Classification processing method and network equipment for multi-protocol label switching service

Abstract

The invention discloses a method for classifying and processing MPLS services: multi-protocol label switching MPLS network equipment divides MPLS labels into several label ranges, and forms each label range and forwarding etc. The corresponding relationship of price class aggregation; the MPLS network device determines the label range to which the label in the received MPLS service belongs, and determines the forwarding equivalence class aggregation of the MPLS service through the corresponding relationship between the label range and the forwarding equivalence class aggregation, and executes the forwarding The processing flow corresponding to the aggregation of equivalence classes. The invention also discloses a multi-protocol label switching service classification network device. In the present invention, the size of the MPLS label mapping table corresponding to each forwarding equivalence class aggregation is reduced to the size of the label block of the block, which improves the label table search efficiency; and can flexibly classify business processing and realize good differentiated services.

Description

Technical field [0001] The invention relates to the technical field of MPLS (Multi Protocol Label Switch, multi-protocol label switching), in particular to a multi-protocol label switching service classification processing method and network equipment. Background technique [0002] Multi-protocol label switching uses short and fixed-length labels to encapsulate Layer 3 packets and Layer 2 data frames, and forwards only based on the labels on the MPLS network, without the need for complex routing lookups like IP. The MPLS header is 32 bits, such as figure 1 As shown, among them, 0 to 20 bits are the tag value, 21 to 22 bits are CoS (class of service), 23 bits are S (stack indication, indicating whether the tag is the lowest level tag), and 24 to 32 bits are TTL (Time to Live, survival time). [0003] VPN (Virtual Private Network, virtual private network) business is one of the most important applications of MPLS. MPLS VPN can be divided into two categories: L3VPN (Layer 3 VPN) an...

AI Technical Summary

Problems solved by technology

[0010] In the prior art, when an MPLS network device processes an MPLS message, it is impossible to predict the service type of the label before querying the label mapping table, so it is also impossible to determine which processing flow the MPLS message enters, that is, it cannot be guided by the label itself. One-step business process diversion requires further query label mapping table to determine

Assume that an MPLS network device needs to perform ACL (Access Control List, Access Control List) on VPLS packets and L3VPN packets into different engines for processing, because each label will consume an ACL rule, and the system cannot provide such a rule at all. Great ACL resource

[0011] In addition, the existing global label space block model shared by all services also leads to a large number of entries in the service label mapping table, and when it is necessary to classify related services and processing processes, the contents of the entries are complex, which affects forwarding efficiency

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