Expand Configuration and Management Manual (H06.21+, J06.10+)

Subsystem Description
Expand Configuration and Management Manual — 529522-013
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Constructing Multipacket Frames
•
If the Layer 2 protocol is NETIP, each Expand packet is handled as a separate
UDP frame.
•
If the Layer 2 protocol is NETATM, each Expand packet is handled as a separate
ATM frame.
Figure 17-19 shows how Expand packets are sent over a direct-connect (HDLC)
connection when the multipacket frame feature is not selected.
In Figure 17-19, a message is passed to a direct-connect Expand line-handler process
that requires six Expand packets. The Expand line-handler process sends each packet
in a separate HDLC-type frame.
Figure 17-20 on page 17-65 shows how the same message is handled when the
multipacket frame feature is selected.
In Figure
17-20 on page 17-65, a message is passed to the direct-connect line-handler
process with the multipacket frame feature selected. The direct-connect line-handler
process still fragments the message into six Expand packets but now constructs one
large multipacket frame to hold all six packets. If the entire multipacket frame fits inside
one HDLC-type frame, it is sent across the line in one frame.
Figure 17-19. Multipacket Frame Feature Not Selected
VST031.vsd
Message
Direct-Connect
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Handler Process
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HDLC-Type
Frames
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Packets
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