Cisco Systems 4948 Series Technical Specifications, Performance and Switching Specifications

Page 3

Table 1. Descriptions of Software Configuration Options for Cisco Catalyst 4948

Software Image

Description

 

 

IP Base Image

Standard Layer 3 image, including Routing Information Protocol Version 1 (RIPv1), RIPv2, static routes,

 

EIGRP stub.

 

 

Enterprise Services 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), Appletalk, and

 

Internetwork Packet Exchange (IPX). Also includes all IP Base Image features.

 

 

TECHNICAL SPECIFICATIONS

Performance and Switching Specifications

∙96 Gbps nonblocking switch fabric

∙72 Mpps Layer 2 Forwarding (hardware)

∙ 72 Mpps Layer 3 and 4 forwarding—IP routing, Cisco E xpress 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

© 2006 Cisco Systems, Inc. All rights reserved.

Important notices, privacy statements, and trademarks of Cisco Systems, Inc. can be found on cisco.com.

Page 3 of 16

Page 2 Page 4
Image 3
Page 2 Page 4
Contents Data Sheet High-Performance, Rack-Optimized Server SwitchingKEY Features and Benefits Wire-Speed Performance for 10/1 00/1 000 ConnectivityComprehensive Management Power Supply Redundancy for Nonstop OperationSoftware Configuration Options Robust SecurityLayer 2 Features Technical SpecificationsPerformance and Switching Specifications ∙ ACL or quality-of-service QoS entries 32,000Sophisticated QoS and Traffic Management Layer 3 Features∙ Https Predictable Performance∙ Type of buffers Dynamic Switch Architecture SpecificationsAdvanced Security Traffic and Congestion ManagementManagement Industry Standards Supported SFPs Indicator and Port SpecificationsPower Supply Specifications ∙ SFP ports LinkRegulatory Standards Compliance Switch DimensionsSoftware Requirements Environmental ConditionsNetwork Equipment Building Standards Nebs EMCSFP Options Power Cable OptionsOrdering Information for Cisco Catalyst Product Number DescriptionWarranty Technical Support Services-ComponentsService Feature Overview Benefit or Advantage ∙ United States and Canada 800 553-NETS Technical Support Services-Competitive DifferentiatorsFeature Benefit or Advantage For More InformationUSA
Top Page Image Contents