[Cake] overhead and mpu

[Dennis Fedtke]

Hi!

I forgot to ask why max_len shows 1514 and not 1518 in the output of tc?

Thanks.


Am 07.09.2017 um 06:11 schrieb Dennis Fedtke:
> Hi everyone!
>
> thanks for your answers again.
>
> So what about from should i expect from using the docsis keyword?
> (This layer cake script + nat docsis set in advanced config)
>
> tc -s qdisc show dev eth1.100:
> qdisc cake 8064: root refcnt 2 bandwidth 19Mbit diffserv3 
> triple-isolate nat rtt 100.0ms raw mpu 64
>  Sent 246233450 bytes 1316430 pkt (dropped 65, overlimits 126706 
> requeues 0)
>  backlog 0b 0p requeues 0
>  memory used: 2372672b of 4Mb
>  capacity estimate: 19Mbit
>                  Bulk   Best Effort      Voice
>   thresh      1187Kbit      19Mbit    4750Kbit
>   target        15.3ms       5.0ms       5.0ms
>   interval     110.3ms     100.0ms      10.0ms
>   pk_delay         0us       298us        10us
>   av_delay         0us        13us         2us
>   sp_delay         0us         1us         1us
>   pkts               0     1315692         803
>   bytes              0   246260830       59314
>   way_inds           0         733           0
>   way_miss           0        5012          29
>   way_cols           0           0           0
>   drops              0          65           0
>   marks              0           0           0
>   sp_flows           0           1           0
>   bk_flows           0           0           0
>   un_flows           0           0           0
>   max_len            0        1514         405
>
> tc -s qdisc show dev ifb4eth1.100
> qdisc cake 8065: root refcnt 2 bandwidth 150Mbit diffserv3 
> triple-isolate nat wash rtt 100.0ms noatm overhead 18 via-ethernet mpu 64
>  Sent 869520280 bytes 2153104 pkt (dropped 30, overlimits 270811 
> requeues 0)
>  backlog 0b 0p requeues 0
>  memory used: 624320b of 7500000b
>  capacity estimate: 150Mbit
>                  Bulk   Best Effort      Voice
>   thresh      9375Kbit     150Mbit   37500Kbit
>   target         5.0ms       5.0ms       5.0ms
>   interval     100.0ms     100.0ms      10.0ms
>   pk_delay       121us       448us         1us
>   av_delay        40us       158us         0us
>   sp_delay         2us         2us         0us
>   pkts           58805     1362429      731900
>   bytes       77433974   748216627    43914060
>   way_inds           0      118167           0
>   way_miss           5        5911           3
>   way_cols           0           0           0
>   drops              1          29           0
>   marks              0           0           0
>   sp_flows           0           0           0
>   bk_flows           0           0           1
>   un_flows           0           0           0
>   max_len         1486        1514          90
>
> Why is there no overhead showing for egress?
> Why is there overhead18 + via-ethernet showing for ingress?
>
> Thanks again =)
>