Re: [Cake] overhead and mpu

2017-09-05 Thread Ryan Mounce
On 6 September 2017 at 05:49, Dennis Fedtke wrote: > Hi! > > Thank you for all answers. > But for me this still makes no sense. > Assuming we have an ethnernet connection running over a docsis line. > docsis is able to transmit full 1500byte ethernet packets. > Lets say it is an 50 Mbit/s Line. (I

Re: [Cake] overhead and mpu

2017-09-05 Thread Dennis Fedtke
Hi! Thank you for all answers. But for me this still makes no sense. Assuming we have an ethnernet connection running over a docsis line. docsis is able to transmit full 1500byte ethernet packets. Lets say it is an 50 Mbit/s Line. (I dont know now how exactly docsis works) So to reach the 50Mbit/

Re: [Cake] overhead and mpu

2017-09-05 Thread Kevin Darbyshire-Bryant
On 05/09/17 15:37, Ryan Mounce wrote: +1 It would also be nice for tc to know whether the overhead has been explicitly configured and report appropriately. In my case I use cake on a VLAN sub-interface that happens to have a hard_header_len of 18 after the 802.1q tag, and then use the docsis

Re: [Cake] overhead and mpu

2017-09-05 Thread Sebastian Moeller
Hi Ryan, > On Sep 5, 2017, at 16:37, Ryan Mounce wrote: > > On 5 September 2017 at 18:28, Sebastian Moeller wrote: >> Hi Kevin, >> >> >>> On Sep 5, 2017, at 10:35, Kevin Darbyshire-Bryant >>> wrote: >>> >>> >>> >>> On 05/09/17 09:01, Sebastian Moeller wrote: >>> I believe this

Re: [Cake] overhead and mpu

2017-09-05 Thread Ryan Mounce
On 5 September 2017 at 18:28, Sebastian Moeller wrote: > Hi Kevin, > > >> On Sep 5, 2017, at 10:35, Kevin Darbyshire-Bryant >> wrote: >> >> >> >> On 05/09/17 09:01, Sebastian Moeller wrote: >> >>> I believe this is used internally so cake can deduce the size of the >>> automatically added

Re: [Cake] overhead and mpu

2017-09-05 Thread Sebastian Moeller
Hi Kevin, > On Sep 5, 2017, at 10:35, Kevin Darbyshire-Bryant > wrote: > > > > On 05/09/17 09:01, Sebastian Moeller wrote: > >> I believe this is used internally so cake can deduce the size of the >> automatically added overhead (the linux kernel will add 14 bytes on ethernet >> inte

Re: [Cake] overhead and mpu

2017-09-05 Thread Kevin Darbyshire-Bryant
On 05/09/17 09:01, Sebastian Moeller wrote: I believe this is used internally so cake can deduce the size of the automatically added overhead (the linux kernel will add 14 bytes on ethernet interfaces automatically, which while certainly justifiable are not the ideal value for an et

Re: [Cake] overhead and mpu

2017-09-05 Thread Sebastian Moeller
Hi Dennis, > On Sep 5, 2017, at 08:00, Dennis Fedtke wrote: > > Hi Ryan, > > Thanks for you answers. > Lets assume again ethernet over docsis connection at 50 Mbit/s. As the other's already mentioned, on DOCSIS it is customary to lie to the customer regarding the provisioned bandwidt