System and method for guaranteeing bandwidth based on VPP

Abstract

The invention discloses a system and method for guaranteeing bandwidth based on VPP. The system comprises an input interface, a QOS module, an interface bandwidth module and an output interface which are connected in sequence. And the QOS module marks whether the data packet is the guaranteed bandwidth, the data packet with the guaranteed bandwidth is directly forwarded at the interface bandwidth module, and the data packet with the non-guaranteed bandwidth is preemptively forwarded at the interface bandwidth, so that the function of guaranteeing the bandwidth is realized. According to the method, the problem of ensuring bandwidth flow forwarding under the preemption condition of the VPP is solved in a cache-free and scheduling-queue-free mode of ensuring the bandwidth, the data packet ensuring the bandwidth is directly forwarded at the interface bandwidth module, and the data packets of other bandwidths are preempted at the interface bandwidth; normal communication under the condition of preempting the traffic or attacking the traffic is ensured, and the influence on the forwarding performance of the whole system is minimized.

Description

technical field [0001] The invention belongs to the technical field of computer networks, and in particular relates to a system and method for guaranteeing bandwidth based on VPP. Background technique [0002] The VPP platform is an extensible framework that provides features such as a router firewall out of the box. It is an open-source version of Cisco's Vector Packet Processing (VPP) technology, a high-performance packet processing stack that runs on commodity CPUs. But on routers or firewalls, QOS, as a basic security mechanism used to solve problems such as network delay and congestion, not only requires it to provide the function of limiting bandwidth, but also hopes that it can provide the function of guaranteeing bandwidth. [0003] The QOS function of the existing VPP framework is based on a configuration strategy. It calculates the token filling rate in the clock cycle according to the configured bandwidth. The clock interval is used as the time length, and then ...

AI Technical Summary

Problems solved by technology

The QOS of VPP realizes the bandwidth limit function, but there is no bandwidth guarantee function, that is, when the configured bandwidth limit function has other attack traffic or traffic preemption, the VPP QOS bandwidth cannot guarantee the guaranteed bandwidth traffic in the configuration to be forwarded Yes, the configured guaranteed bandwidth traffic may be preempted at this time, causing the data traffic under the configured guaranteed bandwidth traffic to not be forwarded normally

[0006] The conventional QOS method is to mark the priority of the data packets of different strategies and put them into the priority queue for forwarding, but the result of this is the increase of delay and resources, which will seriously reduce the forwarding performance of VPP

For example, the prior art discloses an intelligent QOS method and system based on token buckets. The patent application number is CN201710184142.1. The guaranteed bandwidth is handed over to the scheduling queue through the buffer zone, which will increase the time for VPP. Delay is also inconsistent with VPP's vector processing implementation concept. It breaks VPP's instruction prefetch and will seriously affect VPP's forwarding performance.

[0007] Therefore, the present invention provides a system and method for guaranteeing bandwidth based on VPP, aiming at solving the problem of VPP guaranteeing bandwidth traffic forwarding under such preemptive conditions

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