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Cisco Catalyst 2950 Series Switches

Catalyst 2950 Series Software Feature Comparison--SI and EI

Product Bulletin No. 1855

Cisco Catalyst 2950 Series
Software Feature Comparison—Standard Image (SI)
and Enhanced Image (EI) Feature Comparison

The Cisco Catalyst® 2950 Series switches include two software image versions that support different degrees of functionality—the Standard Image (SI) and the Enhanced Image (EI) Software. The version of software depends solely on the model of switch selected, with no upgrade capabilities.

The SI version is embedded in Cisco Catalyst 2950-12, 2950-24, and 2950SX-24 switches, and supports basic Cisco IOS® functionality, Fast Ethernet connectivity, and cluster management.

The EI version supports all that and more. The EI version of software is embedded in Cisco Catalyst 2950T-24, 2950C-24, and 2950G-12, 2950G-24, 2950G-48 switches, and supports advanced intelligent services, gigabit connectivity, and a richer set of features. These include Cisco Spanning-Tree Protocol enhancements for high availability, access control parameters (ACPs) for enhanced security, and Differentiated Services Code Point (DCSP) and rate limiting for advanced quality of service.

The following tables highlight feature comparisons between the fixed-configuration Cisco Catalyst 2950 Series switches with the SI or EI software, and the fixed-configuration Catalyst 2900 Series XL (fixed-configuration Catalyst 2900 XL switches have been discontinued, modular configurations still available).


Table 1: Catalyst 2950 Series Switches
Product Software Image
Catalyst 2950-12

Standard Image (SI)

Catalyst 2950-24

Standard Image (SI)

Catalyst 2950SX-24

Standard Image (SI)

Catalyst 2950T-24

Enhanced Image (EI)

Catalyst 2950C-24

Enhanced Image (EI)

Catalyst 2950G-12-EI

Enhanced Image (EI)

Catalyst 2950G-24-EI

Enhanced Image (EI)

Catalyst 2950G-24-EI-DC

Enhanced Image (EI)

Catalyst 2950G-48-EI

Enhanced Image (EI)




Table 2: Feature Comparison of Catalyst 2900 XL, Catalyst 2950 EI, and Catalyst 2950 SI Switches
Feature Fixed-Configuration Catalyst 2900 XL Catalyst 2950 EI Catalyst 2950 SI
VLANs supported

64

250

64

4096 VLAN Ids

No

Yes

No

Number of STP Instances

64

64

64

64 bit counters on Gig ports

No

Yes

N/A

CWGM GBIC support

No

Yes

N/A

Trunking
ISL Trunking

Yes

No

No

802.1Q

Yes

Yes

Yes

802.1Q Tunneling

No

No

No

VTP Server, Client, Transparent Mode

Yes

Yes

Yes

User configurable management VLAN

Yes

Yes

Yes

Security

Static Access Ports

Yes

Yes

Yes

Port Security

Yes

Yes

Yes

Port Security MAC Aging

No

Yes

Yes

Private VLAN Edge
(Protected Port)

Yes

Yes

Yes

802.1x

No

Yes

Yes

ACEs/ACPs (Layer 2-4 IP Security Filtering)

No

Yes

No

Port based ACLS (PACL)

No

Yes

No

TACACS+

Yes

Yes

Yes

RADIUS

No

Yes

Yes

BPDU Guard

No

Yes

Yes

STRG

Yes

Yes

Yes

Quality of Service

Number of Queues

2

4

4

802.1p Priority

Yes

Yes

Yes

Strict Priority Scheduling

Yes

Yes

Yes

Weighted Round Robin

No

Yes

Yes

Weighted Round Robin Detect

No

Yes

No

Intelligent Ethernet (Policing/Metering, Marking, Classification, Queuing & Scheduling)

No

Yes

No

Unicast/Multicast/Broadcast Storm Control

Yes

Yes

Yes

DHCP Option 82

No

No

No

DSCP Mapping

No

Yes

No

IP Multicast

CGMP

Yes

No

No

IGMP Snooping

No

Yes

Yes

IGMP Filtering

No

Yes

Yes

MVR (Multicast VLAN Registration)

Yes

Yes

Yes

NTP

Yes

Yes

Yes

Link Aggregation

CNS Agent Support (IE 2100)

No

Yes

No

Clustering

Yes

Yes

Yes

Fast EtherChannel

Yes

Yes

Yes

Gigabit EtherChannel

Yes (limited to Catalyst 2900M XL)

Yes

Yes (only supported on Catalyst 2950SX-24)

Rapid Spanning Tree (802.1w)

No

Yes

No

Multiple Spanning Tree (802.1s)

No

Yes

No

PAgP

No

Yes

Yes

DTP

No

Yes

Yes

VTP Pruning

Yes

Yes

Yes

Filtering & Throttling

No

Yes

Yes

SPAN

Yes

Yes

Yes

Mini-jumbo Frame Support

Yes

Yes (Catalyst 2950G switches only)

No

Static and Dynamic MAC Addressing

Yes

Yes

Yes

Dynamic Access Ports

Yes

Yes

Yes

CDP v2

Yes

Yes

Yes

UDLD

Yes

Yes

Yes

Protected Port (PVLAN Edge)

Yes

Yes

Yes

Port duplex/speed

Yes

Yes

Yes

Port Flow Control

Yes

Yes

Yes

SysLog

Yes

Yes

Yes

HTTP Enhancements

Yes

Yes

Yes

MAC Addresses

2000

8000

8000

IP Host connectivity equivalent to 2900XL/3500XL such as telnet, DHCP, BootP Client, DNS

Yes

Yes

Yes

Spanning-Tree Protocol

CrossStack UplinkFast

Yes (limited to 2900M XL)

Yes

N/A

PortFast

Yes

Yes

Yes

UplinkFast

Yes

Yes

Yes

BackboneFast

No

Yes

Yes

VLANs

Voice VLAN

Yes

Yes

Yes

Per port enabling/disabling of unknown unicast/multicast flooding

Yes

No

No

Multi-VLAN ports

Yes

No

No

Network (Drain) Port

Yes

No

No