Cisco 4948 Series User manual

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DATA SHEET
CISCO CATALYST 4948-10GE SWITCH
10 Gigabit Ethernet Switching for High-Performance, Rack-Optimized Server Switching
PRODUCT OVERVIEW
The Cisco®Catalyst®4948-10GE Switch is a wire-speed, low-latency, Layer 2–4, 1-rack-unit (1-RU), fixed-configuration switch for rack-optimized
server switching. Based on the proven Cisco Catalyst 4500 Series hardware and software architecture, the Cisco Catalyst 4948-10GE offers
exceptional performance, bandwidth, and reliability for low-density, multilayer aggregation of high-performance servers and workstations.
The Cisco Catalyst 4948-10GE offers 48 ports of wire-speed 10/100/1000BASE-T with 2 ports of wire-speed 10 Gigabit Ethernet (X2 optics).
Exceptional reliability and serviceability are delivered with optional internal AC or DC 1+1 hot-swappable power supplies and a hot-swappable
fan tray with redundant fans (Figures 1 and 2).
Figure 1. Cisco Catalyst 4948-10GE Switch
Figure 2. Rear View of Cisco Catalyst 4948-10GE Switch with Dual Redundant Power Supplies and Removable Fan Tray

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KEY FEATURES AND BENEFITS
Wire-Speed Performance in All Directions
The Cisco Catalyst 4948-10GE delivers wire-speed throughput with low latency for data-intensive applications using a 136-Gbps switching fabric
with a 102 million packets per second (mpps) forwarding rate in hardware for Layer 2–4 traffic. High-performance switching is maintained
regardless of the number of route entries or Layer 3 and 4 services enabled. Hardware-based Cisco Express Forwarding routing architecture allows
for increased scalability and performance. X2 10 Gigabit Ethernet optics provide 20 Gigabit Ethernet wire-speed uplinks for maximum throughput
of traffic.
Power-Supply Redundancy for Nonstop Operation
The Cisco Catalyst 4948-10GE provides reliability for critical applications with 1+1 redundant, hot-swappable internal AC or DC power supplies.
The 1+1 power-supply design provides A-to-B failover when power supplies are connected to different circuits. AC and DC power supplies can be
mixed in the same unit for maximum deployment flexibility. The Cisco Catalyst 4948-10GE also has a hot-swappable fan tray with four redundant
fans for additional serviceability and availability.
Robust Network Security
Multiple server communities can be securely established on a single Cisco Catalyst 4948-10GE. The switch can isolate different Layer 2 community
traffic simultaneously, while conserving IP address space. In an unlikely event that a server is compromised, the Cisco Catalyst 4948-10GE can
prevent man-in-the-middle and IP-spoofing attacks to the rest of community with no change to the server configuration. Such attacks can be logged
by the Cisco Catalyst 4948-10GE for auditing.
The Cisco Catalyst 4948-10GE offers a rich blend of network-traffic security capabilities. Security policies can be easily defined with access control
lists (ACLs). All ACL lookups are done in hardware, so wire-speed forwarding and routing performance are not affected when enabling ACL-based
wire-rate security in the network. The Cisco Catalyst 4948-10GE also supports Secure Shell (SSH) Protocol Version 1 and 2 and Simple Network
Management Protocol Version 3 (SNMPv3) for secure remote access and network management.
Comprehensive Management
The Cisco Catalyst 4948-10GE includes a single, dedicated 10/100 console port and a single, dedicated 10/100 management port for offline disaster
recovery. Remote in-band management is available with SNMP, Telnet client, BOOTP, and Trivial File Transfer Protocol (TFTP). Support for local
or remote out-of-band management is delivered through a terminal or modem attached to the console interface. The management port helps enable
the Cisco Catalyst 4948-10GE to reload a new image from a TFTP server within seconds.
The Cisco Catalyst 4948-10GE delivers a comprehensive set of management tools to provide the visibility and control required for server switching.
Managed with CiscoWorks solutions and embedded CiscoWorks CiscoView, the Cisco Catalyst 4948-10GE can be configured and managed to
deliver device, VLAN, traffic, and policy management. These Web-based management tools offer numerous services, including software deployment
and quick isolation of error conditions.

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SOFTWARE CONFIGURATION OPTIONS
Table 1 describes the software configuration options for the Cisco Catalyst 4948-10GE.
Table 1. Software Configuration Options for the Cisco Catalyst 4948-10GE
Software Image Description
IP Base Image Standard Layer 3 image, including Routing Information Protocol Version 1 (RIPv1), RIPv2, static routes
Enterprise Services Image Enhanced Layer 3 image, including Open Shortest Path First (OSPF), Intermediate System-to-Intermediate
System (IS-IS), Enhanced Interior Gateway Routing Protocol (EIGRP), and Border Gateway Protocol (BGP)
AppleTalk, and Internetwork Packet Exchange (IPX) software routing. Also includes all SMI features.
Table 2 compares the Cisco Catalyst 4948 Switch to the Catalyst 4948-10GE Switch.
Table 2. Comparison Between Cisco Catalyst 4948 and Catalyst 4948-10GE
Feature and Description Cisco Catalyst 4948 Cisco Catalyst 4948-10GE
Layer 2–4 Performance 72 mpps and 96 Gbps 102 mpps and 136 Gbps
Uplink Optic Types 4 SFP optics Two X2 (10 GE) optics
Switching Capacity 96 Gbps 136 Gbps
Throughput 72 mpps 102 mpps
Multilayer Switching Full Layer 2–4 services and routing Full Layer 2–4 services and routing
Minimum Software Requirement Cisco IOS®Software Release 12.2(20)EWA
or later Cisco IOS Software Release 12.2(25)EWA or later
CPU 266 MHz 666 MHz
Synchronous Dynamic RAM (SDRAM) 256 MB 256 MB
Active VLANs 2048 2048
Multicast Entries •28,000 (Layer 3)
•16,000 (Layer 2)
•28,000 (Layer 3)
•16,000 (Layer 2)
Per VLAN Spanning Tree (PVST) and
VLAN IDs 4096 4096
Spanning Tree Protocol Instances 1500 1500
Switched Virtual Interfaces (SVIs) 2k 2k
PREDICTABLE PERFORMANCE AND SCALABILITY
The Cisco Catalyst 4948-10GE is optimized for multimedia applications with its advanced multicast support. It supports Protocol Independent
Multicast (PIM), Source Specific Multicast (SSM), and Pragmatic General Multicast (PGM), providing end users with additional scalability to
support multimedia applications. Also supported is Internet Engineering Task Force (IGMP) snooping in hardware, enhancing performance and
reducing network traffic by allowing a switch to dynamically add and remove hosts from a multicast group.
INTELLIGENT NETWORK SERVICES WITH QOS AND SOPHISTICATED TRAFFIC MANAGEMENT
The Cisco Catalyst 4948-10GE offers superior per-port quality of service (QoS) features to help ensure that network traffic is classified, prioritized,
and scheduled optimally to efficiently manage bandwidth-hungry multimedia, and time-sensitive and mission-critical applications. The Catalyst
4948-10GE can classify, police, and mark incoming packets, allowing the administrator to differentiate between traffic flows and enforce policies.

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Sharing, shaping, and strict-priority configurations determine scheduling of egress traffic. The Catalyst 4948-10GE also supports Dynamic Buffer
Limiting (DBL), a congestion-avoidance feature. For details about the QoS features (including DBL) on the Catalyst 4948-10GE, refer to the QoS
on Cisco Catalyst 4500 Series supervisor engines overview at:
http://www.cisco.com/en/US/partner/products/hw/switches/ps4324/prod_white_papers_list.html
FEATURES AT A GLANCE
Layer 2 Features
•Layer 2 hardware forwarding at 102 mpps
•Layer 2 switch ports and VLAN trunks
•IEEE 802.1Q VLAN encapsulation
•Inter-Switch Link (ISL) VLAN encapsulation
•Dynamic Trunking Protocol (DTP)
•VLAN Trunking Protocol (VTP) and VTP domains
•Support for 2048 VLANs per switch
•Per-VLAN Spanning Tree (PVST) and PVST Plus (PVST+)
•Spanning-tree PortFast and PortFast guard
•Spanning-tree UplinkFast and BackboneFast
•802.1s
•802.1w
•802.3ad
•Spanning-tree root guard
•Cisco Discovery Protocol versions 1 and 2
•IGMP snooping versions 1, 2, and 3
•Cisco EtherChannel®technology, Cisco Fast EtherChannel technology, and Cisco Gigabit EtherChannel technology
•Port Aggregation Protocol (PAgP)
•Link Aggregation Control Protocol (LACP)
•Unidirectional link detection (UDLD) and aggressive UDLD
•802.1q-in-802.1q (QinQ) in hardware
•Layer 2 protocol tunneling
•Multilayer Jumbo Frames (up to 9216 bytes)
•Baby Giants (up to 1600 bytes)
•Unidirectional Ethernet
•Storm control (formally known as broadcast and multicast suppression)
•Forced 10/100 autonegotiation
Layer 3 Features
•Hardware-based IP Cisco Express Forwarding routing at 102 mpps
•IP routing protocols: EIGRP, OSPF, RIP, and RIP2
•BGP4 and Multicast Border Gateway Protocol (MBGP)
•Nonstop Forwarding awareness
•Hot Standby Router Protocol (HSRP)
•Software routing of Internetwork Packet Exchange (IPX) and AppleTalk
•IS-IS routing protocol

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•IGMP v1, v2, and v3
•IGMP filtering on access and trunk ports
•IP Multicast routing protocols: PIM, SSM, and Distance Vector Multicast Routing Protocol (DVMRP)
•Pragmatic General Multicast (PGM)
•Cisco Group Multicast Protocol server
•Full Internet Control Message Protocol (ICMP) support
•ICMP Router Discovery Protocol
•Policy-based routing (PBR)
•Virtual Route Forwarding lite (VRF-lite)
•IPv6 (software switched)
•OSPF fast convergence
Sophisticated QoS and Traffic Management
•Per-port QoS configuration
•Support for four queues per port
•Strict priority queuing
•IP differentiated services code point (DSCP)
•Classification and marking based on IP type of service (ToS) or DSCP
•Classification and marking based on full Layer 3 and Layer 4 headers
•Input and output policing based on Layer 3 and Layer 4 headers
•Support for 512 policers on ingress and 512 policers on egress
•Shaping and sharing output queue management
•DBL—congestion-avoidance feature
•No performance penalty for granular QoS functions
•Per-port, per-vlan QoS
Predictable Performance
•136 Gbps switching fabric
•Layer 2 hardware forwarding at 102 mpps
•Layer 3 hardware-based IP Cisco Express Forwarding routing at 102 mpps
•Layer 4 TCP/User Datagram Protocol (UDP) hardware-based filtering at 102 mpps
•No performance penalty with advanced Layer 3 and Layer 4 services enabled
•Software-based learning at a sustained rate of 3000 hosts per second
•Support for 55,000 unicast and 16000 multicast MAC addresses
•Support for 32,000 entries in routing table (shared between unicast and multicast)
•Scalability to 2000 virtual ports (VLAN port instances)
•Bandwidth aggregation up to 40 Gbps using Cisco Gigabit Ethernet EtherChannel technology
•Hardware-based multicast management
•Hardware-based ACLs, router ACLs (RACLs), VLAN ACLs
Comprehensive Management
•Manageable through Cisco Network Assistant
•Single console port and single IP address to manage all system features
•Software configuration management, including local and remote storage

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•Manageable through CiscoWorks Windows network-management software on a per-port and per-switch basis, providing a common management
interface for Cisco routers, switches, and hubs
•SNMPv1, v2, and v3 instrumentation, delivering comprehensive in-band management
•CLI-based management console to provide detailed out-of-band management
•Remote Monitoring (RMON) software agent to support four RMON groups (history, statistics, alarms, and events) for enhanced traffic
management, monitoring, and analysis
•Support for all nine RMON groups through the use of a Cisco SwitchProbe®analyzer (Switched Port Analyzer [SPAN]) port, which permits
traffic monitoring of a single port, a group of ports, or the entire switch from a single network analyzer or RMON probe
•Analysis support, including ingress port, egress port, and VLAN SPAN
•Layer 2 traceroute
•Remote SPAN (RSPAN)
•Cisco SmartPort macros
•SPAN ACL filtering
•Dynamic Host Configuration Protocol (DHCP) client autoconfiguration
•Enhanced SNMP MIB support
•HTTPS
•Time Domain Reflectometry (TDR)
Advanced Security
•TACACS+ and RADIUS, which help enable centralized control of the switch and restrict unauthorized users from altering the configuration
•Standard and extended ACLs on all ports
•802.1x user authentication (with VLAN assignment, voice VLAN, port security, guest VLAN, private guest VLAN, private VLAN, RADIUS
Supplied Session Timeout extensions)
•802.1x accounting
•802.1x authentication failure
•802.1x Private VLAN assignment
•802.1x Private Guest VLAN
•802.1x Radius-supplied time out
•Trusted boundary
•Router ACLs (RACLs) on all ports (no performance penalty)
•VLAN ACLs (VACLs)
•Port ACLs (PACLs)
•Private VLANs (PVLANs) on access and trunk ports
•DHCP snooping
•DHCP Option 82
•DHCP Option 82 insertion
•DHCP Option 82 Pass Through
•Port security
•Sticky port security
•SSHv1 and SSHv2
•VLAN Management Policy Server (VMPS) client
•Unicast MAC filtering
•Unicast port flood blocking
•Dynamic Address Resolution Protocol (ARP) inspection

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•IP source guard
•Community Private VLANs
•Trunk Port Security
TECHNICAL SPECIFICATIONS
Management
•CiscoWorks LMS; includes CiscoWorks Resource Manager Essentials
•CiscoView
•Cisco Network Assistant
•SNMPv1, v2, and v3
•RMON I and II
•RFC 1213-MIB (MIB II)
•UDP-MIB
•TCP-MIB
•CISCO-FLASH-MIB
•CISCO-IMAGE-MIB
•RFC 2233 (IF-MIB)
•CISCO-CONFIG-MAN-MIB
•CISCO-MEMORY-POOL
•CISCO-CDP-MIB
•RMON-MIB lite (RFC 1757)
•RMON2-MIB lite (RFC 2021)
•HC-RMON-MIB
•SMON-MIB
•ENTITY-MIB (V1-RFC 2037) (V2- RFC 2737)
•CISCO-PROCESS-MIB
•CISCO-CONFIG-COPY-MIB
•CISCO-ENTITY-EXT-MIB
•CISCO-ENTITY-ASSET-MIB
•CISCO-ENTITY-FRU-CONTROL-MIB
•CISCO-ENTITY-SENSOR-MIB
•CISCO-ENVMON-MIB
•BRIDGE-MIB (RFC 1493)
•CISCO-PAGP-MIB
•CISCO-PRIVATE-VLAN-MIB
•CISCO-STP-EXTENSIONS-MIB
•CISCO-VLAN-MEMBERSHIP-MIB
•CISCO-VLAN-IFTABLE-RELATIONSHIP-MIB
•IGMP-MIB
•PIM-MIB
•OSPF-MIB
•CISCO-ENTITY-VENDORTYPE-OID-MIB
•CISCO-SYSLOG-MIB

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•BGP4-MIB
•CISCO-BULK-FILE-MIB
•CISCO-CLASS-BASED-QOS-MIB
•CISCO-FTP-CLIENT-MIB
•CISCO-HSRP-MIB
•CISCO-IGMP-FILTER-MIB
•CISCO-IPMROUTE-MIB
•CISCO-PORT-SECURITY-MIB
•CISCO-RMON-CONFIG-MIB
•CISCO-VTP-MIB
•ETHERLIKE-MIB
•EXPRESSION-MIB
•CISCO-PORT-STORM-CONTROL-MIB
•IS-IS MIB
•RIP SNMP MIB
Industry Standards
•Ethernet—IEEE 802.3 and 10BASE-T
•Fast Ethernet—IEEE 802.3u, 100BASE-TX, and 100BASE-FX
•Gigabit Ethernet—IEEE 802.3z and 802.3ab
•IEEE 802.1D Spanning Tree Protocol
•IEEE 802.1w rapid reconfiguration of spanning tree
•IEEE 802.1s multiple VLAN instances of spanning tree
•IEEE 802.3ad LACP
•IEEE 802.1p class-of-service (CoS) prioritization
•IEEE 802.1Q VLAN
•IEEE 802.1x user authentication
•X2 support
•RMON I and II standards
Indicator and Port Specifications
•System status—Green (operational); red (faulty)
•Console—RJ-45 female
•Reset (switch recessed protected)
•Uplinks—Link and active
•Image management port—10/100BASE-TX (RJ-45 female) data terminal equipment (DTE); green (good); orange (disabled); off (not connected)

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Supported X2 Optics
Table 3 lists the X2 optics supported by the Cisco Catalyst 4948-10GE.
Table 3. X2 Optics Supported by Cisco Catalyst 4948-10GE
Type Maximum Distance over Specified Medium
LR 10 km on single-mode fiber (SMF) (G.652)
CX4 Up to 15m on IBX4 cable
LX4 300m on multimode fiber (MMF)
SR 26m on MMF
ER 40 km on SMF*
* Available in Q4 2005
Power-Supply Specifications
The Cisco Catalyst 4948-10GE offers a choice of 300-watt (W) AC or DC power supplies. The switch can operate with one power supply present.
When two power supplies are installed, the switch shares the power load between the two supplies (Table 4).
Table 4. AC and DC Power-Supply Specifications
300W AC 300W DC
Input Current •4A at 100V
•2A at 240V
8A at –48 to –60V
Output Current 25A at 12 VDC 25A @ 12 VDC
Weight Weight 2.0 kg Weight 2.0 kg
Heat Dissipation 1023 BTU/hr 1023 BTU/hr
Switch Dimensions
•Width: 17.290 inches (43.9166 centimeters [cm])
•Depth: 16.14 inches (40.9956 cm)
•Height: 1.712 inches (4.445 cm)
•Weight: 16.5 pounds (7.48 kilograms [kg]) with one power supply
Software Requirements
The Cisco Catalyst 4948-10GE is supported only in Cisco IOS Software and is not supported in the Cisco Catalyst Operating System Software
(CatOS). The minimum software version is Cisco IOS Software Release 12.2(25)EWA or later.
Environmental Conditions
•Operating temperature: 32º to 104ºF (0º to 40ºC)
•Storage temperature: –40º to 167ºF (–40º to 75ºC)
•Relative humidity: 10 to 90 percent, noncondensing
•Operating altitude: –60 to 2000m

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Regulatory Standards Compliance
Table 5 lists the Cisco Catalyst 4948-10GE regulatory standards compliance.
Table 5. Regulatory Standards Compliance for Cisco Catalyst 4948-10GE
Specification Description
Regulatory Compliance Products bear CE Marking, indicating compliance with the 89/336/EEC and 73/23/EEC directives, which
include the following safety and EMC standards.
Safety •UL 60950-1
•EN 60950-1
•AS/NZS 60950
•IEC 60825-2
•EN 60825-2
•CAN/CSA-C22.2 No. 60950-1
•IEC 60950-1
•IEC 60825-1
•EN 60825-1
•21 CFR 1040
EMC •FCC Part 15 (CFR 47) Class A
•EN55022 Class A
•AS/NZS 3548 Class A
•EN55024
•EN50082-1
•EN61000-3-3
•ICES-003 Class A
•CISPR22 Class A
•VCCI Class A
•ETS300 386
•EN61000-3-2
Table 6 lists the industry EMC, safety, and environmental standards for the Cisco Catalyst 4948-10GE.
Table 6. Industry EMC, Safety, and Environmental Standards
Specification Description
Network Equipment Building
Standards (NEBS) •GR-63-Core NEBS Level 3 (pending)
•GR-1089-Core NEBS Level 3 (pending)
ETSI •ETS 300 019 Storage Class 1.1(pending)
•ETS 300 019 Transportation Class 2.3 (pending)
•ETS 300 019 Stationary Use Class 3.1(pending)
Table 7 lists ordering information for the Cisco Catalyst 4948-10GE.
Table 7. Ordering Information
Product Number Description
WS-C4948-10GE-S Cisco Catalyst 4948-10GE, IP Base Image (RIP, static routes,), one AC power supply, fan tray
WS-C4948-10GE-E Cisco Catalyst 4948-10GE, Enterprise Services Image (OSPF, EIGRP, IS-IS, BGP, IPX, AppleTalk), one
AC power supply, fan tray
WS-C4948-10GE Cisco Catalyst 4948-10GE, optional software image, optional power supplies, fan tray
S49L3K9-12225EWA(=) SMI: RIP, static routes, IPX, AppleTalk, Triple Digital Encryption Standard (3DES) image
S49L3-12225EWA(=) SMI: RIP, static routes, IPX, AppleTalk
S49L3EK9-12225EWA(=) EMI: OSPF, IS-IS, EIGRP, BGP 3DES image