Hi Dhirendra,
The differences between the two are:
* The SMI image is essentially an L2-only image. However, Cisco IOS Software Release 12.1(8)EA1b includes enhancements to the L2 feature set. This release and later SMI releases use the term "Layer2+". Cisco IOS Software Release 12.1(11)EA1 adds basic L3 functionality to the SMI image. This L3 functionality includes static unicast routing, the Routing Information Protocol (RIP), and other features. This release and later SMI releases use the phrase "basic Layer 3 routing features".
* The EMI image is an L2 image in combination with a full L3 feature set. This feature set includes:
o Interior Gateway Routing Protocol (IGRP) and Enhanced IGRP (EIGRP)
o Open Shortest Path First (OSPF) Protocol
o Border Gateway Protocol Version 4 (BGP4)
o Hot Standby Router Protocol (HSRP)
o Protocol Independent Multicast (PIM)
o Other advanced services
P.S : Please mark this thread as answered if you feel your query is resolved. Do rate helpful posts.
With Regards,
Aravind K.J
