Datasheet Switch

Te c h n i c a l I n fo r m a t i o n
DATA SHEET
Catalyst 2948G-L3 Switch—High-Performance Layer 3 Switching
THE CATALYST® 2948G-L3 SWITCH IS A FIXED-CONFIGURATION LAYER 3 (L3) ETHERNET SWITCH FEATURING
WIRE-SPEED SWITCHING FOR INTERNET PROTOCOL (IP), INTERNETWORK PACKET EXCHANGE (IPX®), AND IP
MULTICAST. THIS NEW CATALYST SWITCH PROVIDES THE HIGH-PERFORMANCE THAT IS REQUIRED FOR
MID-SIZE CAMPUS BACKBONES WITH JUST THE RIGHT PORT DENSITY. IT IS IDEAL FOR AGGREGATING
MULTIPROTOCOL TRAFFIC FROM MULTIPLE WIRING CLOSETS OR WORKGROUP SWITCHES SUCH AS THE
CATALYST 2900, CATALYST 3500, CATALYST 4000, OR CATALYST 5000 SWITCHES.
The Catalyst 2948G-L3 switch provides non-blocking routing and
switching for IP, IPX, and IP multicast while also offering
wire-speed Layer 2 switching for non-routable protocols such as
NetBIOS and DECnet local-area transport (LAT). This capability
allows network managers to augment their multi- protocol
backbones with the Catalyst 2948G-L3 without having to build
parallel networks, as is often required with IP-only switches.
Catalyst 2948G-L3 Features at a Glance
• Dedicated 48 ports of 10/100-Mbps Ethernet and two ports of
1000BaseX Gigabit Ethernet with gigabit interface converter
(GBIC) support; all ports with Layer 3 switching capability
• High-performance—more than 10 Mpps Layer 3 switching and
routing of IP, IPX switches, and IP multicast
• 22 Gbps non-blocking switch fabric
• High-performance CPU with Cisco IOS® system software
• Quality of service (QoS)—multiple queues with weighted
round robin (WRR) scheduling
• Comprehensive management tools based on standard
CiscoWorks2000 applications
• Optional redundant external power supply
Figure 1 Catalyst 2948G-L3 Fixed-Configuration Wire-Speed Layer 3
Switch
Introducing the Catalyst 2948G-L3
The Catalyst 2948G-L3 is a fixed-configuration Layer 3 Ethernet
switch with 48 RJ-45 10/100 ports and two Gigabit Ethernet
uplink ports with modular GBIC interfaces. The switch is ideal
for backbone deployment in small to mid-sized networks that
require wire-speed Layer 3 performance but do not require the
high 10/100 Mbps Ethernet port counts or Gigabit Ethernet
density offered in the Catalyst 6000 and Catalyst 8500 series of
switches.
Catalyst 2948G-L3 Overview
The Catalyst 2948G-L3 provides an aggregate throughput of
more than 10 Mpps for Layer 3 switching. These data rates apply
not only to IP and IPX traffic but also to IP multicast and bridged
traffic and are a result of using high-speed application-specific
integrated circuit (ASIC) technology on each port to perform true
Layer 3 switching. The Catalyst 2948G-L3 supports a
high-performance architecture with 22 Gbps bandwidth. The
switch fabric is capable of supporting all 48 10/100 ports and two
Gigabit uplinks simultaneously at wire speed.
The Catalyst 2948G-L3 is housed in a 1.5 rack unit (RU)
chassis and can be provisioned with an optional external
redundant power supply. It supports a 22 Gbps shared-memory,
fully non-blocking switch fabric, high- performance RISC
processor that provides the routing intelligence and individual
port-based ASICs for the Layer 3 switching. The Catalyst
2948G-L3 uses Cisco Express Forwarding (CEF), which has been
developed for the Cisco 12000 series gigabit switch router (GSR),
the Catalyst 8500, and the Cisco 7500. This technology provides
Layer 3 switching based on a topology map of the entire network
that is distributed to each port-based ASIC, allowing it to make
autonomous switching decisions without the involvement of a
centralized CPU.
Catalyst 2948G-L3 Layer 3 Highlights—IP at Millions of
Packets per Second
The Catalyst 2948G-L3 provides a complete IP routing solution
without sacrificing any of the services that are required to build a
scalable network. The Catalyst 2948G-L3 is a feature-rich switch
with full Cisco IOS implementation that allows network
managers to continue to administer and manage their networks as
they do today while scaling their backbone bandwidths to gigabit
speeds. The Catalyst 2948G-L3 supports all the routing protocols
that are used today in mid-sized networks. These protocols
include:
• Interior Gateway Routing Protocol (IGRP)
• Enhanced IGRP (EIGRP)
• Open Shortest Path First (OSPF)
• Routing Information Protocol (RIP) Versions 1 and 2
• Static routes
• Route redistribution
In addition to these routing protocols, the Catalyst 2948G-L3
supports all the additional protocols necessary to build scalable,
reliable networks, including:
• Hot Standby Router Protocol (HSRP)
• Internet Group Management Protocol (IGMP) 1 and 2
• Dynamic Host Configuration Protocol (DHCP) Relay
• Cisco Group Management Protocol (CGMP)
• Internet Control Message Protocol (ICMP)
• Gateway Discovery Protocol (GDP)
• ICMP Router Discovery Protocol (IRDP)
• Bootstrap Protocol (BOOTP) Relay
IPX Switching Feature Set
The Catalyst 2948G-L3 with its IPX wire-speed performance is
also a full-fledged IPX router with the enhancements only Cisco
IOS can offer. It provides basic services such as Novell NetWork
RIP and Service Advertising Protocols (SAPs), value-added
routing protocols such as Novell Enhanced IGRP, as well as route
distribution among all of these protocols. In addition, the
Catalyst 2948G-L3 supports those features that help to make a
large Novell network scale. These features include:
• Get Nearest Server (GNS) response filtering and round-robin
GNS support
• Novell RIP
• SAP, protocol, and NetBIOS name filtering
• Equal-cost path load sharing
• Variable RIP and SAP timers
• Novell NetBIOS type 20 propagation support for legacy
applications that continue to be mission critical
• Novell-compliant IPX ping utility
This feature set as well as the wire-speed IPX switching make
the Catalyst 2948G-L3 unique in terms of switching platforms.
IP Multicast Switching and Routing
The Catalyst 2948G-L3 supports IP multicast at wire speeds
across all its ports. As multicast applications such as Microsoft
NetShow and NetMeeting become more widely deployed,
end-to-end multicast support becomes increasingly important
with multicast routing protocols that are integral to a consistent
end-to-end multicast solution. The Catalyst 2948G-L3 supports
both Protocol-Independent Multicast (PIM) sparse and dense
modes, and Distance Vector Multicast Routing Protocol
(DVMRP) interoperability for legacy applications. The Catalyst
2948G-L3 provides support for IGMP, Versions 1 and 2, and
CGMP server capabilities for integrating IP multicast support
with Catalyst wiring closet switches. These protocols are
necessary not only for IP multicast clients to join groups but also
for efficient leave processing, which saves bandwidth and
end-station CPU cycles.
Fast EtherChannel and Gigabit EtherChannel Technologies
The Catalyst 2948G-L3 supports both Fast EtherChannel® and
Gigabit EtherChannel technologies, allowing network managers
to group up to four of the 10/100 ports into a channel and group
the two Gigabit Ethernets into an uplink channel.
Quality of Service
The Catalyst 2948G-L3 incorporates a centralized non- blocking
22-Gb shared-memory switching fabric. The rich QoS
capabilities of the switching fabric enable network managers to
protect mission-critical applications by supporting
delay-sensitive traffic while managing bandwidth in the campus
backbone. The switching fabric supports per-flowqueuing (PFQ),
differentiated delay priorities using a WRR scheduler for
delay-sensitive applications, and differentiated loss priorities for
managing congestion and traffic policing and shaping. The fast
packet memory embedded in the switching fabric is allocated
dynamically on a per-queue (flow) basis. This dynamic allocation
used in conjunction with user-defined queue thresholds and
configurable queue scheduling weights ensures that timesensitive
traffic is handled properly with no packet loss. These
thresholds and queuing weights can be dynamically adjusted with
CiscoAssure Policy Networking, allowing an end-to-end QoS
solution.
Security
The Catalyst 2948G-L3 has the ability to prevent security
breaches via the use of both IP and IPX access lists. This is useful
in preventing users from accessing certain applications or
services. The Catalyst 2948G-L3 supports both inbound and
outbound access lists on its two Gigabit Ethernet interfaces. These
access lists can be defined similar to any Cisco IOS router as
standard IPX access lists as well as standard and extended
IP-based access lists. Having both inbound and outbound control
of packets on the Gigabit Ethernets allows network managers to
prevent traffic both on egress as well as ingress on the 10/100
Ethernet ports. In addition, the Catalyst 2948G-L3 will have the
capability to prevent traffic communication between 10/100
Ethernet ports. When enabled, users on the 10/100 ports can only
send traffic to the Gigabit Ethernet ports and not to each other.
Comprehensive Network Management of CiscoWorks2000
The Catalyst 2948G-L3 is managed by the powerful
CiscoWorks2000 network management products option. The
Essentials product suite leverages the power of intranets with
browser-based access anywhere within the network. Network
managers can walk up to any browser console, simply identify
who they are via the access control interface, and immediately
begin checking on the uptime of each device, the active software
versions that are running the Catalyst 2948G-L3 and print a year
2000-compliant report. For drill-down, real-time device status
information, the network operations staff can launch the
award-winning CiscoView application from their
fault-management station and check on the health of the power
supplies, CPU, and the operational status of each port at a glance.
For more sophisticated network-wide information, network
managers can launch the CiscoWorks for Switched
Internetworks (CWSI) campus product bundle, which
automatically discovers the physical and logical representations of
the Catalyst switch networks. This object-based discovery system
offers detailed information on the location and type of each
switch within the network and the type of links that connect the
switches together and displays integrity reports on the
configurations between each switch. All this information is
provided graphically within the topology interface with search
and location utilities. This topology interface offers a convenient
launching point for other applications within CWSI campus,
including the Remote Monitoring (RMON)-based traffic-analysis
application.
Switched Port Analyzer (SPAN) functionality enables the user to
mirror traffic from any single port or multiple ports, for analysis
by a remote sniffer or RMON SwitchProbe product. Support for
local, out-of-band management is delivered through a terminal or
modem attached to either of the two EIA/TIA-232 interfaces;
remote in-band management is available via Simple Network
Management Protocol (SNMP), Telnet client, BOOTP, and Trivial
File Transfer Protocol (TFTP).
Summary
The Catalyst 2948G-L3 is a cost-effective, high-performance,
feature-rich Layer3 Ethernet switch ideally suited for small to
mid-size backbones that require Layer 3 switching in increments
of 48 10/100 connections. It supports wire-speed routing and
switching of IP, IPX, and IP Multicast across all interfaces. The
Catalyst 2948G-L3 features a dedicated configuration of 48 10/
100 Ethernet ports and 2 modular Gigabit Ethernet uplink ports.
This new Catalyst switch has a non-blocking, 22 Gbps
architecture that enables all ports to L3 switch simultaneously at
wire speed. The two gigabit uplinks support standard GBIC
technology, giving network managers the flexibility to select and
change gigabit interfaces in the Catalyst 2948G-L3 quickly.
Technical Specifications
Performance
• 22 Gbps switching fabric
• Over 10 million PPS wire-speed forwarding rate for 64-byte
packets
• MIPs RISC CPU-R5000, 16 MB Flash, 64 MB DRAM
• Route Entries: 12,000 minimum; 24,000 maximum
• 12 MB memory architecture shared by all ports
• Packet forwarding rate for 64-byte packets:
– 14,880 pps for 10-Mbps ports
– 148,800 pps for 100BaseT ports
– 1,488,000 pps for 1000BaseX ports
Management
• SNMP Management Information Base (MIB) II
Standards
• IEEE 802.3x full duplex on 10BaseT, 100BaseTX, and
1000BaseX ports
• IEEE 802.1D Spanning-Tree Protocol
• IEEE 802.1Q VLAN
• IEEE 802.3z 1000BaseX specification
• 1000BaseX (GBIC)
– 1000BaseSX
– 1000BaseLX/LH
– 1000BaseZX
• IEEE 802.3u 100BaseTX specification
• IEEE 802.3 10BaseT specification
Y2K
• Y2K compliant
Connectors and Cabling
• 10BaseT ports: RJ-45 connectors; two-pair Category 3, 4, or 5
unshielded twisted-pair (UTP) cabling
• 100BaseTX ports: RJ-45 connectors; two-pair Category 5 UTP
cabling
• 1000BaseX GBIC ports: SC fiber connectors, single mode or
multimode fiber
• Console and auxiliary port: RJ-45 connectors, RS-232 serial
cabling
Indicators
• Per-port status LEDs
– link up—illuminated
10 Mbps operation—Yellow
100 Mbps operation—Green
– link down—not illuminated
• System status LED—Green
Dimensions and Weight [H x W x D]
• 2.69 x 17.1 x 18 in. (6.6 x 43.4 x 45.7 cm)
• One-and-a-half rack unit
• 18 lb. (8.08 kg)
Environmental Conditions and Power Requirements
• Operating temperature: 32 to 113 F (0 to 45 C)
• Storage temperature: -4 to 149 F (-20 to 65 C)
• Operating relative humidity: 10 to 85% noncondensing
• Operating altitude: Up to 10,000 ft. (3000 m)
• Power consumption: 70W maximum; 239 BTU per hour
• AC input voltage/frequency: 100 to 120/200 to 240 VAC
(autoranging) 50 to 60 Hz
Safety Certifications
• UL 1950
• CSA 22.2 No. 950
• EN 60950
• IEC 950
• AS/NZS 3260, TS001
• CE
Electromagnetic Emissions Certifications
• FCC Part 15 Class A
• EN 55022B Class A (CISPR 22 Class A)
• VCCI Class A
• AS/NZS 3548 Class A
• BCIQ
• CE Marking
Ordering Information
Product Number Description
WS-C2948G-L3 Catalyst 2948G-L3 switch, fixed 48 10/100 FE, 2 1000BaseX (GBIC). Includes support for IP, IP multicast, and bridging
Note: GBIC modules need to be ordered separately
FR2948GL3-IP IP Switching License, Includes OSPF, IGRP, EIGRP
FR2948GL3-IPX IPX switching license
WS-G5484= 1000BaseSX GBIC module
WS-G5486= 1000BaseLX/LH GBIC module
Copyright © 1999 Cisco Systems, Inc. All rights reserved. Printed in the USA. SMARTnet is a trademark; Catalyst, Cisco, Cisco IOS, Cisco Systems, EtherChannel, and IPX are registered trademarks of Cisco Systems, Inc. or its
affiliates in the U.S. and certain other countries. All other trademarks mentioned in this document are the property of their respective owners. The use of the word partner does not imply a partnership relationship between Cisco and
any of its resellers. (9910R) 10/99 BW5664
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Corporate Headquarters
Cisco Systems, Inc.
170 West Tasman Drive
San Jose, CA 95134-1706
USA
http://www.cisco.com
Tel: 408 526-4000
800 553-NETS (6387)
Fax: 408 526-4100
European Headquarters
Cisco Systems Europe s.a.r.l.
Parc Evolic, Batiment L1/L2
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Tel: 33 1 69 18 61 00
Fax: 33 1 69 28 83 26
Americas
Headquarters
Cisco Systems, Inc.
170 West Tasman Drive
San Jose, CA 95134-1706
USA
http://www.cisco.com
Tel: 408 526-7660
Fax: 408 527-0883
Asia Headquarters
Nihon Cisco Systems K.K.
Fuji Building, 9th Floor
3-2-3 Marunouchi
Chiyoda-ku, Tokyo 100
Japan
http://www.cisco.com
Tel: 81 3 5219 6250
Fax: 81 3 5219 6001
WS-G5487= 1000BaseZX GBIC module
CAB-GELX-625 Gigabit Ethernet multimode conditioning cable
PWR600-RPS-YCAB= 600W redundant AC power system with DC power cables
STKRACKMOUNT1.5RU= Catalyst 2948G-L3 rack-mount kit (spare)
CON-SNT-WS-C2948 SMARTnet maintenance 8 x 5 x nbd
CON-SNTE-WS-C2948 SMARTnet maintenance 8 x 5 x 4
CON-SNTP-WS-C2948 SMARTnet maintenance 24 x 7 x 4
CON-OS-WS-C2948 SMARTnet maintenance Onsite 8 x 5 x nbd
CON-OSE-WS-C2948 SMARTnet maintenance Onsite 8 x 5 x 4
CON-OSP-WS-C2948 SMARTnet maintenance Onsite 24 x 7 x 4
Mini-RMON Agent License
WS-C2948G-EMS-LIC Catalyst 2948G-L3 RMON Agent License
Product Number Description