Cisco Interface Processors

Table Of Contents

Product Bulletin, No. 1547

Overview

Implementation Plan

Product Bulletin, No. 1547

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Enterprise Data Center Networking Implementation Plan

Overview

This bulletin provides a suggested outline of an implementation plan for enterprise data center networking solutions with respect to IBM mainframes. This plan can be customized as necessary for the solutions and migration path that works best for your network. As a starting point, it includes:

•Installing SNA Switching Services (SNASw) with Dependent Logical Unit Requester/Dependent Logical Unit Server (DLUR/DLUS) and enabling it for TN3270 Server

•Migrating Data-Link Switching Plus (DLSw+) in the WAN to SNASw

•Replacing DLSw+ and extending SNASw all the way to the remote branch

•Converting SNA applications to IP

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Note: SNASw can be enabled for customers who use Cisco TN3270 Server remote from the data center and those who want a single-protocol, IP path to the mainframe logical partitions (LPARs).

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Implementation Plan

The introduction of SNASw capabilities to an existing network design could follow a plan as outlined in Table 1. The advantage of a plan is to introduce specific network benefits according to a schedule, allowing for proper resource allocation, planning, change control, and configuration and installation. The end result is a simplified data center design, an all-IP consolidated network, and continued support for SNA applications as necessary.

Table 1  Implementation Plan Outline 

Phase	Step	Description
Phase 1		Enable SNASw for TN3270 Server
	1	Perform capacity planning
	2	Plan backup strategy
	3	Install and configure SNASw upstream links and DLUR/DLUS
	4	Migrate current TN3270 Server upstream path to SNASw
Phase 2		Enable SNASw for DLSw+ WAN
	1	Perform capacity planning
	2	Plan backup strategy
	3	Install and configure SNASw upstream links and DLUR/DLUS
	4	Migrate current DLSw+ peer connections to SNASw
Phase 3		Replace DLSw+ with SNASw at the Remote Branch
	1	Perform capacity planning
	2	Ensure remote router resources are adequate; if not, perform necessary upgrades
	3	Install and configure SNASw upstream links and DLUR/DLUS
	4	Remove DLSw+ configuration from remote routers
	5	Eliminate DLSw+ from data center peer routers when all changes to remote routers are complete
Phase 4		Convert SNA-based applications to IP
	1	Perform study of all SNA-based applications in use
	2	Determine strategy and plan for each application
	3	Make decision on future development and strategy
	4	Perform planning for conversion
	5	Implement plans
	6	When complete, remove all SNA protocol support