11-15-2004 04:12 PM - edited 03-02-2019 07:58 PM
Hello,
Can someone explain the burst field in policing traffic on a 4k switch a little bit better than the Cisco's QoS documentations?
For example If I want to police a 100 meg fastethernet port down to only allow 1 meg of traffic, I can use the following config in conjunction with other QOS commands.
police 1 mbps 128 kbyte conform-action transmit exceed-action drop
However, my biggest question is, how do I determine the value for the second field? (in the example above it is 128kbyte)
I have been playing with values in the lab and I find that if I make the burst too small I can't get any traffic across. I am currently setting the burst to about 10% of the set bandwidth. It seems to be ok, but I would like a little bit more explaination on what exactly is going on. Thanks for everyone's help.
Thanks
Min
11-19-2004 02:33 PM
A good value for burst can be equal to twice the amount of traffic sent with Round trip time.
You can get better undersatnding from the below link too
11-19-2004 04:29 PM
Burst = 2 * .001 * 1000000 = 2000
police 1mbps 2kbyte conform-action transmit exceed-action drop
If I put 2k for burst FTP will never work.
Why??
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