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NE40E V800R010C00 Feature Description - WAN Access 01

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Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
MP Principles

MP Principles

Principles

The Multilink protocol bundles multiple PPP links into an MP link to increase link bandwidth and reliability. MP fragments packets exceeding the maximum transmission unit (MTU) and sends these fragments to the PPP peer over the PPP links in the MP-group. The PPP peer then reassembles these fragments into packets and forwards these packets to the network layer. For packets that do not exceed the MTU, MP directly sends these packets over the PPP links in the MP-group to the PPP peer, which in turn forwards these packets to the network layer.

Implementation

An MP-group interface is dedicated to MP applications. MP is implemented by adding multiple interfaces to an MP-group interface.

MP Link Negotiation Process

Certain MP options, such as the maximum receive reconstructed unit (MRRU) and endpoint discriminator, are determined through Link Control Protocol (LCP) negotiation.

MP negotiation involves:
  • LCP negotiation: Devices on both ends negotiate LCP parameters and check whether they both work in MP mode. If they work in different working modes, LCP negotiation fails.
  • Network Control Protocol (NCP) negotiation: Devices on both ends perform NCP negotiation by using only NCP parameters (such as IP addresses) of the MP-group interfaces but not using the NCP parameters of physical interfaces.
If NCP negotiation succeeds, an MP link is established.

Benefits

MP provides the following benefits:
  • Increased bandwidth
  • Load balancing
  • Link backup
  • Reduced delay through packet fragmentation
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Updated: 2018-07-04

Document ID: EDOC1100027168

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