Metadata transmission method and device

A transmission method and technology of a transmission device, applied in the field of metadata, can solve the problem of not supporting segment routing packets to carry metadata, etc., and achieve the effect of improving the accuracy of data transmission and improving the efficiency of data transmission

Active Publication Date: 2021-05-11
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For segment routing technology networks, the current data plane encapsulation and control plane protocols do not support segment routing packets to carry metadata

Method used

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  • Metadata transmission method and device
  • Metadata transmission method and device
  • Metadata transmission method and device

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Experimental program
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specific Embodiment 1

[0073] Such as Figure 5 as shown, Figure 5 Among them, I is the ingress SR node, which is responsible for the encapsulation of SR messages, E is the egress node, which decapsulates the SR messages, and A, B, C, and D are the intermediate transmission SR nodes, which are responsible for the transmission of SR messages.

[0074] When the SR node encapsulates the LSPDU (link State Packet Data Unit, the link state data message unit), the ISIS Router capability TLV is encapsulated, wherein the ISIS Router capability TLV carries the Segment Routing Metadata Sub-TLV proposed by the present invention, and the SR node is in After encapsulating the LSPDU, use the ISIS flooding mechanism to flood in the SR domain. When the neighbor SR router of the SR node in the SR domain receives the LDPDU, it can determine the Segment Routing Metadata Sub-TLV carried. The above SR routers support Metadata data.

specific Embodiment 2

[0076] still with Figure 5 An example is used to describe the detailed process of using the OSPF protocol to advertise metadata capability attributes in the present invention.

[0077] If the IGP protocol supported by the SR network is the OSPFv2 protocol, when the SR node encapsulates the LSA (link State Advertise, Link State Advertisement) message, it needs to encapsulate the OSPFv2Router Information (RI) Opaque LSA, wherein the OSPFv2Router Information (RI) Opaque LSA carries the present invention Proposed Segment RoutingMetadata TLV. If the IGP protocol supported by the SR network is the OSPFv3 protocol, the SR encapsulates the OSPFv3Router information opaque LSA when encapsulating the LSA message, wherein the OSPFv3Router information opaque LSA carries the Segment Routing Metadata TLV proposed by the present invention. Regardless of whether the SR network supports OSPFv2 or OSPFv3, the SR node uses the OSPF flooding mechanism to flood the SR domain. When the neighbor SR...

specific Embodiment 3

[0079] The embodiment of the present invention combines Figure 6 The process of using the BGP-LS protocol to announce the metadata capability attribute proposed by the present invention is described.

[0080] Figure 6Among them, there are three AS (Autonomous System, autonomous system), AS1, AS2, and AS3, among which SR routers A, B, and C are in the AS1 autonomous system domain, SR router D belongs to AS2, SR routers E, F belong to AS3, and SR routers in AS1 belong to Border SR router C establishes BGP peers with C in AS2 and E and F in AS3 respectively, and uses the BGP-LS protocol to advertise link state information and node attribute information.

[0081] Router C in AS1 notifies routing information to its peers. When encapsulating the update message message, according to the idea of ​​the present invention, router C will fill in node attribute TLV information, and the node attribute TLV will carry the Segment Routing proposed by the present invention. metadata sub-TLV...

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Abstract

The invention discloses a metadata transmission method and device. The method includes: extending the protocol message in the routing protocol, so that the extended protocol message supports notification segment routing. The equipment in the Segment Routing network has a processing element Data Metadata capabilities.

Description

technical field [0001] The invention relates to metadata in the field of segment routing (Segment Routing) network, in particular to a metadata transmission method and device. Background technique [0002] Segment routing is a routing method based on source address, through the header of the existing Multi-Protocol Label Switching (MPLS, Multi-Protocol Label Switching) network or Internet Protocol Version 6 (IPv6, Internet Protocol Version 6) message The header carries the segment routing header (Segment Routing Header), and the segment routing header (SR Header, Segment Routing Header) carries a series of indicating operations (also called segment operations) for data routing in the network and transmission. Through segment routing, it is very convenient to realize network load balancing and process engineering, as well as complex network functions such as fast rerouting. The segment operation instruction can also be extended to implement service or topology-based routing...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/721H04L12/723H04L12/751H04L45/02H04L45/50
CPCH04L45/02H04L45/12H04L45/50
Inventor 胡方伟廖婷
Owner ZTE CORP
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