I Need to restrict upload speed with my 3560 and I'm going to do it with policy maps. If I want to configure interface so that it would have upload speed of 4Mbps what would be a good burst size? I planned to do it like this:
class-map match-all rate-limit
match ip dscp default
police 4096000 192000 exceed-action drop
I also need to make an interface where upload speed would be 30 Mbps what would be a good burst size for that? Should it be a lot higher? If so why?
Re: The meaning of burst size in policy map config?
burst size with a single rate policer is needed because of a small "issue". The point is: no sender can send a frame at 4 Mbps, when the line speed is f.e. 100 Mbps. Frames are always sent with line speed.
So the policer needs to be configured with a value defining for how long it is OK to send above the defined rate (to burst) - one frame (at least!), two frames, several kBytes, etc.
As the name implies, this defines the "burstiness" of the accepted traffic. The defined policer rate is the "long term average". The burst value defines what "long term" means.
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