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After I typed the following police command for a type qos class on a Cisco Nexus 7000 switch:

police cir 8 kbps pir 8 kbps

I get the following message:

Note: pir/max-burst ignored

Can someone explain why PIR is ignored?

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Because the 7K has a hard policer. There is no notion of peak vs committed rates. Once you pass the CIR it will start dropping packets.

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I'm sorry, but this is blatantly wrong. The 7k supports a 3-color policer – Mike Pennington Aug 2 '12 at 14:17
My answer isn't clear enough about it, but the command he specified is one rate / two color - which means that it's a hard policer. It breaks cir and it's a violation. It -supports- 3-color (i.e. pir value) but it doesn't necessarily have to be configured as such. – rnxrx Aug 2 '12 at 23:30

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