Table of Contents
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Chapter 10
Configuring Multiclass Multilink PPP
Multiclass MLPPP Overview
Multiclass MLPPP Fragmentation and Reassembly
Multiclass MLPPP Overview on page 349
Multiclass MLPPP Traffic Classes Overview on page 350
Multiclass MLPPP LCP Extensions Overview on page 351
Multiclass MLPPP Platform Considerations on page 351
Multiclass MLPPP References on page 352
Configuring Multiclass MLPPP on page 352
Enabling Multiclass MLPPP on page 353
Configuring Traffic Classes on Multiclass MLPPP Interfaces on page 354
Configuring Fragmentation on Multiclass MLPPP Interfaces on page 355
Configuring Reassembly on Multiclass MLPPP Interfaces on page 355
Example: Configuring Multiclass MLPPP on a Dynamic Interface on page 356
Example: Configuring Multiclass MLPPP on a Static Interface on page 357
Monitoring Multiclass MLPPP on page 358
Multiclass MLPPP enables the fragmentation of data packets of different priorities
into multiple classes in an MLPPP bundle. It enables you to interleave data packets
of higher priority between packets of lower priority before transmission.
When the MLPPP bundle consists of more than one multilink interface, multiclass
MLPPP ensures the delivery of high-priority, delay-sensitive traffic, such as voice and
video, in the proper sequence. Multiclass MLPPP accomplishes this by creating
separate transmit and receive contexts for every multilink class in the MLPPP bundle.
The transmit and receive contexts contain the sequence numbers and all other
statistics pertaining to the multilink class
You can configure fragmentation and reassembly on a multiclass MLPPP interface.
Fragmentation is the process by which a large packet is broken up into multiple
smaller fragments for simultaneous transmission across multiple links of an MLPPP
bundle. Reassembly is the process by which the destination router reassembles the
fragments into the original packets.
Multiclass MLPPP Overview
349
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Troubleshooting
