Or from my law for implement RED you can go with
# /sbin/tc qdisc add dev <eth0> parent 10:<2000> red max <64000> min 1500 \
limit <64kb> avpkt 1000 burst 20
here,
parameters in <> are variable and leave rest as it is
I assume you wana shapping of 64kb
2000 is id
parameter to max is (64 * 1000)
-----Original Message-----
From: bert hubert <ahu@ds9a.nl>
To: Arindam Haldar <ahiam@yahoo.com>
Cc: lartc@mailman.ds9a.nl
Subject: Re: [LARTC] RED problem !
On Tue, Jan 01, 2002 at 10:33:06PM +0530, Arindam Haldar wrote:
> hi all,
>
> while trying red inplace of sfq/pfifo i go the follwing error
>
> tc qdisc add dev eth0 parent 1:470 red max 12288 min 6100 limit 12288
> avpkt 1514 burst 2
This returns -1:
int tc_red_eval_ewma(unsigned qmin, unsigned burst, unsigned avpkt)
{
int wlog = 1;
double W = 0.5;
double a = (double)burst + 1 - (double)qmin/avpkt;
if (a < 1.0)
return -1;
for (wlog=1; wlog<32; wlog++, W /= 2) {
if (a <= (1 - pow(1-W, burst))/W)
return wlog;
}
return -1;
}
You can use this to calculate what is wrong. Either burst+1-qmin/avpkt is
smaller than 1, or a is too high to be matched by a time constant.
