Catalyst 4948 Switch 48-port 10/100/1000bt GBit Enet Enhanced L3 Emi Ac Power

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Base Price:€9.153,48€11.075,71
Part Number: WS-C4948E
Language: ML
Minimum Order Quantity: 1


The Cisco Catalyst 4948 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 Series offers exceptional performance and reliability for low density, multilayer aggregation of high performance servers and workstations. The Cisco Catalyst 4948 offers 48 ports of wire-speed 10/100/1000BASE-T with 4 alternative wired ports that can accommodate optional 1000BASE-X Small Form-Factor Pluggable (SFP) optics1. 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


  • Wire-Speed Performance for 10/100/1000 Connectivity
    • The Cisco Catalyst 4948 delivers wire-speed throughput with low latency for data-intensive applications using a 96-Gbps switching fabric with a 72-Mpps forwarding rate in hardware for Layer 2-4 traffic. Switching performance is guaranteed 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.
    • The Cisco Catalyst 4948 has 52 physical switching ports (48 10/100/1000 and 4 SFP) on the front panel. Up to 48 of these ports can be active at one time in any combination.
  • Power Supply Redundancy for Nonstop Operation
    • The Cisco Catalyst 4948 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 also has a hot-swappable fan tray with four redundant fans for additional serviceability and availability.
  • Robust Security
    • Multiple server communities can be securely established on a single Cisco Catalyst 4948. 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 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 for auditing.
    • The Cisco Catalyst 4948 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 also supports Secure Shell (SSH Version 1 and Version 2) protocols and Simple Network Management Protocol Version 3 (SNMPv3) for secure remote access and network management.
  • Comprehensive Management
    • The Cisco Catalyst 4948 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 to reload a new image from a TFTP server within seconds.
    • The Cisco Catalyst 4948 delivers a comprehensive set of management tools to provide the visibility and control required for server switching. Managed with CiscoWorks solutions and embedded CiscoView, the Cisco Catalyst 4948 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.


  • Descriptions of Software Configuration Options for Cisco Catalyst 4948

Software Image


Standard multilayer image

Standard Layer 3 image, including Routing Information Protocol Version 1 (RIPv1), RIPv2, static routes, AppleTalk, and Internetwork Packet Exchange (IPX) software routing

Enhanced multilayer image

Enhanced Layer 3 image, including Open Shortest Path First (OSPF), Intermediate System-to-Intermediate System (IS-IS), and Enhanced Interior Gateway Routing Protocol (EIGRP), Border Gateway Protocol ( BGP)

  • Performance and Switching Specifications
    • 96-Gbps nonblocking switch fabric
    • 72-Mpps Layer 2 Forwarding (hardware)
    • 72-Mpps Layer 3 and Layer 4 forwarding-IP routing, Cisco Express Forwarding-based (hardware)
    • Layer 2-4 hardware-based switch engine (application-specific integrated circuit [ASIC]-based)
    • Unicast and multicast routing entries: 32,000
    • Support for 2048 active VLANs and 4096 VLAN IDs per switch
    • Layer 2 multicast addresses: 16,384
    • MAC addresses: 32,768
    • Policers: 512 ingress and 512 egress
    • ACL or quality-of-service (QoS) entries: 32,000
    • Uplinks: 4 alternatively wired SFP ports with (Gigabit EtherChannel) support
    • Latency: 6 microseconds for 64-byte packets
    • Switched virtual interfaces (SVIs): 2048
    • STP instances: 1500
    • Internet Group Management Protocol (IGMP) snooping entries: 8000
  • Layer 2 Features
    • Layer 2 hardware forwarding at 72 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
    • Per-VLAN Spanning Tree Protocol (PVST+) and Per-VLAN Rapid Spanning Tree Protocol (PVRST)
    • Spanning-tree PortFast and PortFast guard
    • Spanning-tree UplinkFast and BackboneFast
    • 802.1s
    • 802.1w
    • Spanning-tree root guard
    • Cisco Discovery Protocol
    • IGMP snooping v1, v2, and v3
    • 802.3ad
    • Cisco EtherChannel technology, Cisco Fast EtherChannel technology, and Cisco Gigabit EtherChannel technology support
    • Port Aggregation Protocol (PAgP)
    • Unidirectional Link Detection Protocol (UDLD) and aggressive UDLD on the SFP ports
    • Q-in-Q in hardware
    • Layer 2 protocol tunneling
    • Jumbo frames on all ports (up to 9216 bytes)
    • Baby giants (up to 1600 bytes)
    • Hardware-based storm control (formally known as broadcast and multicast suppression)
    • Community private VLANs (PVLANs)
    • Forced 10/100 autonegotiation
  • Layer 3 Features
    • Hardware-based IP Cisco Express Forwarding routing at 72 Mpps
    • Static IP routing
    • IP routing protocols: EIGRP, OSPF, RIP, RIP2
    • BGPv4 and Multicast Border Gateway Protocol (MBGP)
    • Hot Standby Router Protocol (HSRP)
    • Software routing of IPX and AppleTalk
    • IS-IS routing protocol
    • IGMPv1, v2, and v3
    • IGMP filtering on access and trunk ports
    • IP Multicast routing protocols (Protocol Independent Multicast [PIM], Source Specific Multicast [SSM], and Distance Vector Multicast Routing Protocol [DVMRP])
    • Pragmatic General Multicast (PGM)
    • Cisco Group Management Protocol (GMP) server
    • Full Internet Control Message Protocol (ICMP) support
    • ICMP Router Discovery Protocol
    • Policy-based routing (PBR)
    • Virtual Route Forwarding-lite (VRF-lite)
    • IPv6 software switching support
  • Sophisticated QoS and Traffic Management
    • Per-port QoS configuration
    • Support for four queues per port in hardware
    • Strict priority queuing
    • IP differentiated services code point (DSCP) and IP Precedence
    • Classification and marking based on IP type of service (ToS) or DSCP
    • Classification and marking based on full Layer 3 and Layer 4 headers (IP only)
    • Input and output policing based on Layer 3 and Layer 4 headers (IP only)
    • Support for 512 policers on ingress and 512 policers on egress configured as aggregate or individual
    • Shaping and sharing output queue management
    • Dynamic Buffer Limiting (DBL): Advanced congestion avoidance
    • No performance penalty for granular QoS functions
  • Predictable Performance
    • 96-Gbps switching fabric
    • Layer 2 hardware forwarding at 72 Mpps
    • Layer 3 hardware-based IP Cisco Express Forwarding routing at 72 Mpps
    • Layer 4 TCP or User Datagram Protocol (UDP) hardware-based filtering at 72 Mpps
    • No performance penalty with advanced Layer 3 and Layer 4 services enabled
    • Software-based learning at a sustained rate of 500 hosts per second
    • Support for 32,768 MAC addresses
    • Support for 32,000 entries in routing table (shared between unicast and multicast)
    • Support for 512 ingress policers and 512 egress policers
    • Support for 32,000 ACL and QoS entries
    • Scalability to 2048 virtual ports (VLAN port instances)
    • Scalability to 8000 IGMP snooping entries
    • Scalability to 1500 STP instances
    • Bandwidth aggregation up to 16 Gbps through Cisco Gigabit EtherChannel technology
    • Hardware-based wire-speed multicast management
    • Hardware-based wire-speed ACLs
  • Comprehensive Management
    • 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
    • Command-line interface (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)
    • Smartports macros
    • SPAN ACL filtering
    • Dynamic Host Configuration Protocol (DHCP) client autoconfiguration
    • IfIndex persistence
  • Advanced Security
    • TACACS+ and RADIUS, which 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, port security, voice VLAN, and guest VLAN extensions)
    • 802.1x accounting
    • Trusted boundary
    • Router ACLs (RACLs) on all ports (no performance penalty)
    • VLAN ACLs (VACLs)
    • Port ACLs (PACLs)
    • PVLANs on access and trunk ports
    • DHCP snooping and Option82 insertion
    • Port security
    • Sticky port security
    • SSHv1 and v2
    • VLAN Management Policy Server (VMPS) client
    • Unicast MAC filtering
    • Unicast port flood blocking
    • Dynamic Address Resolution Protocol (ARP) inspection
    • IP source guard
    • Community PVLAN
  • Traffic and Congestion Management
    • Number of queues: four queues per port
    • Type of buffers: Dynamic
  • Switch Architecture Specifications
    • Packet buffering: Dynamic, 16-MB shared memory
    • CPU speed: 266 MHz
    • Flash memory: 64 MB
    • Synchronous dynamic RAM (SDRAM): 256 MB
  • Management
    • CiscoWorks LAN Management Solutions (LMS), including CiscoWorks Resource Manager Essentials
    • Embedded CiscoView
    • SNMPv1, v2, and v3
    • RMON I and II
    • RFC 1213-MIB (MIB II)
    • UDP-MIB
    • TCP-MIB
    • RFC 2233 (IF-MIB)
    • RMON-MIB lite (RFC 1757)
    • RMON2-MIB lite (RFC 2021)
    • SMON-MIB
    • ENTITY-MIB (V1-RFC 2037) (V2- RFC 2737)
    • BRIDGE-MIB (RFC 1493)
    • IGMP-MIB
    • PIM-MIB
    • OSPF-MIB
    • BGP4-MIB
  • Industry Standards
    • Ethernet: IEEE 802.3 and 10BASE-T
    • Fast Ethernet: IEEE 802.3u and 100BASE-TX
    • 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 Link Aggregation Control Protocol (LACP)
    • IEEE 802.1p class-of-service (CoS) prioritization
    • IEEE 802.1Q VLAN
    • IEEE 802.1x user authentication
    • 1000BASE-X (SFP)
    • 1000BASE-SX
    • 1000BASE-LX/LH
    • 1000BASE-ZX
    • RMON I and II standards
  • Indicator and Port Specifications
    • Fan, PS1, PS2
    • Power supply status: Green (operational)/red (faulty)
    • System status: Green (operational)/red (faulty)
    • Console: RJ-45 female
    • SFP ports: Link
    • Image management port: 10/100BASE-TX (RJ-45 female) data terminal equipment (DTE); green (good)/orange (disabled)/off (not connected)
  • AC and DC Power Supply Specifications


300-Watt AC

300-Watt DC

Input current

4A @ 100V

2A @ 240V

8A @ -48 to -60V

Output current

25A @12 VDC

25A @ 12 VDC


Weight 2.0 kg

Weight 2.0 kg

  • Switch Dimensions
    • Width: 17.290 in. (43.9166 cm)
    • Depth: 16.14 in. (40.9956 cm)
    • Height 1.712 in. (4.445 cm)
    • Weight: 16.5 lb (7.48 kg)
  • Software Requirements
    • The Cisco Catalyst 4948 High-Performance Edge Switch is supported only in Cisco IOS Software and is not supported in the Cisco Catalyst OS Software. The minimum software versions are as follows:
    • Cisco Catalyst 4948 supported in Cisco IOS Software Release 12.2(20)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