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Overview of IBM Networking
Figure 107
Figure 107
CS/390
CS/390
Enterprise Extender (HPR/IP)
SNASw also supports the EE function. EE offers SNA HPR support directly over IP networks. EE also
uses connectionless User Datagram Protocol (UDP) transport. SNA COS and transmission priority are
maintained by mapping the transmission priority to the IP precedence and by mapping transmission
priority to separate UDP port numbers, allowing the IP network to be configured based on these
elements. The Cisco IP prioritization technologies, such as weighted fair queueing (WFQ), prioritize the
traffic through the IP network. EE support on the IBM Communications Server for S/390 allows users
to build highly reliable SNA routed networks that run natively over an IP infrastructure directly to the
Enterprise servers. These network designs reduce points of failure in the network and provide reliable
SNA networks.
Figure 108
Figure 108
CS/390
HPR EN
CS/390
HPR
78-11737-02
illustrates the BEX functionality.
BEX Functionality
Emulated
EN
EN
Cisco CIP
NN
illustrates the EE functionality.
EE Functionality
IP over channel
Downstream
Emulated
NN
SNASw
Downstream
HPR SNA
switch
IP
SNA/HPR
directly over
IP/UDP
Cisco IOS Bridging and IBM Networking Configuration Guide
Enterprise Extender (HPR/IP)
devices
PU 2.0
EN
LEN
devices
PU 2.0
EN
LEN
BC-235
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