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Overview of IBM Networking
SNA Switching Services
BC-232
Cisco IOS Bridging and IBM Networking Configuration Guide
78-11737-02
SNA Switching Services
Note SNA Switching Services functionality supersedes all functionality previously available in the APPN
feature in the Cisco IOS software. SNASw configuration will not accept the previous APPN
configuration commands. Previous APPN users should use this chapter to configure APPN
functionality using the new SNASw commands.
SNASw provides an easier way to design and implement networks with SNA routing requirements.
Previously, this network design was accomplished using APPN with full network node (NN) support in
the Cisco router. This type of support provided the SNA routing functionality needed, but was
inconsistent with the trends in Enterprise networks today. The corporate intranet is replacing the SNA
WAN. Enterprises are replacing their traditional SNA network with an IP infrastructure that supports
traffic from a variety of clients, using a variety of protocols, requiring access to applications on a variety
of platforms, including SNA applications on Enterprise servers.
While SNA routing is still required when multiple servers must be accessed, the number of nodes
required to perform this function is decreasing as the IP infrastructure grows and as the amount of native
SNA traffic in the network decreases.
SNASw enables an enterprise to develop their IP infrastructure, while meeting SNA routing
requirements.
The number of NNs in the network and the amount of broadcast traffic are reduced. Configuration is
simplified, and SNA data traffic can be transported within the IP infrastructure. The following features
provide this functionality:
• HPR Capable SNA Routing Services, page 234
• Branch Extender, page 234
• Enterprise Extender (HPR/IP), page 235
• Usability Features, page 236
• Management Enhancements, page 237
• LAN and IP-Focused Connection Types, page 238
Benefits of SNASw
SNASw provides the following benefits:
• Scalable APPN Networks, page 233
• IP Infrastructure Support, page 233
• Reduced Configuration Requirements, page 233
• Network Design Simplicity, page 233
• Improved Availability, page 233
• Increased Management Capabilities, page 233
• Architectural Compliance, page 233