Patent ID: 8065434
Filing Date: 2011-11-22
Classification: H04L

Abstract:
1. A method for maintaining routes, applied in a communications network comprising multiple point of presence (PoP) groups, wherein each of the PoP groups comprises one or more PoP nodes, the method comprising: issuing, by PoP nodes within the same PoP group, routing information of a same super prefix; issuing, by PoP nodes within different PoP groups, routing information of different super prefixes; acquiring, by each PoP node, routing information of a detailed prefix covered by a super prefix issued by the PoP node itself from an edge network of the PoP node, wherein the acquired routing information of the detailed prefix covered by the super prefix is preset in the PoP node that issues the routing information of the super prefix or registered by a border router in the communications network dynamically, and wherein dynamically registering, by the border router in the communications network, the routing information of the detailed prefix covered by the super prefix comprises: receiving, by the border router, the routing information of the super prefix issued by the PoP node, generating a routing table, recording an address of the PoP node that issues the routing information of the super prefix in the routing table, and registering, by the border router, the routing information of the detailed prefix within the connected edge network with a proximate PoP node that issues the routing information of the super prefix covering the detailed prefix; and synchronizing, by each PoP node, the acquired routing information of the detailed prefix with the other PoP nodes within the same PoP group to make each PoP node to get routing information of all detailed prefixes covered by the super prefix.