HTB a ping

[oldfrog.linux na volny.cz]

Rybarik, Michal wrote:

>>mam problem u jednoho routeru s HTB. Situace je takova ze za 
>>nim jsou schovane 
>>(resp. maskaradovane) 2 site (kazda na jine sitovce, linka do 
>>inetu je 
>>spolecna) - 1. potrebuje co nejmensi pingy (hraje se hlavne 
>>csko) a na 2. 
>>jsou stahovaci. HTB vse omezuje k me spokojenosti, ale at 
>>delam co delam tak 
>>    
>>
>
>pozrite si http://lartc.org/wondershaper/, su tam dva skripty (pre
>cbq a htb) ktore riesia presne vas problem. slusne zdokumentovane,
>na pochopenie preco to tak funguje je to vyborne. je to sice povodne
>myslene pre adsl userov, ale uspesne ho pouzivam na domacej garantovanej 
>32k linke k plnej spokojnosti.
>
>strucne k funkcnosti, na routeri sa nastavi shaping trochu nizsie nez je
>u providera, takze sa pri dosiahnuti stropu neplnia providerove buffre, 
>ale nase, a v nich mozeme pakety prehadzovat podle libosti, teda pingy a
>ssh pustat prve, male pakety tiez, a az potom ostatny traffic. autor na
>stranke uvadza takuto zmenu (na ADSL):
>
>Before, without wondershaper, while uploading:
>round-trip min/avg/max = 2041.4/2332.1/2427.6 ms
>
>After, with wondershaper, during 220kbit/s upload:
>round-trip min/avg/max = 15.7/51.8/79.9 ms 
>
>a ja to na svojej pomalej linke mozem potvrdit.
>
>p
>

Potvrzuji jiz jednou recene:

1) hlavni tride pridelte trosku mensi propustnost nez mate
ve skutecnosti (aby se feronta tvorila u Vas a ne dale na lince)

2) pro low-latenci provoz si zridte zvlasti tridy s vyssi prioritou
(s nizsim cislem), ktera nebude zatezovana zadnym jinym provozem

Pri volne lince mam

on na oldfrog:~ $ ping www.root.cz
PING centaurus.4web.cz (81.31.5.5) from 192.168.1.10 : 56(84) bytes of data.
64 bytes from centaurus.4web.cz (81.31.5.5): icmp_seq=1 ttl=59 time=13.6 ms
64 bytes from centaurus.4web.cz (81.31.5.5): icmp_seq=2 ttl=59 time=12.9 ms
64 bytes from centaurus.4web.cz (81.31.5.5): icmp_seq=3 ttl=59 time=11.9 ms
64 bytes from centaurus.4web.cz (81.31.5.5): icmp_seq=4 ttl=59 time=15.6 ms
64 bytes from centaurus.4web.cz (81.31.5.5): icmp_seq=5 ttl=59 time=12.6 ms
64 bytes from centaurus.4web.cz (81.31.5.5): icmp_seq=6 ttl=59 time=13.2 ms
64 bytes from centaurus.4web.cz (81.31.5.5): icmp_seq=7 ttl=59 time=14.4 ms
64 bytes from centaurus.4web.cz (81.31.5.5): icmp_seq=8 ttl=59 time=19.3 ms
64 bytes from centaurus.4web.cz (81.31.5.5): icmp_seq=9 ttl=59 time=14.6 ms
64 bytes from centaurus.4web.cz (81.31.5.5): icmp_seq=10 ttl=59 time=12.3 ms

Pri plne zatizene lince

on na oldfrog:~ $ ping www.root.cz
PING centaurus.4web.cz (81.31.5.5) from 192.168.1.10 : 56(84) bytes of data.
64 bytes from centaurus.4web.cz (81.31.5.5): icmp_seq=2 ttl=59 time=12.9 ms
64 bytes from centaurus.4web.cz (81.31.5.5): icmp_seq=3 ttl=59 time=25.7 ms
64 bytes from centaurus.4web.cz (81.31.5.5): icmp_seq=4 ttl=59 time=14.4 ms
64 bytes from centaurus.4web.cz (81.31.5.5): icmp_seq=5 ttl=59 time=24.1 ms
64 bytes from centaurus.4web.cz (81.31.5.5): icmp_seq=7 ttl=59 time=13.1 ms
64 bytes from centaurus.4web.cz (81.31.5.5): icmp_seq=8 ttl=59 time=13.1 ms
64 bytes from centaurus.4web.cz (81.31.5.5): icmp_seq=9 ttl=59 time=25.0 ms
64 bytes from centaurus.4web.cz (81.31.5.5): icmp_seq=11 ttl=59 time=39.0 ms
64 bytes from centaurus.4web.cz (81.31.5.5): icmp_seq=12 ttl=59 time=49.8 ms

--- centaurus.4web.cz ping statistics ---
12 packets transmitted, 9 received, 25% loss, time 11095ms
rtt min/avg/max/mdev = 12.922/24.165/49.838/12.246 ms

Hlavni trida ma nastaveno 248kbps, skutecna linka ma 256kbps.

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Ondrej Nemecek
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