Datasheet

Data Sheet
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Feature and Description Cisco Catalyst 4948 Cisco Catalyst 4948 -10GE Cisco Catalyst 4900M
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 Types 4 SFP optics Two X2 (10 Gigabit Ethernet)
optics
Eight 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 28K (Layer 3)
16K (Layer 2)
28K (Layer 3)
16K (Layer 2)
70K for IPv4
35K for IPv6
Per VLAN Spanning Tree
(PVST) Protocol and
VLAN IDs
4096 4096 4096
Spanning Tree Protocol
instances
1500 1500 3000
Switched Virtual Interfaces
(SVIs)
2000 2000 4096
Security and Quality-of-
Service (QoS) Hardware
Entries
32K 32K 128K
MAC Addresses 32K 55K 55K
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(46)SG or
later
Features at a Glance
Layer 2 Features
●
Layer 2 switch ports and VLAN trunks
●
IEEE 802. 1Q VLAN encapsulation
●
Dynamic Trunking Protocol (DTP)
●
VLAN Trunking Protocol (VTP) and VTP domains
●
VTP pruning
●
VTPv3
●
Port security on trunk port
●
Q-in-Q passthrough
●
Support for 4096 VLANs per switch
●
PVST+ and Per-VLAN Rapid Spanning-Tree Protocol (PVRST)