Patent ID: 8724514

Claim:
A device for controlling advertising of routing data from a first router to second routers, the routing data comprising prefixes related to areas of a data transfer network accessible via the first router, and the device comprising a processor arranged to: maintain a main list of the prefixes so that each prefix has a predecessor and/or a successor on the main list, maintain indicator vectors so that each of the prefixes is associated with one of the indicator vectors, each indicator vector containing a data item for each of the second routers and each data item of this indicator vector indicating whether the prefix associated to this indicator vector is to be advertised to the second router associated with this data item, maintain, for each of the second routers, a main handling pointer pointing to a particular one of the prefixes that is relevant to a prevailing status of an advertising process related to this second router, said main handling pointer being moved forward on the main list of the prefixes when the prefixes are being advertised to the second router associated with the main handling pointer, and determine, concerning each second router on the basis of the indicator vector associated with the prefix corresponding to a position of the main handling pointer related to this second router, whether or not this prefix needs to be advertised to this second router.