Andreas Hasenack wrote:
On Wed, Mar 01, 2006 at 02:48:18PM +0000, Andy Furniss wrote:
than bulk. Also remember when setting rates that htb will see ip packets
as ip length + 14 when used on ethX
Could you elaborate on this a bit?
I suppose you also meant this in an earlier message when you mentioned
that the overhead was not included in the bw calculations.
Maybe maybe not - There are even more overheads than 14 on eth and I may
also have meant dsl overheads which you need to allow for using patches
because everything gets padded out to a whole number of ATM cells.
As for the IP length + 14, it's because htb uses skb->len and on eth
thats ip+14 on ppp it's just ip length - I don't know about other
interfaces, you can use HTBs counters to test it.
For eth I often see people use 10 or 100mbit as ceils without adding
overheads to HTB - which you can (38-14=24 I suppose), but even then in
practice you need to ceil at slightly less than 10/100mbit.
Andy.
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