Method and device for verifying network connectivity

Abstract

The invention discloses a network connectivity verification method. A controller receives a connectivity verification CV message, the CV message includes a flow ID, or the CV message includes a flow ID and a table ID; the controller Verifying network connectivity according to the flow ID in the CV message, or verifying network connectivity according to the flow ID and table ID in the CV message. The invention also discloses a network connectivity verification device at the same time.

Description

technical field [0001] The present invention relates to the technical field of Software Defined Network (SDN, Software Defined Network), in particular to a network connectivity verification method and device. Background technique [0002] As the current network has exposed more and more disadvantages and people's demand for network performance has improved, more and more complex functions have been added to the architecture of routers, such as: Open Shortest Path First (OSPF, Open Shortest Path First), Border Gateway Protocol (BGP, Border Gateway Protocol), Multicast, Differentiated Services, Traffic Engineering, Network Address Translation (NAT, Network Address Translation), Firewall, Multi-Protocol Label Switching (MPLS, Multi-Protocol Label Switching )and many more. This makes switching devices such as routers more and more bloated and the space for performance improvement is getting smaller and smaller. [0003] However, quite different from the plight of the network f...

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Problems solved by technology

[0008] Specifically, in terms of application scenarios, RFC6428 defines the connectivity verification (CV, ConnectivityVerification) message of MPLS-TP to detect whether an LSP is wrongly connected. The message format is as follows: figure 2 As shown, it includes fields such as version number, flag bit, fast forwarding detection connection detection message, fast forwarding detection connection control message, source maintenance entity group endpoint identifier type length value (TLV, Type Length Value); the source The endpoint identifier TLV field of the maintenance entity group uses the identifier of the LSP endpoint defined in RFC6370, and the specific format is as follows image 3 As shown, it contains the channel number and label switching path number fields closely related to RSVP-TE signaling information, but in the SDN / Openflow scenario, the device cannot recognize the channel number and label switching path number fields related to RSVP-TE signaling. Therefore, the existing CV messages cannot be applied to SDN / Openflow scenarios to achieve network connectivity verification

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