Shared rate limiters using floating buckets

Details Shared rate limiters using floating buckets Shared rate limiters using floating buckets

2011-08-16

2011-08-16

Harper, Kevin C (Department: 2462)

Multiplex communications

Data flow congestion prevention or control

Flow control of data transmission through a network

Reexamination Certificate

active

08000244

ABSTRACT:
Traffic flow rate limits are enforced in an Intrusion Prevention System (IPS) having a plurality of deep packet inspection (DPI) engines by using a floating token bucket scheme. The IPS includes a plurality of rate limiters which are associated with different classes (e.g., protocols) of traffic. A floating token bucket is associated with each rate limiter. The token bucket associated with a rate limiter is passed from DPI engine to DPI engine. Only the DPI engine currently in possession of the token bucket for a particular rate limiter is allowed to process traffic of the class associated with that rate limiter. A DPI engine is only allowed to process traffic associated with a token bucket in its possession if that token bucket is not empty. Use of such floating token buckets enforces rate limits for each traffic class across the multiple DPI engine.

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