Abstract:Timely deletion of a large number of stale sessions monitored by Internet routers, particularly in the presence of SYN floods, is critical to prevent flow table explosion. We investigate two frameworks for purging of stale sessions: "opportunistic" purging that employs a free-list of pointers to memory and "deterministic purging" involving logical swapping of a 1-bit flow enable and touch-bit vectors without requiring a free list. We compare the performance of our algorithms with a stateof-the-art algorithm, n… Show more
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