COMMUNICATION NODE, COMMUNICATION SYSTEM, PACKET PROCESSING METHOD AND PROGRAM

摘要

A communication node(s) in a centralized-control-type network is allowed to change an instruction(s) (control information) given by a control apparatus(es) without querying the control apparatus(es) every time or previously arranging an alternative flow entry(ies) for failure recovery in a flow table. The communication node includes: a packet processing unit which processes received packets by referring to a first table(s) that stores an entry(ies) defining match conditions against which the received packets are matched and a processing content(s) applied to packets that match the match conditions; and an autonomous operation unit which refers to a second table(s) in which an event(s) is associated with a change(s) applied to an entry(ies) stored in the first table(s) when occurrence of the event(s) is detected and which rewrites an entry(ies) in the first table(s) on the basis of an event(s) that has occurred.