Allocating method for upper tag

Abstract

The invention provides an upstream label allocation method. All LSRs in the shared network segment reserve the same upstream allocated label space, and set upstream allocated label subspaces for each LSR in the upstream allocated label space, and the upstream allocated label subspaces of each LSR do not overlap with each other. Its upstream allocates label subspaces to allocate labels for downstream LSRs. The present invention does not appear the phenomenon of incoming label conflicts, and effectively solves the problem that the LSR needs to redesign the hardware forwarding process to support the specific background label space, and the present invention avoids the dependence of the LSR on the two-layer link encapsulation information and the tunnel encapsulation information and reduce the complexity of related protocols; thus, the present invention avoids the waste of resources caused by the transmission of multiple identical data packets in a shared network segment without changing the hardware forwarding process of the existing LSR, and realizes Simplify the upstream label allocation process and reduce the cost of LSR implementation.

Description

technical field [0001] The invention relates to the technical field of network communication, in particular to an upstream label allocation method. Background technique [0002] Multicast technology (Multicast) is a point-to-multipoint multi-party communication technology. [0003] Compared with the commonly used unicast technology, multicast technology reduces the occupation of link bandwidth resources by the same data in the network by establishing an optimal multicast forwarding path, thus greatly reducing the impact of multi-party communication on network resources. consumption. [0004] With the gradual maturity of MPLS (Multiprotocol Label Switching) related standards, the application fields of MPLS are constantly expanding. At present, the technology of forwarding multicast data on the MPLS network is constantly developing and maturing. LDP (Label Distribution Protocol) protocol is a label distribution protocol closely related to MPLS technology. LDP is mainly used...

AI Technical Summary

Problems solved by technology

In order to support the specific background label space, the upstream LSR and the downstream LSR need to negotiate and establish the specific background label space before multicast data forwarding, and, in the process of data forwarding, it is necessary to rely on layer 2 link information and tunnel encapsulation information, which greatly increases the complexity of related protocols and the complexity of the forwarding process

[0012] In the above-mentioned upstream label allocation mechanism, changes in hardware design will affect the deployment of the upstream label allocation mechanism in the network, increasing the design difficulty of upstream LSR and downstream LSR

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