Overview of IBM Networking
Enterprise Extender (HPR/IP)
Figure 107 BX Functionality
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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. Cisco’s 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 illustrates the EX functionality.
Figure 108 EX Functionality
CS/390
HPR EN
HPR SNA
switch
IP over channel
CS/390
HPR
IP
SNA/HPR directly over
IP/UDP
Downstream
devices
PU 2.0
EN
LEN
26187
Cisco IOS Bridging and IBM Networking Configuration Guide
