Cisco 4948 Series - Manual (Page 3)

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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
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72 Mpps Layer 2 Forwarding (hardware)
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72 Mpps Layer 3 and 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
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Layer 2 hardware forwarding at 72 Mpps
•
Layer 2 switch ports and VLAN trunks
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IEEE 802. 1Q VLAN encapsulation
•
Inter-Switch Link (ISL) VLAN encapsulation
•
Dynamic Trunking Protocol (DTP)
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VLAN Trunking Protocol (VTP) and VTP domains
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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
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802.1w
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Spanning-tree root guard
•
Cisco Discovery Protocol
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IGMP snooping v1, v2, and v3
•
802.3ad
•
Cisco EtherChannel ® technology, Cisco Fast EtherChannel technology, and Cisco Gigabit EtherChannel technology support