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Configuring DLSw Services
2-10
303523-A Rev. 00
Multiple DLSw Peers on a LAN
You can configure two or more DLSw nodes on the same SRB LAN. With this
configuration, each DLSw peer reaches a different set of remote NetBIOS and
SNA systems. In this case:
• Do not define a TCP connection between these Data Link Switches.
• Assign the same virtual ring IDs to each peer.
Taking these precautions prevents frames sent by one DLSw node from
propagating through the other DLSw node on the same SRB LAN.
Memory Requirements
DLSw provides buffering of LLC2 packets in single-switch mode, and additional
buffering of TCP packets in dual-switch mode. Therefore, DLSw can use a
significant amount of memory.
To limit the memory consumption, Bay Networks provides several mechanisms,
including:
• LLC2 Max Links parameter, allowing the network administrator to limit the
number of LLC2 stations per interface. Refer to Configuring LLC Services.
• DLSw Max Slot Sessions parameter, allowing the network administrator to
limit the number of LLC2 stations per slot. See Chapter 5
for instructions on
accessing and editing the Max Slot Sessions (DLSw global) parameter.
For more information about DLSw memory usage, contact the Bay Networks
Technical Support Center.
Note:
Do not configure multiple data link switches on an Ethernet/802.3
LAN. DLSw over Ethernet/802.3 LANs does not provide loop prevention.
- Configuring DLSw 1
- Services 1
- Trademarks 2
- Restricted Rights Legend 2
- Statement of Conditions 2
- Contents 5
- 303523-A Rev. 00 10
- Before You Begin 19
- Text Conventions 20
- Acronyms 21
- How to Get Help 23
- Chapter 1 25
- Data Link Switching Overview 25
- DLSw Networking Overview 26
- RFC 1795 Support 27
- UDP Explorer Frames 29
- RFC 2166 Multicast Support 30
- Figure 1-3. Multicast DLSw 34
- Single-Switch Services 37
- Dual-Switch Services 39
- SDLC Support 41
- Secondary SDLC Support 43
- Frame Relay Support 46
- QLLC Support 48
- DLSw/APPN Boundary Function 48
- DLSw/APPN Components 50
- DLSw Router 52
- DLSw Backup Peer Support 53
- DLSw Filtering 53
- Protocol Prioritization 54
- Chapter 2 57
- DLSw Implementation Notes 57
- 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
- Multiple DLSw Peers on a LAN 66
- Memory Requirements 66
- TCP Considerations 67
- Flow Control 67
- TCP Flow Control 68
- DLSw Flow Control 68
- DLSw Prioritization 69
- Backup Peers 70
- Chapter 3 71
- DLSw Configuration Overview 71
- DLSw Basic Global Parameters 73
- DLSw SAP Table 74
- SAP Table 75
- DLSw Slot Table 80
- DLSw Peer IP Table 82
- Broadcast Peers 84
- Unconfigured Peers 85
- SDLC Line Parameters 87
- Local Devices 87
- Boundary Access Node (BAN) 89
- Configuring DLSw Packaging 92
- Configuring DLSw Backup Peers 93
- Chapter 4 95
- Configuring DLSw Services 100
- Starting DLSw 101
- Mapping Frame Relay Addresses 106
- Configuring DLSw and APPN 127
- Chapter 5 137
- Editing DLSw Parameters 137
- Accessing DLSw Parameters 138
- Click on OK 140
- Enabling a DLSw Interface 158
- Click on Add 173
- Adding a DLSw SAP Table Entry 178
- Click on Apply 192
- Click on Done 192
- (continued) 199
- (continued) 200
- Deleting DLSw from a Node 212
- Chapter 6 213
- Using DLSw Prioritization 213
- DLSw Priority Queues 215
- The Dequeuing Process 216
- Weight = 217
- Size of packet 217
- Bandwidth % 217
- - Time in dequeue list 217
- Queue Depth 219
- Appendix A 245
- DLSw Default Settings 245
- Appendix B 251
- Predefined DLSw Criteria 252
- DLSw Reference Points 252
- (bits) Length (bits) 253
- Specifying MAC Address Ranges 254
- Table B-6. SAP Codes 256
- Appendix C 257
- Troubleshooting DLSw 257
- * Enabled by default 258
- Table C-2. Log Messages 259
- Table C-3. DLSw State Table 260
- Table C-4. DLSw Event Table 260
- DLSw Session Setup 263
- Reviewing the Network Log 266
- Unexpected protocol action 276
- TCP open error 29 277
- DLSw Troubleshooting Tables 278
- IBMLAN.INI 282
- NBASE.exe 283
- SDLC.exe 283
- Verifying the WAN Cabling 285
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