Avaya Configuring DLSw Services User Manual Page 263
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- Table of contents
- TROUBLESHOOTING
- BOOKMARKS
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Troubleshooting DLSw
303523-A Rev. 00
C-7
SSP XID frame rcvd in LLC -- The type of frame received (XID) and where it was
received (LLC, SDLC).
conn (30927f70) -- The unique connection identifier for this DLSw circuit. It will
correspond to the correlator described in the DLSw RFCs state (4), CIRCUIT
ESTABLISHED, as listed in the DLSw state table (refer to Table C-3
).
flag (201) -- Bay Networks use only.
DLSw Session Setup
Before configuring DLSw, you should be familiar with how DLSw establishes
sessions between network endpoints. To establish SNA or NetBIOS sessions
between endpoints (devices), Bay Networks routers with DLSw enabled execute
the following sequence of events.
• Upon receiving a TEST (POLL) or similar frame from an attached endstation,
the receiving slot performs the following:
-- Converts the TEST (POLL) frame into an SSP CANUREACH command.
-- Searches the appropriate cache to determine if the remote location is
known. If the remote location is already in the cache, the CANUREACH
is forwarded only to this remote location. If the remote location is not in
the cache, DLSw forwards the CANUREACH to all remote routers
specified in the DLSw Peer IP Table, if this table exists.
-- Forwards the packet to all other slots defined in the DLSw Slot Table.
• Upon receiving a CANUREACH frame, a DLSw slot:
-- Forwards the frame to all other slots defined in this router’s DLSw Slot
Table.
-- Converts the CANUREACH frame back to a TEST (POLL) frame.
-- Forwards the TEST (POLL) frame to all interfaces on this slot which have
DLSw enabled.
• If the destination device resides on an attached LAN, then this device
responds by broadcasting a TEST (RESPONSE) message. Upon receiving
this response, the remote router:
-- Caches the MAC address (for SNA) or name (for NetBIOS) in the
appropriate table on the router.
- 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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