IBM BC-203 Usability Features, Dynamic CP Name Generation Support, Dynamic SNA BTU Size, BC-239

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Overview of IBM Networking

Usability Features

Usability Features

SNASw contains the following usability features designed to make SNA networks easier to design and maintain:

•Dynamic CP Name Generation Support, page 239

•Dynamic SNA BTU Size, page 239

•DLUR Connect-Out, page 239

•Responsive Mode Adaptive Rate-Based Flow Control, page 240

•User-Settable Port Limits, page 240

Dynamic CP Name Generation Support

When scaling the SNASw function to hundreds or thousands of nodes, many network administrators find that defining a unique control point (CP) name on each node provides unnecessary configuration overhead. Dynamic CP name generation offers the ability to use the Cisco IOS hostname as the SNA CP name or to generate a CP name from an IP address. These facilities reuse one SNASw configuration across many routers and eliminate the specific configuration coordination previously required to configure a unique CP name for each SNA node in the network. Administrators can still explicitly configure the CP name within the SNASw configuration.

Dynamic SNA BTU Size

Most SNA node implementations require specific tuning of the SNA basic transmit unit (BTU) in the configuration. SNASw analyzes the interface maximum transfer units (MTUs) of the interfaces it uses and dynamically assigns the best MTU values for that specific port. For served dependent PU 2.0 devices, SNASw uses the downstream MAXDATA value from the host and dynamically sets the SNA BTU for that device to the MAXDATA value.

DLUR Connect-Out

SNASw can receive connect-out instructions from the IBM Communications Server for S/390. This function allows the system to dynamically connect-out to devices that are configured on the host with the appropriate connect-out definitions. This feature allows connectivity to SNA devices in the network that were traditionally configured for connect-out from the host.

Note DLUR connect-out can be performed over any supported data-link type.

Cisco IOS Bridging and IBM Networking Configuration Guide

BC-239

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Contents BC-203 Overview of IBM NetworkingBC-204 RsrbBC-205 Configuration ConsiderationsBC-206 DLSw+DLSw Version 2 Standard DLSw StandardBC-207 Enhanced Peer-on-Demand Routing Feature DLSw+ FeaturesIP Multicast UDP UnicastBC-209 Local AcknowledgmentLLC2 Session Without Local Acknowledgment BC-210BC-211 BC-212 DLSw+ Support for Other SNA FeaturesStun Networks Stun and BstunBC-213 BC-214 Stun FeaturesBC-215 Stun BC-216LLC2 and Sdlc Parameters Bstun FeaturesBstun Networks BC-217BC-218 Cisco’s Implementation of LLC2Cisco’s Implementation of Sdlc IBM Network Media TranslationBC-219 Virtual Token Ring Concept Sdllc Media Translation FeaturesBC-220 Maintaining a Dynamic RIF Cache Resolving Differences in LLC2 and Sdlc Frame SizeOther Considerations BC-221BC-222 Qllc ConversionBC-223 Cisco’s Implementation of Qllc ConversionBC-224 Comparing Qllc Conversion to SdllcBC-225 Other Implementation ConsiderationsBC-226 RFC 1490 Routed Format for LLC2 BNNBC-227 RFC 1490 Bridged Format for LLC2 BANNcia BC-228Ncia Client/Server Model Ncia ServerBC-229 Ncia Server Client/Server Model BC-230Extended Scalability Advantages of the Client/Server ModelMigration Support BC-231Alps BC-232BC-233 Dspu and SNA Service PointRouter Acting as a Dspu Concentrator BC-234Benefits of SNASw SNA Switching ServicesBC-235 Scalable Appn Networks Reduced Configuration RequirementsIP Infrastructure Support Network Design SimplicityBranch Extender HPR Capable SNA Routing ServicesBC-237 BC-238 Enterprise Extender HPR/IPDynamic CP Name Generation Support Usability FeaturesDynamic SNA BTU Size Dlur Connect-OutManagement Enhancements Trap MIB Support for Advanced Network Management Awareness LAN and IP-Focused Connection TypesToken Ring, Ethernet, and Fddi Virtual Token RingCisco Transaction Connection DLC Switching Support for Access to Sdlc and QllcVirtual Data-Link Control Native IP Data-Link Control HPR/IPBC-243 Ctrc and CicsBC-244 Ctrc and DB2Benefits of Ctrc Cmcc Adapter HardwareBC-245 Channel Port Adapter Channel Interface ProcessorBC-246 Escon Channel Port Adapter Differences between the CIP and CPAParallel Channel Port Adapter BC-247Common Link Access to Workstation Cmcc Adapter Features for TCP/IP EnvironmentsSupported Environments TCP/IP OffloadCisco Multipath Channel+ IP Host BackupBC-249 Cisco SNA Cmcc Adapter Features for SNA EnvironmentsBC-250 TN3270 Server Cisco Multipath ChannelBC-251 Telnet Server Functions SNA FunctionsBC-252 BC-253 BC-254
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