[LARTC] simple traffic shaping problem

[LARTC] simple traffic shaping problem

[BAKONYI Péter - paha]

Hi All,

I read the advanced networking howto and find a useful way to shape my 
adsl link.

is says:

"tc qdisc add dev ppp0 root tbf rate 220kbit latency 50ms burst 1500

[...]
Change 220kbit to your uplinks *actual* speed, minus a few percent. If 
you have a really fast modem, raise 'burst' a bit. "

My adsl's upload brandwidth is about 120 kbits/sec, download brandwidth 
is about 384 kbits/sec.

So I use

tc qdisc add dev ppp0 root tbf rate 100kbit latency 50ms burst 1500

but after this command upload falls down to ~20-30 kbita/sec average.
as I see in iptraf, the upload speed can reach the needed 100 kbits/sec 
but it 'hangs' very often.

can you help me with the right parameters?

thank you,

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Re: [LARTC] simple traffic shaping problem

[bert hubert]

On Sun, Feb 03, 2002 at 07:21:43PM +0100, BAKONYI P?ter - paha wrote:

> So I use
> 
> tc qdisc add dev ppp0 root tbf rate 100kbit latency 50ms burst 1500
> 
> but after this command upload falls down to ~20-30 kbita/sec average.
> as I see in iptraf, the upload speed can reach the needed 100 kbits/sec 
> but it 'hangs' very often.

Raise latency too, 50ms*100kbit/sP00bitsb5 bytes, which is somewht less
then a packet. 

> can you help me with the right parameters?

I think this will help, but let us know!

Regards,

bert

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