Cisco 2950-12 - Catalyst Switch Abmessungen
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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
supportsadvancedintelligentservices,gigabitconnectivity, 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
Catalyst2950Seriesswitcheswiththe SI or EI software,andthefixed-configurationCatalyst
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)
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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 244
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
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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
Table 2 Feature Comparison of Catalyst 2900 XL, Catalyst 2950 EI, and Catalyst 2950 SI Switches (Continued)
Feature Fixed-Configuration
Catalyst 2900 XL Catalyst 2950 EI Catalyst 2950 SI
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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
Table 2 Feature Comparison of Catalyst 2900 XL, Catalyst 2950 EI, and Catalyst 2950 SI Switches (Continued)
Feature Fixed-Configuration
Catalyst 2900 XL Catalyst 2950 EI Catalyst 2950 SI
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