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Unicast transmission method and system of BIER multicast in BIER domain

A transmission method and unicast technology, applied in transmission systems, digital transmission systems, electrical components, etc., can solve problems such as inability to realize MAC address verification and potential safety hazards

Active Publication Date: 2021-09-07
FENGHUO COMM SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The purpose of encapsulating the Layer 2 header into unicast is mainly to reduce the flooding of multicast traffic and the risk of being attacked, but it is directly encapsulated in the form of system unicast MAC, which cannot realize MAC address verification and has potential security risks.

Method used

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  • Unicast transmission method and system of BIER multicast in BIER domain
  • Unicast transmission method and system of BIER multicast in BIER domain

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Embodiment Construction

[0033] Embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings.

[0034] The embodiment of the present invention provides a kind of unicast transmission method of BIER multicast in BIER domain, comprises the following steps:

[0035] When the ingress device in the BIER domain receives a common L3 multicast message, it encapsulates the BIER header to generate a BIER multicast message;

[0036] When the ingress device in the BIER domain or other devices in the domain get the BIER multicast message, if there is no next-hop unicast MAC address entry, the ARP MISS / Request mechanism will be triggered, and the next-hop list will be generated according to the reply of the next-hop device. broadcast MAC address entry, if it exists, it will not be triggered; the next-hop unicast MAC address read from the next-hop unicast MAC address entry will be encapsulated into the BIER multicast packet as a layer 2 header and sent ...

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Abstract

The invention discloses a unicast transmission method and system of BIER multicast in a BIER domain, and relates to the technical field of BIER multicast. The method comprises: when a BIER multicast message is obtained through equipment in the BIER domain, if no next-hop unicast MAC address table entry exists currently, triggering an ARP MISS / Request mechanism, and generating the next-hop unicast MAC address table entry according to a reply of next-hop equipment; packaging the next-hop unicast MAC address, as a two-layer head, into a BIER multicast message and sending the BIER multicast message to the next-hop equipment; and when the next-hop equipment receives the BIER multicast message, verifying the two-layer unicast MAC address of the BIER multicast message, and discarding an invalid message. Thus, the unicast transmission of the BIER multicast in the BIER domain is realized, and the network multicast traffic is reduced. The next-hop unicast MAC address table entry is unidirectionally generated in combination with the characteristics of multicast unidirectional transmission, so that space resources are saved. A receiving end performs unicast MAC address verification to prevent network flooding and attack.

Description

technical field [0001] The invention relates to the technical field of BIER multicast, in particular to a unicast transmission method and system for BIER multicast in a BIER domain. Background technique [0002] With the development of large video services such as Internet video, VR, and AR, the demand for multicast traffic replication within DCs and between DCs is increasing rapidly, and traditional multicast technologies can no longer meet the needs of new service development. BIER (Bit Indexed Explicit Replication, Bit Indexed Explicit Replication) technology provides a very simplified way to implement multicast traffic forwarding in the intermediate network. On the control plane, BIER assigns a unique bit identifier to each node in the network domain, and floods it in the BIER domain through the IGP extension protocol. Each node generates a BIER forwarding table based on the IGP topology and BIER extension information of the IGP. The local BIER The forwarding table entr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/761H04L12/741H04L45/16H04L45/74
CPCH04L45/16H04L45/74
Inventor 赵继诚
Owner FENGHUO COMM SCI & TECH CO LTD