IBM BC-203 manual Rsrb, BC-204

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Overview of IBM Networking

RSRB

Note All commands supported on the Cisco 7500 series routers are also supported on the

Cisco 7000 series routers.

RSRB

In contrast to Source-Route Bridging (SRB), which involves bridging between Token Ring media only, RSRB is Cisco’s first technique for connecting Token Ring networks over non-Token Ring network segments. (DLSw+ is Cisco’s strategic method for providing this function.)

Cisco’s RSRB software implementation includes the following features:

Provides for multiple routers separated by non-Token Ring segments. Three options are available:

Encapsulate the Token Ring traffic inside IP datagrams passed over a Transmission Control Protocol (TCP) connection between two routers.

Use Fast-Sequenced Transport (FST) to transport RSRB packets to their peers without TCP or User Datagram Protocol (UDP) header or processor overhead.

Use data link layer encapsulations over a single serial line, Ethernet, Token Ring, or Fiber Distributed Data Interface (FDDI) ring connected between two routers attached to Token Ring networks.

Provides for configurable limits to the size of the TCP backup queue.

Figure 85 shows an RSRB topology. The virtual ring can extend across any non-Token Ring media supported by RSRB, such as serial, Ethernet, FDDI, and WANs. The type of media you select determines the way you set up RSRB.

Figure 85 RSRB Topology

 

Virtual ring

Token

Non-Token Ring

Ring

Media

Token

Token

Ring

Ring

Token

Ring

S2327

Note If you bridge across Token Ring media, it is recommended that you do not use RSRB. Use SRB instead. Refer to the chapter “Configuring Source-Route Bridging.”

Cisco IOS Bridging and IBM Networking Configuration Guide

BC-204

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Contents Overview of IBM Networking BC-203Rsrb BC-204Configuration Considerations BC-205DLSw+ BC-206BC-207 DLSw StandardDLSw Version 2 Standard IP Multicast DLSw+ FeaturesEnhanced Peer-on-Demand Routing Feature UDP UnicastLocal Acknowledgment BC-209BC-210 LLC2 Session Without Local AcknowledgmentBC-211 DLSw+ Support for Other SNA Features BC-212BC-213 Stun and BstunStun Networks Stun Features BC-214BC-215 BC-216 StunBstun Networks Bstun FeaturesLLC2 and Sdlc Parameters BC-217Cisco’s Implementation of LLC2 BC-218BC-219 IBM Network Media TranslationCisco’s Implementation of Sdlc BC-220 Sdllc Media Translation FeaturesVirtual Token Ring Concept Other Considerations Resolving Differences in LLC2 and Sdlc Frame SizeMaintaining a Dynamic RIF Cache BC-221Qllc Conversion BC-222Cisco’s Implementation of Qllc Conversion BC-223Comparing Qllc Conversion to Sdllc BC-224Other Implementation Considerations BC-225RFC 1490 Routed Format for LLC2 BNN BC-226RFC 1490 Bridged Format for LLC2 BAN BC-227BC-228 NciaBC-229 Ncia ServerNcia Client/Server Model BC-230 Ncia Server Client/Server ModelMigration Support Advantages of the Client/Server ModelExtended Scalability BC-231BC-232 AlpsDspu and SNA Service Point BC-233BC-234 Router Acting as a Dspu ConcentratorBC-235 SNA Switching ServicesBenefits of SNASw IP Infrastructure Support Reduced Configuration RequirementsScalable Appn Networks Network Design SimplicityBC-237 HPR Capable SNA Routing ServicesBranch Extender Enterprise Extender HPR/IP BC-238Dynamic SNA BTU Size Usability FeaturesDynamic CP Name Generation Support Dlur Connect-OutManagement Enhancements Token Ring, Ethernet, and Fddi LAN and IP-Focused Connection TypesTrap MIB Support for Advanced Network Management Awareness Virtual Token RingVirtual Data-Link Control DLC Switching Support for Access to Sdlc and QllcCisco Transaction Connection Native IP Data-Link Control HPR/IPCtrc and Cics BC-243Ctrc and DB2 BC-244BC-245 Cmcc Adapter HardwareBenefits of Ctrc BC-246 Channel Interface ProcessorChannel Port Adapter Parallel Channel Port Adapter Differences between the CIP and CPAEscon Channel Port Adapter BC-247Supported Environments Cmcc Adapter Features for TCP/IP EnvironmentsCommon Link Access to Workstation TCP/IP OffloadBC-249 IP Host BackupCisco Multipath Channel+ BC-250 Cmcc Adapter Features for SNA EnvironmentsCisco SNA BC-251 Cisco Multipath ChannelTN3270 Server BC-252 SNA FunctionsTelnet Server Functions BC-253 BC-254