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Configuring DLSw Services
1-4
304233-A Rev. 00
• Directed broadcast CANUREACH and ICANREACH control frames. This
feature reduces broadcasting over the network.
• Capabilities exchange, allowing routers to exchange resource information
about each other. Capabilities exchange flows operate in three categories:
-- Fixed information, such as an organization’s software version
-- Customized information, where one router transfers the information to
another router
-- Negotiation, where routers negotiate the use of proprietary functions (and
only if both routers support the functions under negotiation)
• Rate-based pacing, a new standard for flow control between routers. Flow
control allows a DLSw router to inform another router to slow down or stop
sending data when the receiving buffer(s) fill up. Rate-based flow control uses
a windowing mechanism that allows the routers to send more or fewer
packets, based on the state of the last receive window. If the router
successfully receives the last transmission, it informs the sending router to
continue to send more packets. Flow control is essential for successful
delivery of SNA and NetBIOS data.
DLSw Version 2 Unicast UDP Support
DLSw Version 2 and RFC 2166 are terms that can typically be used
interchangeably. However, Bay Networks refers to DLSw Version 2 slightly
differently. The Bay Networks implementation, called DLSw Version 2, offers
only unicast User Datagram Protocol (UDP) support, while the RFC 2166
implementation provides full multicast support.
Unicast UDP support is provided beginning with BayRS Version 11.02. This
implementation allows:
• The initial session establishment request (CanuReach) to be sent by unicast
UDP (as opposed to using TCP as in RFC 1434 and RFC 1795)
• Peer type configuration (TCP, UDP, and Unknown peers)
• You to configure dual uni-directional or single bi-directional TCP connections
The DLSw RFC Version parameter allows you to set up your configuration for
DLSw Version 2. A router that you configure for DLSw Version 2 can also
communicate with routers running RFC 1434 and RFC 1795 implementations.
- Configuring 1
- DLSw Services 1
- Trademarks 2
- Restricted Rights Legend 2
- Statement of Conditions 2
- Contents 5
- 304233-A Rev. 00 10
- Before You Begin 17
- Text Conventions 18
- Acronyms 19
- Related Publications 20
- How to Get Help 22
- Chapter 1 23
- Data Link Switching Overview 23
- DLSw Networking Overview 24
- RFC 1795 Support 25
- UDP Explorer Frames 27
- RFC 2166 Multicast Support 28
- Figure 1-3. Multicast DLSw 32
- Single-Switch Services 35
- Dual-Switch Services 37
- SNA PU Descriptions 39
- LLC Support 41
- SDLC Support 41
- Primary SDLC Support 42
- Secondary SDLC Support 43
- Negotiable SDLC Support 45
- Frame Relay Support 46
- QLLC Support 48
- DLSw/APPN Boundary Function 48
- DLSw/APPN Components 50
- DLSw Router 52
- PU2.1 devices 53
- DLSw Backup Peer Support 54
- DLSw Filtering 54
- DLSw Prioritization 55
- Protocol Prioritization 55
- Chapter 2 57
- DLSw Implementation Notes 57
- DLSw and Other Subsystems 58
- Combining DLSw and SRB 58
- SRB network 59
- Virtual Rings 60
- DLSw and SRB on a Circuit 61
- DLSw and Bridging Services 62
- DLSw with Translation Bridge 63
- . Parallel 65
- Multiple DLSw Peers on a LAN 66
- Memory Requirements 66
- TCP Considerations 67
- Flow Control 67
- LLC2 Flow Control 68
- DLSw Packaging 69
- DLSw Priority Queues 71
- Nonordered Queues 73
- The Dequeue List 73
- Weighted Dequeuing Algorithm 74
- Backup Peers 77
- Chapter 3 79
- Starting DLSw 79
- Starting DLSw over Ethernet 83
- Starting DLSw over Token Ring 84
- Starting DLSw over SDLC 84
- Configuring LLC Services 90
- Deleting DLSw from a Node 92
- Chapter 4 93
- DLSw SAP Table 96
- Configuring DLSw Services 100
- (continued) 101
- (continued) 102
- DLSw Slot Table 103
- Customizing DLSw Services 105
- DLSw Peer IP Table 107
- Broadcast Peers 110
- Unconfigured Peers 111
- Configuring SDLC 115
- Services 115
- Editing a Local Device 116
- Configuring DLSw Packaging 122
- APPN Services 126
- Configuring DLSw Backup Peers 130
- Configuring Traffic 139
- Appendix A 141
- DLSw Service Parameters 141
- Caution: 143
- DLSw Basic Global Parameters 144
- 170
- 171
- 173
- 176
- Parameters 192
- VCCT Slot Parameter 199
- Adding Queue Parameters 212
- Appendix B 217
- Predefined DLSw Criteria 218
- DLSw Reference Points 218
- (bits) Length (bits) 219
- Specifying MAC Address Ranges 220
- Table B-6. SAP Codes 222
- Appendix C 223
- Troubleshooting DLSw 223
- * Enabled by default 224
- Table C-2. Log Messages 225
- Table C-3. DLSw State Table 226
- Table C-4. DLSw Event Table 227
- Sample Log Entries 228
- DLSw Session Setup 229
- Reviewing the Network Log 232
- Unexpected protocol action 242
- TCP open error 29 243
- DLSw Troubleshooting Tables 244
- IBMLAN.INI 248
- NBASE.exe 249
- SDLC.exe 249
- Verifying the WAN Cabling 251
- Flow Diagrams 253
- RFC 1795 255
- DLSw Version 2.0 256
- Version 2.0 Router) 258
- RFC 1490 264
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