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SDLC Support ..............................................................................................................1-17
Primary SDLC Support ..........................................................................................1-17
Secondary SDLC Support .....................................................................................1-19
Combining Primary and Secondary SDLC ............................................................1-21
Frame Relay Support ...................................................................................................1-22
Boundary Network Node (RFC 1490) ....................................................................1-23
Boundary Access Node .........................................................................................1-24
QLLC Support ..............................................................................................................1-24
DLSw/APPN Boundary Function ..................................................................................1-24
DLSw/APPN Network Configurations ....................................................................1-24
DLSw/APPN Components .....................................................................................1-26
DLSw Backup Peer Support .........................................................................................1-29
DLSw Filtering ..............................................................................................................1-29
DLSw Prioritization .................................................................................................1-29
Protocol Prioritization .............................................................................................1-30
For More Information About DLSw ...............................................................................1-30
Chapter 2
DLSw Implementation Notes
DLSw and Other Subsystems ........................................................................................2-1
Combining DLSw and SRB ............................................................................................2-2
Virtual Rings .............................................................................................................2-4
DLSw and SRB on a Circuit .....................................................................................2-5
DLSw and Bridging Services ..........................................................................................2-6
DLSw on an Ethernet/802.3 Circuit ..........................................................................2-6
DLSw with Translation Bridge .........................................................................................2-7
Using DLSw Independently of the Translation Bridge ..............................................2-8
Parallel Bridge and DLSw Paths .....................................................................................2-9
Multiple DLSw Peers on a LAN ....................................................................................2-10
Memory Requirements .................................................................................................2-10
TCP Considerations .....................................................................................................2-11
Flow Control .................................................................................................................2-11
LLC2 Flow Control .................................................................................................2-11
TCP Flow Control ...................................................................................................2-12
DLSw Flow Control ................................................................................................2-12
DLSw Packaging ....................................................................................................2-13
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