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BIER (Bit Indexed Explicit Replication) message transmission method and system

A transmission method and message transmission technology, applied in the field of network communication, can solve the problem that non-BIER nodes cannot transmit BIER messages, etc.

Inactive Publication Date: 2017-01-18
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the above technical problems, the present invention provides a method and system for transmitting BIER messages, which are used to solve the problem that non-BIER nodes in the existing BIER network cannot transmit BIER messages

Method used

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  • BIER (Bit Indexed Explicit Replication) message transmission method and system
  • BIER (Bit Indexed Explicit Replication) message transmission method and system
  • BIER (Bit Indexed Explicit Replication) message transmission method and system

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Embodiment 1

[0044] In this embodiment, the IS-IS protocol is used as the control plane protocol to construct the forwarding infrastructure of BIER in the BIER technology, and the IS-IS protocol notifies the sub-domain identification (sub-domain ID) of BIER, the BFR identification (BFR-ID), The BFR prefix (BFR-Prefix) and other necessary information are used by the IS-IS protocol to construct the bit index forwarding information table of BIER based on the shortest path tree algorithm. In this embodiment, the IS-IS protocol is used to advertise parameters such as tunnel type information, which are combined below Figure 5 The specific implementation method is described in detail.

[0045] Figure 5 It is the format diagram of IS-IS Router Capability TLV. Such as Figure 5 As shown, the Type value is 242, and the IS-IS Router Capability TLV is encapsulated in a Label Switched Path (LSP, Label Switched Path) packet of the IS-IS protocol, and is used to define and distribute the capability ...

Embodiment 2

[0051]In this embodiment, the BIER technology uses the OSPF routing protocol (including OSPFv2 and OSPFv3) as its control plane protocol, and its notification principle is similar to the path calculation method. Therefore, for the scenario where OSPF is used as the control plane protocol of the BIER technology, The extended OSPF protocol advertises parameters such as tunnel type information.

[0052] Figure 6 It is a format diagram of the OSPF Router Informational Capabilities TLV, which is used to notify router-related capability attribute information of the OSPF protocol. The TLV has already defined capability attributes such as OSPF graceful restart capable and OSPF graceful helper. This embodiment uses this TLV to carry the sub-TLV of the tunnel type information, wherein the sub-TLV format of the tunnel type information is still Figure 7 In the format shown, the type field here is recommended to be 6 (or to be determined, and finally assigned by the IEF IANA organizatio...

Embodiment 3

[0058] This embodiment describes the message transmission process when the non-BFR nodes in the BIER network support MPLS tunnels.

[0059] Figure 8 It is a flowchart of the transmission of BIER packets based on MPLS tunnels. Such as Figure 8 As shown, BFIR1, BFR2, BFR5, and BFER6 are nodes that support BIER technology (ie, BIER nodes), while non-BFR3 and non-BFR4 are nodes that do not support BIER technology (ie, non-BIER nodes). The nodes in the network support MPLS tunnel encapsulation (that is, the nodes in the network support the MPLS protocol, and the labels may be distributed by the LDP protocol or other technologies), BFIR1 is the ingress BFR node, and BFER6 is the egress BFR node. According to the forwarding principle of BIER, The transmission process of BIER message is as follows:

[0060] Step 301: The ingress node BFIR1 receives the multicast message, and the multicast message needs to be forwarded to the destination node BFER6;

[0061] Step 302: BFIR1 selec...

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Abstract

The invention discloses a BIER (Bit Indexed Explicit Replication) message transmission method and system. The method comprises the steps that a BIER node packages a BIER message according to link capability attribute information supported by a non-BIER node carried by an extended IGP (Interior Gateway Protocol); and the BIER node transmits the packaged BIER message to the non-BIER node. The BIER message transmission method and system disclosed by the invention are used for solving a problem that the non-BIER node cannot transmit the BIER message in an existing BIER network.

Description

technical field [0001] The present invention relates to network communication technology, in particular to a method and system for transmitting Bit Indexed Explicit Replication (BIER, Bit Indexed Explicit Replication) messages. Background technique [0002] Internet Protocol (IP, Internet Protocol) multicast technology realizes point-to-multipoint high-efficiency data transmission in IP network, can effectively save network bandwidth and reduce network load. Therefore, in real-time data transmission, multimedia conference, data copy, interactive It has a wide range of applications in many aspects such as IPTV, games and simulation. The current multicast technology generally adopts Protocol Independent Multicast (PIM, Protocol Independent Multicast) protocol (including Protocol Independent Multicast-Sparse Mode (PIM-SM, PIM-Sparse-Mode), Protocol Independent Multicast-Dense Mode (PIM- DM, PIM-Dense-Mode)), Multicast Source Discovery Protocol (MSDP, Multicast Source Discovery...

Claims

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Application Information

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IPC IPC(8): H04L12/723H04L12/911H04L12/46H04L45/16H04L45/50
CPCH04L12/4633H04L45/50H04L47/825H04L45/12H04L45/16H04L69/324H04L45/48H04L69/18
Inventor 胡方伟张征
Owner ZTE CORP
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