Method and device for solving SDN (software defined networking) flow level configuration consistency updating
A consistency and level technology, applied in the field of computer networks, can solve problems such as inability to disappear, occupy a large space, attack, etc., and achieve the effect of preventing flow table expansion, saving space, and ensuring continuous stability
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[0048] The present invention will be further described below with reference to the accompanying drawings and in combination with preferred embodiments.
[0049] Concept definitions and theorems:
[0050] Definition 1: The space size of an IP address prefix P |P| is the number of IP addresses it can match (cover), and the space size of a set PS composed of multiple IP address prefixes |PS| is the IP address matched by all prefixes in the set When there is no overlapping IP address space between all the prefixes in the set, the PS space size of the set is the sum of the sizes of the prefix spaces in the set.
[0051] For example, the IP address prefix 59.78.45.* (* means that the last 8 digits are arbitrary) covers 256 IP addresses, so |59.78.45.*|=256; another example, the IP address prefix 59.78.45.1 covers 1 IP The address is itself, so |59.78.45.1|=1.
[0052] Definition 2: For an IP address set IS, the combination of K IP address prefixes that cover the set IS with the sm...
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