Benefits of Enterprise Extender

EE provides the following benefits:

SNA transport over a native IP network with no changes required to SNA applications
SNA application connectivity using an IP backbone that supports preservation of SNA transmission priority
When used with an extended border node, EE provides a mechanism to replace SNA Network Interconnection (SNI) function in a way that does not require SNA legacy hardware, such as the 3745. See Using EE and extended border node (EBN) as a replacement for SNI for more information.
SNA traffic can use OSA-E Gigabit and OSA-E 10 Gigabit Ethernet (EE can use any z/OS-supported IP network connection)
Support for IPv4 and IPv6 addressing models
End-to-end failure protection and data prioritization
Compatibility with IPsec and SNA session-level encryption

Requirement: EE is valid only for APPN configurations and is an extension of APPN and high performance routing (HPR) protocols. Your subarea network must be migrated to APPN for the subareas where EE is to be deployed. For more information about APPN, see VTAM networking concepts and Connecting an APPN node to VTAM. Also see Migrating Subarea Networks to an IP Infrastructure SG24-5957-00.