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QoS Policing & Shaping

Shaping and Policing is a Traffic Condition Technique comes under QoS PHB. Both is used to rate limit traffic on a interface or sub-interface to adhere to a traffic contract or to restrict further congestion of traffic down to the remaining network devices. The way shaping and policing rate-limit traffic is different in a way that shaping buffer the the traffic exceeding a certain bit-rate unlike policing drop the exceeding bit-rate. Shaping A network device buffer packet in it’s output queue to slow down the rate of transmission and decrease the bit-rate. It does so by sending some packets then hold on for some moments and then send some packets again, so on and so fourth. Device uses it’s processor clock rate to achieve the goal. The purpose of shaping is to provide a CIR(committed information rate) without dropping packets. For example a serial link has a 128Kbps of physical […]

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