how RED should work ?

[Salatiel Filho]

Hi , i am trying to understand how RED queue discipline works but i am
having a few troubles.

The parameters are MIN , MAX , LIMIT , BURST

I put LIMIT = 64Kb, so if i am not wrong it should PDROP anything over
this value , right ?
i put MIN = 8Kb , so no drops at all below this value, right ?
i put MAX = 16Kb, starts to early drop anything above this using probability P.
I put probability at 0.5 [very high , just for test]
i PUT burst at 20 [actually , no idea what really put in here]

but after a while downloading at full speed i still get no drops at
all. Using 50% probability i should get at least 1 early drop shouldnt
i ?

qdisc red 3: limit 64Kb min 8Kb max 16Kb
Sent 5023410 bytes 3817 pkts (dropped 0, overlimits 0)
marked 0 early 0 pdrop 0 other 0

[Andy Furniss]

Post by Salatiel Filho
Hi , i am trying to understand how RED queue discipline works but i am
having a few troubles.
The parameters are MIN , MAX , LIMIT , BURST
I put LIMIT = 64Kb, so if i am not wrong it should PDROP anything over
this value , right ?
i put MIN = 8Kb , so no drops at all below this value, right ?
i put MAX = 16Kb, starts to early drop anything above this using probability P.
I put probability at 0.5 [very high , just for test]
i PUT burst at 20 [actually , no idea what really put in here]
but after a while downloading at full speed i still get no drops at
all. Using 50% probability i should get at least 1 early drop shouldnt
i ?
qdisc red 3: limit 64Kb min 8Kb max 16Kb
Sent 5023410 bytes 3817 pkts (dropped 0, overlimits 0)
marked 0 early 0 pdrop 0 other 0

RED doesn't rate limit by its self so you need to make it a child of
htb/tbf/hfsc.

Andy.