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Product Description

96 Gbps, 72 mpps, 1RU, L2/L3, 48 x 10/100/1000, 4 x SFP, 266 MHz, 4096 VLANs, 7.48 kg

The Cisco Catalyst® 4948 Switch is a wire-speed, low-latency, Layer 2 to 4, 1-rack-unit (1RU), fixed-configuration switch for rack-optimized server switching. Based on the proven Cisco® Catalyst 4500 Series hardware and software architecture, the Cisco Catalyst 4948 offers exceptional performance and reliability for low-density, multilayer aggregation of high-performance servers and workstations. High performance and scalability of intelligent network services is made possible with dedicated specialized resources known as ternary content addressable memory (TCAM). Ample TCAM resources (64,000 entries) enable high feature capacity, providing wire-speed routing and switching performance with concurrent provisioning of services such as quality of service (QoS) and security, and helping ensure scalability for today's network requirements with ample room for future growth.

The Cisco Catalyst 4948 offers 48 ports of wire-speed 10/100/1000BASE-T with four alternative wired ports that can accommodate optional 1000BASE-X Small Form-Factor Pluggable (SFP) optics.[1] 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

Features and Benefits

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 forwarding rate of 72 million packets per second (mpps) in hardware for Layer 2 to 4 traffic. Switching performance remains high regardless of the number of route entries or Layer 3 and 4 services enabled. Hardware-based Cisco Express Forwarding routing architecture enables increased scalability and performance.

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 outstanding deployment flexibility. The Cisco Catalyst 4948 also has a hot-swappable fan tray with four redundant fans for additional serviceability and availability.

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 forwarding rate of 72 million packets per second (mpps) in hardware for Layer 2 to 4 traffic. Switching performance remains high regardless of the number of route entries or Layer 3 and 4 services enabled. Hardware-based Cisco Express Forwarding routing architecture enables increased scalability and performance.

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 outstanding deployment flexibility. The Cisco Catalyst 4948 also has a hot-swappable fan tray with four redundant fans for additional serviceability and availability.

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 the Simple Network Management Protocol (SNMP), Telnet client, Bootstrap Protocol (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 CiscoWorks 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.

Features and Specifications at a Glance

Performance and Switching


- 96 Gbps nonblocking switch fabric
- 72 mpps Layer 2 forwarding (hardware)
- 72 mpps Layer 3 and 4 forwarding: IP routing and Cisco Express Forwarding (hardware)
- Layer 2 to 4 hardware-based switch engine (application-specific integrated circuit [ASIC]-based)
- Unicast and multicast routing entries: 32,000
- Support for 4096 active VLANs and 4096 VLAN IDs per switch
- Layer 2 multicast addresses: 16,384
- MAC addresses: 32,768
- Policers: 512 ingress and 512 egress
- Access control list (ACL) and QoS entries: 32,000
- Uplinks: 4 alternatively wired SFP ports with Cisco Gigabit EtherChannel support
- Latency: 6 microseconds for 64-byte packets
- SVIs: 2048
- Spanning Tree Protocol instances: 1500
- Internet Group Management Protocol (IGMP) snooping entries: 16,000

Power Supply

The Cisco Catalyst 4948 offers a choice of 300W 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

New Cisco IOS Software Packaging for the Cisco Catalyst 4900 Series

Cisco provides a new Cisco IOS Software package for the Cisco Catalyst 4900 Series, creating a new foundation for features and functions and offering consistency across all Cisco Catalyst switches. The new Cisco IOS Software release is designated Release 12.2SG.

The Cisco IOS Software images for the Cisco Catalyst 4900 Series, formerly known as Basic Layer 3 (Standard Multilayer Image [SMI]) and Enhanced Layer 3 (Enhanced Multilayer Image [EMI]) images, are now called the IP Base and Enterprise Services images, respectively. Unless otherwise specified, all currently shipping Cisco Catalyst 4900 Series software features based on Cisco IOS Software are supported in the IP Base image; however, note the following points regarding the IP Base image:

- The IP Base image does not support the following routing-related features: BGP, EIGRP, OSPF, IS-IS, IPX, AppleTalk, VRF-lite, and PBR).

- The IP Base image supports the EIGRP stub for Layer 3 routing on all Cisco Catalyst 4900 Series supervisor engines.


Management features
ARP inspection Yes
Web-based management Yes
Quality of Service (QoS) support Yes
Switch layer L2/L3
Switch type Managed
Ports & interfaces
Console port RJ-45
Combo SFP ports quantity 4
Basic switching RJ-45 Ethernet ports type Gigabit Ethernet (10/100/1000)
Basic switching RJ-45 Ethernet ports quantity 48
Network
Number of VLANs 4096
Virtual LAN features Private VLAN
VLAN support Yes
Link aggregation Yes
Broadcast storm control Yes
Spanning tree protocol Yes
Full duplex Yes
Networking standards IEEE 802.1D, IEEE 802.1Q, IEEE 802.1p, IEEE 802.1s, IEEE 802.1w, IEEE 802.1x, IEEE 802.3, IEEE 802.3ab, IEEE 802.3ad, IEEE 802.3u, IEEE 802.3z
Data transmission
Packet buffer memory 16 MB
Jumbo frames 9216
Jumbo frames support Yes
Number of queues 4
Throughput 72 Mpps
Switching capacity 96 Gbit/s
MAC address table 32768 entries
Security
Security algorithms 802.1x RADIUS, SSH, SSH-2
SSH/SSL support Yes
IGMP snooping Yes
Access Control List (ACL) Yes
DHCP features DHCP client
Multicast features
Multicast support Yes
Protocols
Management protocols SNMPv1, v2, v3, EOT, SLA, LMS
Design
Electromagnetic compatibility FCC, ICES-003, EN55022, CISPR22, AS/NZS 3548, VCCI, EN55024, ETS300 386, EN50082-1, EN61000-3-2, EN61000-3-3
Safety UL 60950-1, CAN/CSA-C22.2 No. 60950-1, EN 60950-1, IEC 60950-1 IEC 60950-1, AS/NZS 60950, IEC 60825-1, IEC 60825-2
LED indicators Yes
Product colour Black
Form factor 1U
Rack mounting Yes
General
Product family Catalyst
Performance
Flash memory 6 MB
Internal memory 256 MB
Processor frequency 266 MHz
Built-in processor Yes
Power
Power consumption (typical) 300 W
AC input frequency 50 - 60 Hz
AC input voltage 100 - 240 V
Power supply included Yes
Power over Ethernet (PoE)
Power over Ethernet (PoE) No
Operational conditions
Operating altitude -60 - 2000 m
Operating relative humidity (H-H) 10 - 90%
Storage temperature (T-T) -40 - 75 °C
Operating temperature (T-T) 0 - 40 °C
Weight & dimensions
Weight 2 kg
Height 44.5 mm
Depth 401 mm
Width 439 mm