[Bloat] About Setting Bandwidth limit with or without ethernet overhead?

[Sebastian Moeller]

Dear Y.

Okay could you please post the full defaults.sh then as I assume this to configure sqm.
Also the output of
tc -s qdisc
tc -d qdisc
Would be interesting.

Best Regards


On November 7, 2018 4:06:52 PM PST, Y <intruder_tkyf at yahoo.fr> wrote:
>moeee :)
>
>I don't use openwrt.
>Maybe, so I cannot find /etc/config/sqm on my pc. 
>But I use sqmscript with below setting.
>
>UPLINK=815 # 98% of linkspeed
>DOWNLINK=11603 # 98% of linkspeed
>SCRIPT=simple.qos
>LINKLAYER=atm
>OVERHEAD=-4
>EECN=NOECN
>
>Thanks.
>Yutaka.
>
>
>On Wed, 7 Nov 2018 15:21:24 -0800
>Sebastian Moeller <moeller0 at gmx.de> wrote:
>
>> Hi Y,
>> 
>> when you shape for an ATM link you absolutely nned to set the
>> linklayer to ATM. If you use openwrt why don't you post the contents
>> of "cat /etc/config/sqm"
>> here and we can go over it line by line?
>> 
>> Best Regards
>> 	Sebastian
>> 
>> > On Nov 7, 2018, at 14:13, Y <intruder_tkyf at yahoo.fr> wrote:
>> > 
>> > I am sorry. Dave.
>> > 
>> > My actual speed with this setting , almost expected .
>> > Around 90kbytes per second actual speed = 810kbit per second actual
>> > setting speed * 48/53 considering atm connection. 
>> > This settled speed doesn't include ethernet framing.
>> > 
>> > Maybe , 
>> > Bandwidth = without ethernet overhead
>> > tc-stab overhead = -14 
>> > is correct.
>> > 
>> > Thank you .
>> > 
>> > On Thu, 8 Nov 2018 06:48:30 +0900
>> > Y <intruder_tkyf at yahoo.fr> wrote:
>> >   
>> >> Hi , Dave
>> >> Thank you for your reply.
>> >> 
>> >> I should show you tc-stab setting.
>> >> 
>> >> My connection is PPPoA via ethernet. PC connects ethernet
>directly.
>> >> 
>> >> ####stab linklayer atm overhead -4
>> >> 
>> >> I add PPPoA overhead 10 + Ethernet overhead -14 = -4
>> >> But, settled Bandwith is 98% of link speed ( I mean this is
>> >> settled bandwidth without ethernet overhead).
>> >> 
>> >> I should shape more?
>> >> 
>> >> Thanks.
>> >> 
>> >> On Wed, 07 Nov 2018 11:28:47 -0800
>> >> Dave Taht <dave at taht.net> wrote:
>> >>   
>> >>> Y <intruder_tkyf at yahoo.fr> writes:
>> >>>   
>> >>>> Hi, I am Yutaka.
>> >>>> 
>> >>>> I connect internet via ethenet.	
>> >>>> Shoud I set Bandwidth limit with or without ethernet overhead in
>> >>>> any qdiscs?
>> >>>> When I measured , It seems setting without ethernet overhead is
>> >>>> correct.      
>> >>> 
>> >>> It depends on your next hop's framing. If you are on ethernet
>> >>> going to ethernet, then you should set ethernet. If you are on
>> >>> ethernet, going through a cablemodem, set docsis. If you are on
>> >>> ethernet, going through dsl or something else, you set the
>framing
>> >>> appropriately.
>> >>> 
>> >>> Without setting the framing appropriately you can run into
>> >>> situations where your shaper can be 60% in accurate (dsl).
>> >>>   
>> >>>> 
>> >>>> Thanks.
>> >>>> _______________________________________________
>> >>>> Bloat mailing list
>> >>>> Bloat at lists.bufferbloat.net
>> >>>> https://lists.bufferbloat.net/listinfo/bloat      
>> >>   
>> > 
>> > _______________________________________________
>> > Bloat mailing list
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>> > https://lists.bufferbloat.net/listinfo/bloat  
>> 

-- 
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