Cisco Catalyst 4948 10 Gigabit Ethernet Managed L3 Switch - 48 Ethernet Ports (WS-C4948-10GE-S)
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Cisco Catalyst 4948 10 Gigabit Ethernet Managed L3 Switch - 48 Ethernet Ports (WS-C4948-10GE-S)

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The Cisco Catalyst® 4948 10 Gigabit Ethernet 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 10 Gigabit Ethernet Switch offers exceptional performance, bandwidth, 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 10 Gigabit Ethernet Switch 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.

Features and Benefits

  • Wire-Speed Performance in All Directions

The Cisco Catalyst 4948 10 Gigabit Ethernet Switch delivers wire-speed throughput with low latency for data-intensive applications using a 136-Gbps switching fabric with a forwarding rate of 102 million packets per second (mpps) in hardware for Layer 2 to 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 enables increased scalability and performance. X2 10 Gigabit Ethernet optics provide 20 Gigabit Ethernet wire-speed uplinks for outstanding throughput of traffic.

  • Power-Supply Redundancy for Nonstop Operation

The Cisco Catalyst 4948 10 Gigabit Ethernet Switch 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 10 Gigabit Ethernet Switch also has a hot-swappable fan tray with four redundant fans for additional serviceability and availability.

  • Comprehensive Management

The Cisco Catalyst 4948 10 Gigabit Ethernet Switch 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 10 Gigabit Ethernet Switch to reload a new image from a TFTP server within seconds.

The Cisco Catalyst 4948 10 Gigabit Ethernet Switch 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 10 Gigabit Ethernet Switch 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.

Feature Comparison

Table 1 compares the features of the Cisco Catalyst 4948 Switch, Catalyst 4948 10 Gigabit Ethernet Switch, and Catalyst 4900M Switch.

Table 1.       Cisco Catalyst 4900 Series Switches Model Comparison

Feature and Description

Cisco® Catalyst 4948

Cisco Catalyst 4948 10 Gigabit Ethernet

Cisco Catalyst 4900M

Switching Capacity

96 Gbps

136 Gbps

320 Gbps

Throughput

72 mpps

102 mpps

  250 mpps for IPv4
  125 mpps for IPv6

IPv6 Support

In Software

In Software

In Hardware

Height

1RU

1RU

2RU

Modular Half-Card Slots

0

0

2

Maximum 10/100/1000 Ports

48

48

40

Maximum 10 Gigabit Ethernet Ports

0

2

24

Maximum Gigabit Ethernet (fiber) Ports

4

0

32 (Cisco TwinGig Converter Module)

Cisco TwinGig Converter Module Support

No

No

Yes (half-cards only)

Uplink Optic Type

4 Small Form-Factor Pluggable (SFP) optics

2 X2 (10 Gigabit Ethernet) optics

8 X2 (10 Gigabit Ethernet) optics

Multilayer Switching

IP Base and Enterprise Services options

IP Base and Enterprise Services options

IP Base and Enterprise Services options

Shared Buffer

16 MB

16 MB

16 MB

CPU

266 MHz

666 MHz

1.3 GHz

Synchronous Dynamic RAM (SDRAM)

256 MB

256 MB

512 MB

Active VLANs

4096

4096

4096

Multicast Entries

  28,000 (Layer 3)
  16,000 (Layer 2)
  28,000 (Layer 3)
  16,000 (Layer 2)
  56,000 for IPv4
  28,000 for IPv6

Per-VLAN Spanning Tree (PVST) and VLAN IDs

4096

4096

4096

Spanning Tree Protocol Instances

10000

10000

10000

Switched Virtual Interfaces (SVIs)

2000

2000

4000

Security and QoS Hardware Entries

32,000

32,000

128,000

MAC Addresses

32,000

55,000

55,000

Switched Port Analyzer (SPAN)

2 ingress and 4 egress

2 ingress and 4 egress

8 ingress and 8 egress

USB port

No

No

Yes

Compact Flash Memory Support

No

No

Yes

System Reset Button

No

No

Yes

Minimum Software Requirement

Cisco IOS® Software Release 12.2(20)EWA or later

Cisco IOS Software Release 12.2(25)EWA or later

Cisco IOS Software Release 12.2(40)XO or later

Predictable Performance and Scalability

The Cisco Catalyst 4948 10 Gigabit Ethernet Switch 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 10 Gigabit Ethernet Switch offers superior per-port 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 10 Gigabit Ethernet Switch can classify, police, and mark incoming packets, allowing the administrator to differentiate between traffic flows and enforce policies. Sharing, shaping, and strict-priority configurations determine scheduling of egress traffic. The Catalyst 4948 10 Gigabit Ethernet Switch also supports Dynamic Buffer Limiting (DBL), a congestion-avoidance feature. For details about the QoS features (including DBL) on the Cisco Catalyst 4948 10 Gigabit Ethernet Switch, refer to the Cisco Catalyst 4500 Series supervisor engine QoS overview at http://www.cisco.com/en/US/products/hw/switches/ps4324/prod_white_papers_list.html.

Features and Specifications 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 4096 VLANs per switch

   PVST and PVST+

   Flexlink

   Spanning Tree PortFast and PortFast Guard

   Spanning Tree UplinkFast and BackboneFast

   IEEE 802.1s

   IEEE 802.1w

   IEEE 802.3ad

   Spanning Tree Root Guard

   Cisco Discovery Protocol Versions 1 and 2

   IGMPv1, v2, and v3 snooping

   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

   IEEE 802.1 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)

   Community private VLANs (PVLANs)

   Forced 10/100 autonegotiation

   Web Content Communication Protocol (WCCP) Version 2 Layer 2 redirect

   Private VLAN promiscuous trunk

   Layer 2 promiscuous trunk over trunk port (L2PT)

   Class-of-service (CoS) mutation

   E-OAM 802.3ah and CFM: 802.1ag

Layer 3 Features

   Jumbo frames on all ports (up to 9216 bytes)

   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 (NSF) awareness

   Hot Standby Router Protocol (HSRP) v1 and v2

   Software routing of Internetwork Packet Exchange (IPX) and AppleTalk

   IS-IS routing protocol

   IGMPv1, v2, and v3

   IGMP filtering on access and trunk ports

   IP Multicast routing protocols: PIM, SSM, and Distance Vector Multicast Routing Protocol (DVMRP)

   Auto rendezvous point (Auto-RP)

   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)

   VRF-aware IP services

   IPv6 (software switched)

   OSPF fast convergence

   OSPF and EIGRP fast-convergence protection

   EIGRP stub

   Virtual Router Redundancy Protocol (VRRP)

   IP unnumbered for SVI

   NSF (Non-Stop Forwarding) Awareness

   WCCPv2 (Web Cache Communications Protocol)

   Gateway Load Balancing Protocol (GLBP)

High-Availability Features

   1+1 hot swappable AC or DC power supplies

   Hot-swappable field-replaceable fan tray with redundant fans

   HSRP v1 and v2

   VRRP

   Cisco IOS Embedded Event Manager (EEM)

   Cisco Generic Online Diagnostics (GOLD)

   Smart Call Home

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 4 headers

   Input and output policing based on Layer 3 and 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

   Match class of service (CoS) for non-IPv4 traffic

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 and User Datagram Protocol (UDP) hardware-based filtering at 102 mpps

   No performance penalty with advanced Layer 3 and 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 ( SVIs )

   Bandwidth aggregation up to 40 Gbps using Cisco Gigabit Ethernet EtherChannel technology

   Hardware-based multicast management

   Hardware-based access control lists (ACLs), router ACLs (RACLs), and VLAN ACLs (VACLs)

Comprehensive management

   Manageable through Cisco Network Assistant (CNA)

   Single console port and single IP address to manage all system features

   Software configuration management, including local and remote storage

   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)

   Cisco SmartPort macros

   SPAN ACL filtering

   Dynamic Host Configuration Protocol (DHCP) client autoconfiguration

   Enhanced SNMP MIB support

   HTTPS

   Time Domain Reflectometry (TDR)

   MAC address notification

   Onboard failure logging (OBFL)

   Network Mobility Service Protocol (NMSP)

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

   IEEE 802. 1x user authentication (with VLAN assignment, voice VLAN, port security, guest VLAN, private guest VLAN, private VLAN, and RADIUS-supplied session timeout extensions)

   IEEE 802.1x accounting

   IEEE 802. 1x authentication failure

   IEEE 802. 1x private VLAN assignment

   IEEE 802. 1x private guest VLAN

   IEEE 802. 1x RADIUS-supplied timeout

   IEEE 802.1x Mac-Auth-Bypass

   IEEE 802.1x inaccessible authentication bypass

   Cisco Network Admission Control (NAC) Layer 2 IEEE 802.1x

   Cisco NAC Layer 2 IP

   Cisco NAC Layer 2 IP inaccessible authentication bypass

   Trusted boundary

   RACLs on all ports (no performance penalty)

   VACLs

   Port ACLs (PACLs)

   Private VLANs (PVLANs) on access and trunk ports

   VTPv3

   DHCP snooping

   DHCP Option 82

   DHCP Option 82 insertion

   DHCP Option 82 pass-through

   Port security

   Port security for PVLAN ports

   Sticky port security

   Secure Shell (SSH) Protocol Versions 1 and 2

   VLAN Management Policy Server (VMPS) client

   Unicast MAC filtering

   Unicast port flood blocking

   Dynamic Address Resolution Protocol (ARP) inspection

   IP Source Guard

   Community PVLANs

   Trunk port security

   IEEE 802.1x inaccessible authentication bypass

   MAC authentication bypass

   Control plane policing

   IEEE 802.1x unidirectional controlled port

   Voice VLAN sticky port security

   Secure Copy Protocol (SCP)

 &

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