Andy Furniss wrote:
Jonathan Lynch wrote:
If the ceil is based at IP level then the max ceil is going to be a
value between 54 Mbit and 97 Mbit (not the tc values) for a 100 Mbit
interface depending on the size of the packets passing through, right ?
Minimum Ethernet frame
148,809 * (46 * 8) = 148,809 * 368 = 54,761,712 Mbps
Maximum Ethernet frame
8,127 * (1500 * 8) = 8,127 * 12,000 = 97,524,000 Mbps
If you use the overhead option I think you will be to overcome this
limitation and push the rates closer to 100mbit.
I looked up ethernet overheads and found the figure of 38 bytes per
frame, the 46 is min eth payload size? and looking at the way mpu is
handled by the tc rate table generator I think you would need to use 46
+ 38 as mpu.
So on every htb line that has a rate put ..... overhead 38 mpu 84
I haven't checked those figures or tested close to limits though, the
12k burst would need increasing a bit aswell or that will slightly over
limit rate at HZ=1000.
Andy.
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