with
two dual-port 10-Gigabit slots and dual removable
power supplies, with up to two power-cord inputs;
includes eight 10/100/1000 Mbps combo ports
3COM SWITCH 4800G
GIGABIT FAMILY
SW TCH NG
DATA HEET
Shown above from top: 3Com Switch 4800G 24-Port, Switch
4800G 48-Port, Switch 4800G 24-Port SFP, Switch 4800G PWR
24-Port, Switch 4800G PWR 48-Port
OVERVIEW

KEY BENEFIT
High Expandability for Investment Protection
All models in the 3Com Switch 4800G Gigabit Family
include auto-sensing 10-, 100- and 1000-Mbps
connections, giving you the ability to gradually upgrade
your edge connections to higher bandwidth while
retaining full compatibility with slower desktops. Support
for dual-speed SFPs facilitates connections to both 100
and 1000 MB fiber cabling, making network migration
easier.
Two expansion slots, each supporting available 1- or 2-
port 10-Gigabit and local connection modules, provide
interfaces for high bandwidth unit-to-unit local
connections and 10-Gigabit uplinks, helping you to
protect your network investment.
Every Switch 4800G model has the ability to pass and
route Pv4 and Pv6 data. As an Pv4/ Pv6 dual-stack
platform, the switches are Pv4- and Pv6–ready,
supporting the major L3 routing protocols, multicast
protocols and policy routing mechanisms and ensuring a
seamless migration from Pv4 to Pv6.
Premium ecurity
Multiple layers of security are built into each Switch
4800G. Management access can be limited to known
stations and unauthorized access can be prevented by
encrypting management traffic with SSH for CL access,
SSL/HTTPS for web access and SNMPv3 for SNMP
management access.
Advanced processor queuing mechanisms help prevent
Denial of Service (DOS) attacks while DHCP snooping
ensures that devices can only receive an P address from
a legitimate DHCP server on the network. Enhanced
Access Control Lists (ACLs) restrict users to certain
areas of your network. Unicast Reverse Path Finding
(uRPF) technology verifies the authenticity of a route from
the receiving interface to the source address, deleting the
data packet if the route does not exist and preventing
malicious network attacks that are based on source
address spoofing.
Advanced network access control features, including
EEE 802.1X and MAC-based network login, help ensure
that only authorized users get access to the network.
Multilayer Reliability
3Com 4800G switches interoperate with a number of link
reliability technologies including Rapid Ring Protection
Protocol (RRPP), a fast ring protection mechanism
created by 3Com. f a link or node on the Ethernet ring
fails, RRPP rapidly moves traffic to a backup link,
ensuring normal operations without impacting network
convergence time. Other network resiliency features
include Spanning Tree, Rapid Spanning Tree and Multiple
Spanning Tree protocol support.
Hardware resiliency, delivered with available redundant
power system support, allows for the continued operation
of the switch in the event of a power supply failure, and
supplements power for full PoE operation across all
ports. For high-availability fiber connections, the Switch
4800G 24-Port SFP comes with dual 1+1 redundant power
supplies with dual power inputs. All switches in this
family include fault detection and alarms, power supply
and fan monitoring, and remote management.
Convergence-Ready upport
Built-in PoE enables certain models of the Switch 4800G
to power network-attached equipment, significantly
reducing costs associated with terminal equipment
cabling and management. ndustry-standard EEE
802.3af Power over Ethernet speeds deployment of Vo P,
wireless access points and network-attached video
surveillance camera systems.
The voice VLAN technology embedded in this family
ensures the highest level of security and performance by
placing voice traffic on a virtual voice network. By
identifying voice streams at their ports and adding
corresponding access ports to voice VLANs, the switches
provide dedicated channels for voice traffic. Priority rules
are then issued to ensure that voice streams are
transmitted before data or video streams and
conversation quality is optimal.
Unparalleled Quality of ervice
The 3Com Switch 4800G offers L2–L4 packet filtering and
delivers flow classification based on source P and MAC
addresses, destination P and MAC addresses, ports,
protocols or VLANs. The switches also offer flexible
queue scheduling algorithms that support settings based
on ports and queues and include three scheduling
modes: Strict Priority (SP), Weighted Round Robin (WRR)
and SP+WRR. Committed Access Rate (CAR) provides
minimum granularity of 64 kbps. Outbound and inbound
port mirroring monitors and duplicates data packets for
network detection and troubleshooting.
23COM WITCH 4800G GIGABIT FAMILY

33COM WITCH 4800G GIGABIT FAMILY
Powerful, Integrated Management Capabilities
The Switch 4800G supports Simple Network
Management Protocol (SNMP) versions 1/2c/3 and open
network management platforms such as OpenView and
the QuidView Network Management System (NMS).
For additional convenience, the switches may also be
managed via Command Line nterface (CL ), Web network
management, TELNET and Huawei Group Management
Protocol (HGMP) cluster (stacking) management.
Encryption modes such as SSH2.0, SNMPv3 and HTTPS
are embedded in the switch, ensuring that management
traffic is highly secure.
MAC-and protocol-based VLANs, combined with ACL
policies in the global or VLAN mode, minimize hardware
resources and simplify configuration. nbound and
outbound packets are randomly sampled and collected
according to a set ratio with the sFlow function. LLDP
and LLDP-MED are supported for standards-based
neighbor discovery.
Redundant Power ystem upport
Four 3Com Switch 4800G models support a redundant
power system (RPS) connection.
RPS units provide these benefits:
›For PWR switches, an RPS can deliver more power
budget for EEE 802.3af Power over Ethernet than what
the switches alone can provide.
›They deliver redundant power to switches so there is
continued operation should the switch unit power supply
fail. This allows for continuous operation of advanced
Enterprise networks, particularly important for con-
verged networks running P phones on the network.
3Com H3C RPS Systems
3Com switches are compatible with 3Com H3C®RPS
solutions. These are enterprise-class power redundancy
systems that work with many 3Com fixed-configuration
switches. 3Com Corporation manufactures networking
equipment under the H3C brand for sale into many
markets.
These H3C RPS models are used with the Switch 4800G:
›the H3C RPS 1000 is 1U high and provides multiple
power output connections to support multiple switch
units at the same time. Two power rectifiers can be
installed for 1+1 load sharing and power redundancy. t
supports switches with -54V RPS connections, and
delivers sufficient power to fully provision all PoE ports
of a switch with full power redundancy.
›the RPS 800 provides selective DC outputs of +12V and
-54V. This is a fixed-configuration 1U high unit with a
single power rectifier and a single power connection.
Sufficient redundant power is available for provisioning
a single Switch 4800G 48- or 24-port non-PoE unit.
›the RPS 500 provides selective DC outputs of +12V and
-54V. This is a fixed-configuration 1U high unit with a
single power rectifier and a single power connection.
Sufficient redundant power is available for provisioning
a single Switch 4800G 24-port non-PoE unit.
KEY BENEFIT (continued)
FEATURE HIGHLIGHT
Provides up to 450 Gigabit ports in a stack nine units high, managed as a single- P entity
Equipped with four dual-purpose ports providing either 10/100/1000 or SFP Fast/Gigabit Ethernet connectivity
Full Pv4/ Pv6 networking support
Offers optional 2-port 10-Gigabit (XFP or SFP+), 2-port local connection, or 2-port Fast Ethernet (SFP) modules
Delivers wirespeed and line-rate performance on all ports
Offers OSPF and multicast routing, 3Com XRN stacking technology and EEE 802.3af Power over Ethernet
Provides high resiliency and continuous availability with active load sharing and support for ultra-fast failover recovery
mplements multilayer distributed security including ACLs, DES 56/168-bit†encryption, EEE 802.1X network login
and RADA authentication
Prioritizes converged network traffic to ensure high levels of service for latency-sensitive applications
Supports advanced enterprise switching technology: Border Gateway Protocol (BGP), VLAN VPN (Q-in-Q) and others
Leverages existing infrastructure power schemes with built-in support for both AC and DC power
Consolidates administrative control and enhances core-to-edge visibility with the latest Comware V5 OS
Offers an SFP-based model with 24 SFP Gigabit ports, eight of which are dual-purpose
Backed by top-flight service, support and training from 3Com and 3Com authorized partners
†168-bit encryption not available in all countries. Refer to www.3com.com for details.

43COM WITCH 4800G GIGABIT FAMILY
3Com Global Services offers the resources and talents
of a major corporation plus more than two decades of
experience in resolving network challenges and
delivering business benefits to enterprises around
the world.
Global support with a personalized focus in the local
language helps drive productivity and minimize
expenses. Because 3Com understands both the
technology and the business, we’re the partner you
need to maintain your competitive edge and remain
strong.
Additional Service, Support and Training Offerings
Network Health Check
An activity-auditing service focused on improving network
performance and productivity
ncludes traffic monitoring, utilization analysis, problem
identification, and asset deployment recommendations
Extensive report provides blueprint for action
Network Installation and Implementation Services
Experts set-up and configure equipment and integrate
technologies to maximize functionality and minimize business
disruption
For large and complex sites, implementation services include
personalized configuration, project management, extended
testing and coaching on network administration
Project Management
Provides extra focus and resources that special projects
demand
3Com engineers manage entire process from initial
specifications to post-project review
Using structured methodology, requirements are identified,
projects planned and progress of implementation activities
tracked
3Com GuardianSM Maintenance Service
This service provides comprehensive on-site support and
includes advance hardware replacement, expedited telephone
technical support and software upgrades
3Com ExpressSM Maintenance Service
This service provides speedy access to 3Com shipment of
advance hardware replacements (including a four-hour
option), expedited telephone technical support and software
upgrades
3Com University
Self-paced and instructor-led technology and product
courses, plus certification programs
For additional information, please visit
www.3com.com/services
Warranty 3Com Limited Lifetime Warranty. For as long as the original end user owns the product,
or for five years after 3Com discontinues the of sale of the product, whichever occurs first.
Hardware coverage Covers the complete unit including power supply and fan.
n-warranty hardware replacement* Advanced Hardware Replacement of hardware for the duration of the warranty. n the US
48 contiguous states this is same-day ship with next business day delivery when call
received before noon Pacific time. For Canada, Alaska and Hawaii, this is same-day ship
when call received before noon Pacific time. For the rest of the world, it is next-business-
day ship. Actual delivery times may vary depending on customer location. Reasonable
commercial efforts apply.
Software coverage 90 days for media replacement.
Software updates* Access to releases with incremental software features and bug fixes. For the Switch 4800G,
updates are all releases within the licensed 3Com OS software level.
Online Knowledgebase support* Access to online troubleshooting tool for the duration of the warranty.
* These services are not included as part of the Warranty and 3Com reserves the right to modify or cancel this offering at any time, without advance notice.
This offering is not available where prohibited by law. Services are effective at warranty start date, and are enabled with product registration. Customers
receive a user D with eSupport registration.
PRODUCT WARRANTY AND OTHER ERVICE
ERVICE AND UPPORT

CONNECTIVIT
witch 4800G 24-Port
24 10/100/1000 Mbps with 4 SFP combo interfaces
witch 4800G PWR 24-Port
24 10/100/1000 Mbps with 4 SFP combo interfaces
10/100/1000 ports with 15.4W per port maximum; 370W total PoE power
budget without supplemental RPS power
witch 4800G 48-Port
48 10/100/1000 Mbps with 4 SFP combo interfaces
witch 4800G PWR 48-Port
48 10/100/1000 Mbps with 4 SFP combo interfaces
10/100/1000 ports with 15.4W per port maximum; 370W total PoE power
budget without supplemental RPS power
witch 4800G 24-Port FP
24 100/1000 Mbps SFP with 8 10/100/1000 Mbps combo interfaces
All models
2 expansion slots each supporting up to 2 10-Gigabit interfaces
10BASE-T/100BASE-TX/1000BASE-T ports configured as auto-MD /MD X
PERFORMANCE
24-port models
144 Gbps full duplex switching capacity
107.2 Mpps forwarding rate
48-port models
192 Gbps full duplex switching capacity
142.9 Mpps forwarding rate
tacking Performance
With CX4 local connection, each port operates at 12 Gbps, or 24 Gbps full
duplex. Total bandwidth is 48 Gbps using two ports per switch, or 96 Gbps
using four ports per switch.
All models
Wirespeed performance across ports
Store-and-forward switching
Latency <10 
LA ER 2 SWITCHING
32K MAC addresses in address table
1K static configurable unicast MAC addresses (in addition to default addresses)
Jumbo frame support
4,094 port-based EEE 802.1Q VLANs
GARP VLAN Registration Protocol (GVRP)
EEE 802.1 Q-in-Q double-tagged VLANs
EEE 802.1v protocol-based VLANs
MAC-based VLANs using RADA auto-VLAN assignment
VLAN mapping (1:1, n:1, 2:2)
EEE 802.1ag Service Layer Operations, Administration and Maintenance
(OAM)
EEE 802.3ad Link Aggregation Control Protocol (LACP); manual
and static modes
Link aggregation:
• 24-port models: 14 groups; 48-port models: 26 groups
• 128 total link aggregation groups per XRN/ RF stack
• 8 10/100/1000 ports or 4 10-Gigabit ports per group
Link aggregation load sharing
Auto-negotiation and manual configuration of port speed and duplex
EEE 802.3x full-duplex flow control and back pressure
Half-duplex back pressure flow control
Unidirectional Link Detection (UDLD)
Broadcast, Multicast and Unicast traffic suppression
EEE 802.1D Spanning Tree Protocol (STP)
EEE 802.1w Rapid Spanning Tree Protocol (RSTP)
EEE 802.1s Multiple Spanning Tree Protocol (MSTP), 32 instances
Bridge Protocol Data Unit (BPDU) protection
Spanning Tree root guard
nternet Group Management Protocol ( GMP) v1, 2 and 3 snooping
Filtering for 1,024 L2/L3 multicast groups
GMP querier
GMP proxy
Dynamic Host Configuration Protocol Relay (DHCP) Option 82
Unicast Reverse Path Forwarding (uRPF)
BFD for Route Protocol, VRRP
SmartLink
Virtual Routing and Forwarding (VRF)/MCE
LA ER 3 ROUTING
Hardware based Pv4 and Pv6 routing
1,024 static routes, in addition to default address
12K routing table entries
Address Resolution Protocol (ARP) entries: 8K dynamic, 1K static
1,024 virtual P interfaces
Routing nformation Protocol (R P) v1 and v2: 2K routes
Open Shortest Path First (OSPF) v1 and v2: 12K routes
Protocol ndependent Multicast-Dense Mode (P M-DM)
P M-Sparse Mode (P M-SM)
P M v4, v6
GMP v1, v2, v3
GMP proxy
Border Gateway Protocol (BGPv4); 12K routes
Multiprotocol BGP (MBGP)
Equal Cost Multipath Protocol (ECMP); up to 3 ECMP instances
Multicast Source Discovery Protocol (MSDP)
Multicast Listener Discovery (MLD) v1 and 2, and MLD snooping v1, 2 and 3
Dynamic Host Configuration Protocol Relay (DHCP Relay)
Virtual Router Redundancy Protocol (VRRP)
Rapid Ring Protection Protocol (RRPP)
Bidirectional Forwarding Detection (BFD)
Policy-based routing
Routing nformation Protocol next generation (R Png) for Pv6; 2K routes
OSPF version 3 for Pv6; 6K routes
Border Gateway Protocol 4 (BGP4) for Pv6; 6K routes
MSDP for Pv6
Manual configuration of Pv6 over Pv4 tunnels
Compatible with 6to4 tunneling and ntra-Site Automatic Tunnel
Addressing Protocol ( SATAP)
CONVERGENCE
8 hardware output queues at each port
EEE 802.1p Class of Service/Quality of Service (CoS/QoS) on ingress and
egress
Remarking of packet priority based on:
• Type of Service (ToS)
• EEE 802.1p CoS
• P precedence
• Physical port
• Source/destination MAC address ( Pv4/ Pv6)
• VLAN information
• Ethertype
• Source/destination P address
• Source/destination TCP port
• Source/destination UDP port
Packet/traffic redirection
nbound and outbound ACL policies
VLAN-based ACL policies
Time-based Access Control Lists (ACLs)
Auto-voice VLAN for automatic vendor-independent segregation and prior-
itization of Vo P traffic
Multiple voice VLANs
Auto-QoS based on RAD US settings
Weighted Round Robin (WRR) Queuing
Weighted Random Early Detection (WRED)
Weighted Fair Queuing (WFQ)
Strict Priority (SP) Queuing
Mixed mode WWR + SP Queuing
DiffServ Code Point (DSCP) priority/expedited remarking of packets
PECIFICATION
53COM WITCH 4800G GIGABIT FAMILY

63COM WITCH 4800G GIGABIT FAMILY
Forwarding (DSCP EF) remarking for prioritization of Vo P traffic
Application rate limiting, inbound and outbound; Committed Access Rate
(CAR) with granularity of 64 kbit/sec.
Restricted packet sending and receiving rates with granularity of
64 kbits/sec.
Storm suppression based on port rate percentage and pps
Port-based traffic shaping on egress
Queue-based traffic shaping on egress
Wake-on-LAN support
EEE 802.3af Power over Ethernet standards-compliant (PWR models)
SECURIT
EEE 802.1X Network login user authentication:
•Local, RAD US, or TACACS+ server authentication
• Port-based, MAC-based and trunk port authentication
• PAP, CHAP, EAP over LAN (EAPoL), EAP-TLS/TTLS, EAP-MD5 and PEAP
• Automatic port assignment of VLANs, ACLs and QoS profile based on user
• Multiple users per port
•1,024 max online users
• Guest VLAN option
•Multiple authentication server realm definitions
solate user VLANs
Centralized MAC address authentication
AAA authentication
EEE 802.1X or TACACS+ user authentication of switch management on
TELNET and console sessions
RAD US/TACACS+ session accounting
RAD US Authenticated Device Access (RADA): authenticate devices based
on MAC address against RAD US server or local database
Combined MAC and EEE 802.1X authentication on same port
Black-hole MAC addresses
DHCP Tracker
DHCP snooping, including DHCP Trust
Wirespeed packet filtering in hardware
ACLs filter at Layers 2, 3 and 4:
• Source/destination MAC address
• Ethernet type
• Source/destination P address
• Source/destination TCP port
• Source/destination UDP port
User-defined ACL filters
VLAN-based ACLs
Port-based MAC address Disconnect
Unknown Device (DUD)
ARP inspection and P source guard
ARP spoofing prevention
Unicast Reverse Path Forwarding (URPF)
MD5 cipher-text and clear-text authentication for OSPF v2 and R P v2
packets and SNMP v3 traffic
Hierarchical management and password protection for management
interface and encrypted traffic, with SNMP v3, SSL, and SSH v2
4 local user access privilege levels
Trusted management station P and/or MAC address
Encoded Archival Description (EAD)
Denial of service protection
STACKING
Use optional CX4 or XFP connections for high-bandwidth stacking of
multiple units
Resilient stacking; full duplex bandwidth of 96 Gbps when using CX4
cables and link aggregation (48 Gbps without aggregation); 40 Gbps when
using 10-Gigabit connections
Single P address and management interfaces for stack-wide control
Hot-swappable, closed-loop resilient stacking
Distributed Resilient Routing with router tables in all units; no
master/slave arrangement
Combine any Switch 4800G models into a single stack, up to 9-high, when
using XRN technology
Clustered stacking technology: single P management for up to 255 devices
from different 3Com switch families, including Switch 5500G, 5500, 4800G,
4500G, 4500, 4200G and 4210
MANAGEMENT
Single console interface
Configuration via CL (Command Line nterface), Console port, Simple
Network Management Protocol (SNMP), embedded web interface
Remote configuration via TELNET
Embedded web management interface
System configuration with SNMP v1, 2c and 3
Comprehensive statistics, including ACL/QoS and P interface
Syslog
Pv4 management including ping, traceroute, TELNET, and remote ping
Pv6 management including pingv6, tracertv6, Telnetv6, TFTPv6, DNSv6
and ARPv6
Pv6 management interface P address configuration
Remote Monitoring (RMON) groups statistics, history, alarm and events
DHCP server including options 60, 82 and 184
Supports multiple software images and bank swap, stored in non-volatile
memory
1-to-1 port mirroring
Many-to-1 port mirroring
VLAN-to-1/flow-based port mirroring
Remote port mirroring (RSPAN)
Ability to apply ACL to mirror port and forward only certain traffic types
Detailed alarm and debug information
Front panel indicators for port and unit status information
Configuration file for backup and restore, stored in non-volatile
memory; multiple configuration files available
Backup and restore of software images
Network Time Protocol (NTP)
DHCP Relay and UDP Helper
System file transfer mechanisms: Xmodem, FTP, Secure FTP (SFTP),
Trivial FTP (TFTP)
Virtual Cable Test (VCT) function
Link Layer Discovery Protocol (LLDP) and LLDP-MED
sFlow
Power alarms; fan and temperature alarms
Debugging information output
Device Link Detection Protocol (DLDP)
Port loopback detection
Management applications:
• 3Com ntelligent Management Center ( MC)
• 3Com Network Supervisor (3NS)
• 3Com Network Director (3ND)
• 3Com Enterprise Management Suite (EMS)
• QuidView Network Management Systems (NMS)
DIMENSIONS
Height: 43.6 mm (1.7 in or 1 RU)
Width: 440.0 mm (17.4 in)
Depth:
24- and 48-port non-PWR: 300.0 mm (11.8 in)
24- and 48-port PWR: 420.0 mm (16.5 in)
24-port SFP: 360.0 mm (14.2 in)
Weight:
Switch 4800G 24-Port: 4.0 kg (8.8 lbs)
Switch 4800G 48-Port: 4.5 kg (9.9 lbs)
Switch 4800G PWR 24-Port: 6.0 kg (13.2 lbs)
Switch 4800G PWR 48-Port: 6.5 kg (14.3 lbs)
Switch 4800G 24-Port SFP: 6.3 kg (13.9 lbs)
POWER SUPPL
AC
Rated voltage range: 100 V to 240, 50/60 Hz
PECIFICATION (continued)

73COM WITCH 4800G GIGABIT FAMILY
DC-rated voltage range (for RP )
Switch 4800G 24-Port: 10.8 to 13.2
Switch 4800G 48-Port: 10.8 to 13.2; -52 to –55
Switch 4800G PWR 24-Port: -52 to –55
Switch 4800G PWR 48-Port: -52 to –55;-48 to –60
Switch 4800G 24-Port SFP: -48 to –60
Power consumption (max)
Switch 4800G 24-Port: 67 W
Switch 4800G 48-Port: 114 W
Switch 4800G PWR 24-Port: 93 W, plus up to 370 W for PoE
Switch 4800G PWR 48-Port: 147 W, plus up to 370 W for PoE
Switch 4800G 24-Port SFP: 68 W
Optional RPS available to provision additional PoE power to ports
(PWR models only)
ENVIRONMENTAL REQUIREMENTS
Operating temperature: 0° to 45°C (32° to 113°F)
Operating humidity: 10% to 90% non-condensing
Heat dissipation (max)
Switch 4800G 24-Port: 227 BTU/hour
Switch 4800G 48-Port: 389 BTU/hour
Switch 4800G PWR 24-Port: 316 BTU/hour; excludes heat from PoE
Switch 4800G PWR 48-Port: 502 BTU/hour; excludes heat from PoE
Switch 4800G 24-Port SFP: 231 BTU/hour
RELIABILIT
24-port: 42 years (374,000 hours)
48-port: 37 years (328,000 hours)
24-port PWR: 44 years (389,000 hours)
48-port PWR: 35 years (307,000 hours)
24-port SFP: 36 years (322,000 hours)
EMISSIONS/AGENC APPROVALS
C SPR 22 Class A
FCC Part 15 Class A
EN 55022 1998 Class A
EN 61000-3-2 2000, 61000-3-3
CES-003 Class A
VCC Class A
IMMUNIT
EN 55024
SAFET AGENC CERTIFICATIONS
UL 60950
EC 60950-1
EN 60950-1
CAN/CSA-C22.2 No. 60950-1-03
STANDARDS AND PROTOCOLS
IEEE standards
EEE 802.1AB (LLDP)
EEE 802.1ag Service Layer OAM
EEE 802.1D (STP)
EEE 802.1p (CoS)
EEE 802.1 PAE (PAE M B)
EEE 802.1Q GVRP (GVRP)
EEE 802.1s (MSTP)
EEE 802.1v (Protocol-based VLANs)
EEE 802.1w (RSTP)
EEE 802.1X (Network Login)
EEE 802.3 LAG (LAG M B)
EEE 802.3ab (1000BASE-T)
EEE 802.3ac (VLAN Tagging Extension)
EEE 802.3ad (Link Aggregation)
EEE 802.3ae (10 Gigabit Ethernet)
EEE 802.3af (Power over Ethernet)
EEE 802.3ag Ethernet OAM
EEE 802.3ah (Ethernet in First Mile over Point to Point Fiber - EFMF)
EEE 802.3i (10BASE-T)
EEE 802.3u (Fast Ethernet)
EEE 802.3x (Flow Control)
EEE 802.3z (Gigabit Ethernet)
RFC standards
RFC 768 (UDP)
RFC 791 ( P)
RFC 792 ( CMP)
RFC 793 (TCP)
RFC 826 (ARP)
RFC 854 and RFC 856 (TELNET)
RFC 925 (Multi-LAN Address Resolution)
RFC 950 ( P Datagram Forwarding)
RFC 951 (BootP)
RFC 1058 (R P v1)
RFC 1122 ( P Options)
RFC 1141 ( P Datagram Forwarding)
RFC 1157 (SNMPv1/v2)
RFC 1212 (Concise M B Definitions)
RFC 1213 (SNMP M B )
RFC 1215 (SNMP Traps)
RFC 1253 (OSPFv2 M B)
RFC 1305 (NTPv3)
RFC 1350 (TFTP)
RFC 1389 (R P M B)
RFC 1492 (HWTACACS)
RFC 1493 (Bridge Definitions)
RFC 1519 (C DR)
RFC 1542 (BootP)
RFC 1587 (OSPF NS SA)
RFC 1657 (BGP-4 M B)
RFC 1723 (R Pv2)
RFC 1724 (R Pv2 M B Extension)
RFC 1757 (RMON M B)
RFC 1771 (BGP)
RFC 1812 ( Pv4 Router Compliance)
RFC 1850 (OSPFv2 M B)
RFC 1881 ( Pv6 Address Allocation Management)
RFC 1886 ( Pv6 DNS Extensions)
RFC 1887 ( Pv6 Unicast Address Allocation Architecture)
RFC 1901 (SNMPv2)
RFC 1907 (SNMPv2c, SM v2 and Revised M B- )
RFC 1918 (Private nternet Address Allocation)
RFC 1981 ( Pv6 Path MTU Discovery)
RFC 2096 ( P Forwarding Table M B)
RFC 2012 (TCP SNMPv2 M B)
RFC 2080 ( Pv6/R Png)
RFC 2131 (DHCP Client)
RFC 2233 (M B)
RFC 2236 ( GMP Snooping)
RFC 2284 (EAP over LAN)
RFC 2328 (OSPFv2)
RFC 2373 ( Pv6 Addressing Architecture)
RFC 2375 ( Pv6 Multicast Address Assignments)
RFC 2401 ( P Security Architecture)
RFC 2402 ( P Authentication Header)
RFC 2406 ( P Encapsulating Security Payload)
RFC 2409 ( KE)
RFC 2452 (TCP/ P)
RFC 2454 (UDP6)
RFC 2460 ( Pv6 Specification)
RFC 2461 ( Pv6/ND)
RFC 2462 ( Pv6 Stateless Address Auto-configuration)
RFC 2463 ( CMPv6)
RFC 2464 ( Pv6 Over Ethernet)
RFC 2465 and 2466 ( Pv6 M B)
RFC 2474 (DSCP Diffserv)
RFC 2475 ( Pv6 Diffserv Architecture)
PECIFICATION (continued)

83COM WITCH 4800G GIGABIT FAMILY
3Com Corporation, Corporate Headquarters, 350 Campus Drive, Marlborough, MA 01752-3064
3Com is publi ly traded on NASDAQ under the symbol COMS.
Copyright © 2010 3Com, the 3Com logo and XRN, and H3C, are registered trademarks in various ountries worldwide of 3Com Corporation and H3C Te hnologies
Co., Ltd., respe tively. Guardian and Express are servi e marks of 3Com Corporation. While every effort is made to ensure the information given is a urate, 3Com
does not a ept liability for any errors or mistakes whi h may arise. All spe ifi ations are subje t to hange without noti e. 401083-010 03/10
Visit www.3com.com for more information about 3Com network solutions.
PRODUCT DE CRIPTION 3COM KU
3Com Switch 4800G 24-Port 3CRS48G-24-91
3Com Switch 4800G 48-Port 3CRS48G-48-91
3Com Switch 4800G PWR 24-Port 3CRS48G-24P-91
3Com Switch 4800G PWR 48-Port 3CRS48G-48P-91
3Com Switch 4800G 24-Port SFP 3CRS48G-24S-91
MODULE
2-Port 10-Gigabit Module (XFP) 3C17766
2-Port Local Connection Module 3C17767
1-Port 10-Gigabit Module (XFP) 3C17768
2-Port 10-Gigabit Module (SFP+) 0231A98L
2-Port Gigabit Module (SFP) 0231A833
POWER UPPLIE
3Com Switch 4800G 24-Port SFP AC Power Module†0231A66A
10GIGABIT XFP TRAN CEIVER
10GBASE-LR 0231A438
10GBASE-SR 0231A494
10GBASE-CX4 3CXFP95
10GBASE-ER 3CXFP96
10GIGABIT FP+ TRAN CEIVER
10GBASE-LR 0231A0A8
10GBASE-SR 0231A0A6
10GBASE-LRM 0231A0A7
†For the Switch 4800G 24-Port SFP only. The switch ships with one PSU and
one empty redundant PSU slot. Order this for 1+1 PSU redundancy.
PRODUCT DE CRIPTION 3COM KU
GIGABIT FP TRAN CEIVER
1000BASE-SX 3CSFP91
1000BASE-LX 3CSFP92
1000BASE-T 3CSFP93
1000BASE-LH 3CSFP97
FA T GIGABIT FP TRAN CEIVER
100BASE-SX 3CSFP81
100BASE-LX10 0231A564
100BASE-BX10-D 3CSFP85
100BASE-BX10-U 3CSFP86
100BASE-FX (Dual-Mode) 3CSFP9-81
100BASE-LX (Dual-Mode) 3CSFP9-82
CABLE
CX4 Local Connection Cable – 50 cm 3C17775
CX4 Local Connection Cable – 100 cm 3C17776
CX4 Local Connection Cable – 300 cm 3C17777
3COM GLOBAL ERVICE
3Com Network Health Check, nstallation Services and
Express Maintenance www.3com.com/services_quote
3Com Global Education and Training Courses www.education.3com.com
ORDERING INFORMATION
RFC 2526 (Reserved Pv6 Anycast Addresses)
RFC 2571 (SNMP Framework)
RFC 2572 - 2576 (SNMP)
RFC 2578 (New Traps)
RFC 2581 (TCP6)
RFC 2597 (Assured Forwarding)
RFC 2598 (Expedited Forwarding)
RFC 2616 (HTTP Compatibility v1.1)
RFC 2618 (RAD US Authentication Client M B)
RFC 2620 (RAD US Accounting Client M B)
RFC 2644 (Directed Broadcast Control)
RFC 2710 (MLD Pv6/MLD Snooping)
RFC 2740 (OSPFv3)
RFC 2767 (Dual stacks Pv4 & Pv6)
RFC 2819 (RMON M B)
RFC 2858 (BGP-4 Multi-protocol Extensions)
RFC 2865 (Remote Authentication Dial- n User RAD US)
RFC 2866 (RAD US RFC 2138/ Accounting)
RFC 2893 ( Pv6 Host and Router Transition Mechanism)
RFC 2925 (Ping M B)
RFC 3056 (6to4 Tunneling)
RFC 3246 (Expedited PHB)
RFC 3306 (Unicast Prefix-Based Pv6 Multicast Addresses)
RFC 3307 ( Pv6 Multicast Address Allocation)
RFC 3410 (SNMP)
RFC 3414 (SNMP User-Based SM M B)
RFC 3415 (SNMP View-based ACM M B)
RFC 3416 (SNMPv2)
RFC 3417 (SNMP Transport)
RFC 3484 ( Pv6 Default Address Selection)
RFC 3493 ( Pv6 Basic Socket nterface)
RFC 3513 ( Pv6 Addressing Architecture)
RFC 3542 (Advanced Sockets AP for Pv6)
RFC 3587 ( Pv6 Global Unicast Address)
RFC 3596 ( Pv6/DNS6 Extensions)
RFC 3623 (OSPF GR)
RFC 3768 (VRRP)
RFC 3704 Unicast Reverse Path Forwarding (URPF)
RFC 3810 (MLDv2)
RFC 4113 ( Pv6 M B for UDP)
RFC 4213 ( Pv6 Host and Routers Transition Mechanisms)
RFC 4443 ( CMPv6 for Pv6)
PECIFICATION (continued)