Juniper JUNOSE 11.1.X - LINK LAYER CONFIGURATION 4-7-2010, Руководство по настройке

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Chapter 9
Configuring Multilink PPP
This chapter describes how to configure a Multilink Point-to-Point Protocol (PPP)
interface on E Series routers.
This chapter contains the following sections:
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Overview on page 303
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Platform Considerations on page 306
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References on page 307
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Supported MLPPP Features on page 308
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Unsupported MLPPP Features on page 312
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Before You Configure Static MLPPP on page 312
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Configuring Static MLPPP on page 312
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Configuring Dynamic MLPPP on page 323
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Configuring MLPPP Fragmentation and Reassembly on page 324
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Configuring Multiclass MLPPP on page 333
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Monitoring MLPPP on page 333
Overview
Multilink PPP (MLPPP; also referred to as PPP Multilink, MLP, and MP) aggregates
multiple physical links into a single logical bundle. More specifically, MLPPP bundles
multiple link-layer channels into a single network-layer channel. Peers negotiate
MLPPP during the initial phase of Link Control Protocol (LCP) option negotiation.
Each router indicates that it is multilink capable by sending the multilink option as
part of its initial LCP configuration request.
An MLPPP bundle can consist of multiple physical links of the same type—such as
multiple asynchronous lines—or can consist of physical links of different types—such
as leased synchronous lines and dial-up asynchronous lines.
The router acts on MLPPP like another PPP Network Control Protocol (NCP). Packets
received with an MLPPP header are subject to fragmentation, reassembly, and
sequencing. Packets received without the MLPPP header cannot be sequenced and
can be delivered only on a first-come, first-served basis.
Overview
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