Which IOS will change a 3550 SMI into an EMI ?

[JASTO]

http://www.cisco.com/en/US/docs/switches/lan/catalyst3560/software/release/12.2_37_se/configuration/guide/3560SCG.pdf

http://www.cisco.com/en/US/docs/switches/lan/catalyst3560/software/release/12.2_37_se/configuration/guide/3560SCG.pdf

The Catalyst 3560 switch is supported by either the IP base image,
formerly known as the standard
multilayer image (SMI), or the IP services image, formerly known as
the enhanced multilayer image
(EMI). The IP base image provides Layer 2+ features including access
control lists (ACLs), quality of
service (QoS), static routing, and the Routing Information Protocol
(RIP). The IP services image
provides a richer set of enterprise-class features. It includes Layer
2+ features and full Layer 3 routing
(IP unicast routing, IP multicast routing, and fallback bridging). To
distinguish it from the Layer 2+
static routing and RIP, the IP services image includes protocols such
as the Enhanced Interior Gateway
Routing Protocol (EIGRP) and Open Shortest Path First (OSPF) Protocol.