
Advanced Peer-to-Peer Networking Overview
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Figure 1-7. APPN ISR Routing Functions in SNA Architecture
Packet Segmentation and Reassembly
To maximize network performance, ISR sends the largest packet size allowable on
each network interface that you configure for APPN. Intermediate nodes, when
necessary, segment and reassemble packets of different packet sizes. The Max RU
Size for ISR Sessions parameter sets the maximum packet size for your APPN
configuration.
Adaptive Pacing
ISR’s Adaptive Pacing controls data flow and congestion by managing the number
of messages the network node receives during a session. To prevent memory
consumption, APPN uses “pacing windows” to control the maximum number of
incoming messages. During network activity, this pacing window changes
dynamically, allowing the receiving node to adjust the rate at which data flows
into its buffers.
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-Adaptive Pacing
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Reassembly
Application Data
Transport Connection
Transport Connection
APN0007A
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