Re: tbf token help

Damion de Soto
Wed, 23 Jun 2004 00:01:35 -0000

Have you fully read:
http://lartc.org/howto/lartc.qdisc.classless.html#AEN691
?
most of it is explained in there.

> 1) What unit is token? Is "1 token = 1 byte" ?
>     If this is so, then with rate=0.5mbit and HZ=100 the bucket gets filled
>     with 0,64kb (655 tokens) every 10ms?
1 token is one packet.

> 2) How much tokens are used for one packet (1500)?
1

> 3) And token unrelated question. Does packet droping alway ocurrs or
>     it happens because of bad settings?
>
>     I have applied this settings on 10mbit ethernet card:
>     tc qdisc add dev eth1 root tbf rate 0.5mbit burst 5kb latency 70ms /
>     peakrate 1mbit minburst 1540
>
>    Result:
>    qdisc tbf 8007: dev eth1 rate 512Kbit burst 5Kb/8 mpu 0b peakrate 1Mbit
mtu
>    1539b/8 mpu 0b lat 68.4ms
>    Sent 1284481 bytes 852 pkts (dropped 48, overlimits 1743)
Packet dropping happens when too much data is coming in.
See the explanation in the link above.

regards,

--
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