Content and network fused anycast routing system and method

Abstract

The invention relates to a content and network fused anycast routing system located in a network environment comprising an edge network and a kernel network. The system comprises a mapping server, an edge router and servers. The edge router is provided in the edge network at a junction of the edge network and the kernel network. The mapping server is located in the edge network. The servers are disposed in the edge network. In the edge network, routing is performed based on local identifiers, and anycast is based on routing. In the kernel network, routing is performed based on global position symbols, and anycast is based on querying. The mapping server is used for storing load conditions of the servers and providing server copies, used for describing the load conditions of the servers, to the edge router. The edge router acquires the server copies, selects the optimal one from the server copies, transmits customer demands to the optimal server and performs global position symbol and local identifier conversion for the customer demands.

Description

technical field [0001] The invention relates to the field of network communication, in particular to an anycast routing system and method for integrating content and network. Background technique [0002] Anycast is formally defined in RFC2373 as a standard service model. On the IP network, a group of hosts that provide a specific service are identified by an anycast address. The service access party does not care about which host provides the service (such as DNS or mirroring service), and the packets accessing this address are sent by the IP network. Route to the "nearest" destination host in this set of destination hosts as measured by the routing protocol. Anycast provides a stateless, best-effort service. The definition of anycast is as follows figure 1 As shown, the same server located in different places in the network is named "A", and the packet sent by the client with the destination address "A" will be routed to the nearest server. For example, client 1's requ...

AI Technical Summary

Problems solved by technology

[0005] The disadvantages of anycast technology based on route-by-name are: first, the selection of servers only depends on routing metrics, which lacks flexibility; second, anycast addresses are published to the entire routing system, which makes the routing table bloat, And seriously affect the routing scalability; third, in the future network architecture based on name routing (such as DONA, CCN and SCAFFOLD), variable-length names reduce the effectiveness of routing

[0006] The disadvantages of anycast technology based on lookup-by-name are as follows: first, server selection cannot respond to network status changes in a timely manner, which will affect the effectiveness of server selection; Introduced a system that resulted in inaccurate server selection

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