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Multiclass MLPPP LCP Extensions Overview
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Multiclass MLPPP Platform Considerations
Copyright © 2010, Juniper Networks, Inc.
Configuring Traffic Classes on Multiclass MLPPP Interfaces on page 350
Multiclass MLPPP Overview on page 345
Traffic Class and Traffic-Class Groups Overview
Link Control Protocol (LCP) establishes an MLPPP link by negotiating LCP options with
the MLPPP peer at the receiving end of a proposed connection. Peers negotiate multiclass
MLPPP during the initial phase of the LCP option negotiation.
LCP uses the following new LCP configuration options for establishing a multiclass
MLPPP link:
Multilink header format—Multilink header format has three functions:
It informs the receiving peer that the multiclass MLPPP feature is supported.
It informs the peer of the multilink header format that will be used.
It informs the peer of the number of multilink classes configured.
The router currently supports only the multilink header format option. The two number
formats that are negotiated for the multilink header format option are:
Short sequence number
Long sequence number—The router currently supports only long sequence numbers
Prefix elision—Prefix elision informs the receiving peer that only packets with a certain
prefix must be accepted. This prefix is not transmitted as part of the information in the
fragments of a multilink class. When the prefix is negotiated, all multilink packets must
be transmitted with the negotiated prefix removed from the start of the packet. The
prefix is empty for all classes, by default. The router currently does not support the
prefix elision option.
Multiclass MLPPP Overview on page 345
Configuring Multiclass MLPPP on page 348
Link Control Protocol in Chapter 8, Point-to-Point Protocol
You can configure multiclass MLPPP on the following E Series Broadband Services
Routers:
E120 router
E320 router
Chapter 10: Configuring Multiclass Multilink PPP
347
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