IBM BC-201 manual Enterprise Extender HPR/IP, BC-235

Overview of IBM Networking

Enterprise Extender (HPR/IP)

Figure 107 illustrates the BEX functionality.

Figure 107 BEX Functionality

					Downstream
						devices
CS/390		Emulated		Emulated			PU 2.0
		EN		NN
EN
			SNASw				EN
	Cisco CIP
CS/390
NN							LEN
							26186

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 illustrates the EE functionality.

Figure 108 EE 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
78-11737-02		BC-235