А Вы зачем надумали IOS менять?
Чем то не устраивал старый?
Или просто экспириенс повысить...
Что то я не понимаю...
Идем на http://tools.cisco.com/ITDIT/CFN/jsp/index.jsp
Compare Releases: Quickly Compare between two Cisco IOS releases.
Compare Images <--- Кликаем сюда.
Сравниваем:
* First Image Information *
Image Name (Dram/Flash) c3550-i5q3l2-mz.12.1-13.EA1a (64/16)
Features Unique to First
Ability to limit console and telnet login attempts
Clear Counters Per Port
ErrDisable timeout
EtherChannel
Fast EtherChannel (FEC)
Flexible PAgP
IEEE 802.1Q VLAN Trunking
IEEE 802.3ad Link Aggregation (LACP)
Interface Range Specification
Spanning Tree Protocol (STP) - Backbone Fast Convergence
Spanning Tree Protocol (STP) - Loop Guard
Spanning Tree Protocol (STP) - Portfast
Spanning Tree Protocol (STP) - Portfast BPDU Guard
Spanning Tree Protocol (STP) - Root Guard
Spanning Tree Protocol (STP) - Uplink Fast Convergence
Spanning Tree Protocol (STP) - Uplink Load Balancing
Standby Supervisor Port Usage
Switch Port Analyzer (SPAN)
* Second Image Information *
Image Name (Dram/Flash) c3550-i5q3l2-mz.12.1-19.EA1c (64/16)
Image Features Unique to Second Image
DHCP Client
DHCP Snooping
IGMP Fast Leave
IGMP Snooping
* Common Features in Both Images Address Resolution Protocol (ARP) *
AutoQoS - VoIP
BGP
BGP 4
BGP 4 Multipath Support
BGP 4 Prefix Filter and In-bound Route Maps
BGP 4 Soft Config
BGP Soft Reset
CEF/dCEF - Cisco Express Forwarding
CGMP - Cisco Group Management Protocol
Cisco Discovery Protocol (CDP)
CLI String Search
Commented IP Access List Entries
DHCP Server
Enhanced IGRP (EIGRP)
Enhanced IGRP Stub Routing
Enhanced Password Security
Fast-Switched Policy Routing
HSRP - Hot Standby Router Protocol
HTTP Security
IEEE 802.1s VLAN Multiple Spanning Trees
IEEE 802.1W Spanning Tree Rapid Reconfiguration
IEEE 802.1x with Port Security
IGMP Version 1
IGMP Version 2
IGRP
IP Enhanced IGRP Route Authentication
IP Multicast Load Splitting across Equal-Cost Paths
IP Named Access Control List
IP Routing
IP SLAs DHCP Operation
IP SLAs Distribution of Statistics
IP SLAs DLSw+ Operation
IP SLAs DNS Operation
IP SLAs HTTP Operation
IP SLAs ICMP Echo Operation
IP SLAs ICMP Path Echo Operation
IP SLAs Reaction Threshold
IP SLAs Scheduling
IP SLAs TCP Connect Operation
IP SLAs UDP Echo Operation
IP SLAs UDP Jitter Operation
IP Summary Address for RIPv2
ISL VLAN
Multicast BGP (MBGP)
Multicast Source Discovery Protocol (MSDP)
Network Time Protocol (NTP)
Parse Bookmarks
PIM Multicast Scalability
PIM Version 1
PIM Version 2
Policy-Based Routing (PBR)
RADIUS
Reduced Mac Address Usage
Remote SPAN (RSPAN)
RIP
RMON events and alarms
RTP Header Compression
SNMP (Simple Network Management Protocol)
SNMP Version 3
SNMPv2C
Spanning Tree Protocol (STP)
Spanning Tree Protocol (STP) Extension
Standard IP Access List Logging
Stub IP Multicast Routing
Support for 4096 VLAN IDs
Tacacs SENDAUTH function
Tacacs Single Connection
TACACS+
Time-Based Access Lists Using Time Ranges
VLAN Assignment with IEEE 802.1x