Potom sledi moj odgovor:
Pozdrav,
Hvala na trudu oko mog prikljucka. Kako bih objasnio problem, pre nekih mesec dana su na cvoristu koje je vezano za moj priljkucak vrseni radovi u roku od cca 5 dana. Posle toga su krenuli problemi sa pingom, bar ono sto ja vidim kao problem (oko 15. marta). Pre toga, ping ka googleu je bio ispod 10 sek i ping na speedtestu je bio znatno manji. Sada, i speedtest na vasem serveru daje rezultat od 10ms. Dakle od kada su uradjene promene na nekom cvoristu tog datuma, imam problema sa tim. Zamena HGWa za modem je smanjila problem ali nije eleminisala. Svuda gde imam izlaz na internet putem bg-tp-m-0-be13.sbb.rs, vecina kasnjenja je na nivou SBB mreze. Na primer, ping do Google servera u Budimpesti je prosecno 13ms, dok je do poslednjeg hopa u SBB mrezi ping sa ogromnim varijacijama, i otprilike od izlaza sa SBB mreze do googlea u Budimpesti imam isti broj hopova kao i na njoj:
[root@nidza ~]# traceroute -I google.com
traceroute to google.com (216.58.209.206), 30 hops max, 60 byte packets
1 10.0.0.1 (10.0.0.1) 7.720 ms 7.602 ms 8.333 ms
2 10.0.0.1 (10.0.0.1) 8.303 ms 12.169 ms 12.144 ms
3 bg-bg-m-2-pc3.sbb.rs (89.216.4.0) 12.842 ms 12.818 ms 12.792 ms
4 bg-he-m-1-te7-1.sbb.rs (89.216.5.97) 12.750 ms 12.723 ms 12.699 ms
5 bg-tp-m-0-be13.sbb.rs (89.216.6.96) 13.536 ms 13.510 ms 13.482 ms
6 72.14.219.230 (72.14.219.230) 16.990 ms 12.899 ms 12.787 ms
7 209.85.243.121 (209.85.243.121) 13.276 ms 13.979 ms 13.941 ms
8 66.249.94.113 (66.249.94.113) 13.948 ms 18.526 ms 18.487 ms
9 bud02s22-in-f14.1e100.net (216.58.209.206) 17.580 ms 17.544 ms 17.464 ms
Ne znam zasto sada do prvog mreznog uredjaja imam ping ~7ms a do izlaza sa SBB mreze 13ms, kada do pre mesec dana nije bilo tako?
Evo sa SBB mreze, tj. moje konekcije ka izlasku:
[root@nidza ~]# ping -c 100 -i 0.1 89.216.6.96
PING 89.216.6.96 (89.216.6.96) 56(84) bytes of data.
64 bytes from 89.216.6.96: icmp_seq=1 ttl=252 time=8.97 ms
64 bytes from 89.216.6.96: icmp_seq=2 ttl=252 time=12.1 ms
64 bytes from 89.216.6.96: icmp_seq=3 ttl=252 time=11.1 ms
64 bytes from 89.216.6.96: icmp_seq=4 ttl=252 time=10.0 ms
64 bytes from 89.216.6.96: icmp_seq=5 ttl=252 time=8.96 ms
64 bytes from 89.216.6.96: icmp_seq=6 ttl=252 time=8.04 ms
64 bytes from 89.216.6.96: icmp_seq=7 ttl=252 time=11.4 ms
64 bytes from 89.216.6.96: icmp_seq=8 ttl=252 time=10.1 ms
64 bytes from 89.216.6.96: icmp_seq=9 ttl=252 time=9.00 ms
64 bytes from 89.216.6.96: icmp_seq=10 ttl=252 time=12.1 ms
64 bytes from 89.216.6.96: icmp_seq=11 ttl=252 time=10.9 ms
64 bytes from 89.216.6.96: icmp_seq=12 ttl=252 time=10.1 ms
64 bytes from 89.216.6.96: icmp_seq=13 ttl=252 time=10.3 ms
64 bytes from 89.216.6.96: icmp_seq=14 ttl=252 time=9.50 ms
64 bytes from 89.216.6.96: icmp_seq=15 ttl=252 time=8.73 ms
64 bytes from 89.216.6.96: icmp_seq=16 ttl=252 time=8.49 ms
64 bytes from 89.216.6.96: icmp_seq=17 ttl=252 time=7.34 ms
64 bytes from 89.216.6.96: icmp_seq=18 ttl=252 time=10.3 ms
64 bytes from 89.216.6.96: icmp_seq=19 ttl=252 time=9.15 ms
64 bytes from 89.216.6.96: icmp_seq=20 ttl=252 time=8.37 ms
64 bytes from 89.216.6.96: icmp_seq=21 ttl=252 time=11.2 ms
64 bytes from 89.216.6.96: icmp_seq=22 ttl=252 time=10.2 ms
64 bytes from 89.216.6.96: icmp_seq=23 ttl=252 time=10.4 ms
64 bytes from 89.216.6.96: icmp_seq=24 ttl=252 time=7.91 ms
64 bytes from 89.216.6.96: icmp_seq=25 ttl=252 time=7.20 ms
64 bytes from 89.216.6.96: icmp_seq=26 ttl=252 time=10.1 ms
64 bytes from 89.216.6.96: icmp_seq=27 ttl=252 time=9.16 ms
64 bytes from 89.216.6.96: icmp_seq=28 ttl=252 time=8.84 ms
64 bytes from 89.216.6.96: icmp_seq=29 ttl=252 time=7.61 ms
64 bytes from 89.216.6.96: icmp_seq=30 ttl=252 time=11.2 ms
64 bytes from 89.216.6.96: icmp_seq=31 ttl=252 time=10.1 ms
64 bytes from 89.216.6.96: icmp_seq=32 ttl=252 time=9.15 ms
64 bytes from 89.216.6.96: icmp_seq=33 ttl=252 time=12.0 ms
64 bytes from 89.216.6.96: icmp_seq=34 ttl=252 time=11.2 ms
64 bytes from 89.216.6.96: icmp_seq=35 ttl=252 time=10.1 ms
64 bytes from 89.216.6.96: icmp_seq=36 ttl=252 time=9.20 ms
64 bytes from 89.216.6.96: icmp_seq=37 ttl=252 time=12.2 ms
64 bytes from 89.216.6.96: icmp_seq=38 ttl=252 time=11.1 ms
64 bytes from 89.216.6.96: icmp_seq=39 ttl=252 time=10.1 ms
64 bytes from 89.216.6.96: icmp_seq=40 ttl=252 time=9.10 ms
64 bytes from 89.216.6.96: icmp_seq=41 ttl=252 time=12.0 ms
64 bytes from 89.216.6.96: icmp_seq=42 ttl=252 time=11.0 ms
64 bytes from 89.216.6.96: icmp_seq=43 ttl=252 time=9.81 ms
64 bytes from 89.216.6.96: icmp_seq=44 ttl=252 time=9.00 ms
64 bytes from 89.216.6.96: icmp_seq=45 ttl=252 time=12.1 ms
64 bytes from 89.216.6.96: icmp_seq=46 ttl=252 time=10.9 ms
64 bytes from 89.216.6.96: icmp_seq=47 ttl=252 time=14.0 ms
64 bytes from 89.216.6.96: icmp_seq=48 ttl=252 time=9.76 ms
64 bytes from 89.216.6.96: icmp_seq=49 ttl=252 time=21.2 ms
64 bytes from 89.216.6.96: icmp_seq=50 ttl=252 time=11.8 ms
64 bytes from 89.216.6.96: icmp_seq=51 ttl=252 time=11.2 ms
64 bytes from 89.216.6.96: icmp_seq=52 ttl=252 time=10.1 ms
64 bytes from 89.216.6.96: icmp_seq=53 ttl=252 time=8.97 ms
64 bytes from 89.216.6.96: icmp_seq=54 ttl=252 time=12.0 ms
64 bytes from 89.216.6.96: icmp_seq=55 ttl=252 time=11.1 ms
64 bytes from 89.216.6.96: icmp_seq=56 ttl=252 time=10.1 ms
64 bytes from 89.216.6.96: icmp_seq=57 ttl=252 time=9.25 ms
64 bytes from 89.216.6.96: icmp_seq=58 ttl=252 time=16.1 ms
64 bytes from 89.216.6.96: icmp_seq=59 ttl=252 time=11.2 ms
64 bytes from 89.216.6.96: icmp_seq=60 ttl=252 time=10.1 ms
64 bytes from 89.216.6.96: icmp_seq=61 ttl=252 time=9.49 ms
64 bytes from 89.216.6.96: icmp_seq=62 ttl=252 time=9.08 ms
64 bytes from 89.216.6.96: icmp_seq=63 ttl=252 time=12.0 ms
64 bytes from 89.216.6.96: icmp_seq=64 ttl=252 time=11.2 ms
64 bytes from 89.216.6.96: icmp_seq=65 ttl=252 time=10.2 ms
64 bytes from 89.216.6.96: icmp_seq=66 ttl=252 time=9.06 ms
64 bytes from 89.216.6.96: icmp_seq=67 ttl=252 time=20.3 ms
64 bytes from 89.216.6.96: icmp_seq=68 ttl=252 time=11.2 ms
64 bytes from 89.216.6.96: icmp_seq=69 ttl=252 time=10.1 ms
64 bytes from 89.216.6.96: icmp_seq=70 ttl=252 time=9.17 ms
64 bytes from 89.216.6.96: icmp_seq=71 ttl=252 time=8.10 ms
64 bytes from 89.216.6.96: icmp_seq=72 ttl=252 time=11.2 ms
64 bytes from 89.216.6.96: icmp_seq=73 ttl=252 time=10.2 ms
64 bytes from 89.216.6.96: icmp_seq=74 ttl=252 time=9.01 ms
64 bytes from 89.216.6.96: icmp_seq=75 ttl=252 time=8.27 ms
64 bytes from 89.216.6.96: icmp_seq=76 ttl=252 time=10.9 ms
64 bytes from 89.216.6.96: icmp_seq=77 ttl=252 time=10.0 ms
64 bytes from 89.216.6.96: icmp_seq=78 ttl=252 time=9.39 ms
64 bytes from 89.216.6.96: icmp_seq=79 ttl=252 time=8.11 ms
64 bytes from 89.216.6.96: icmp_seq=80 ttl=252 time=10.9 ms
64 bytes from 89.216.6.96: icmp_seq=81 ttl=252 time=10.0 ms
64 bytes from 89.216.6.96: icmp_seq=82 ttl=252 time=9.59 ms
64 bytes from 89.216.6.96: icmp_seq=83 ttl=252 time=12.9 ms
64 bytes from 89.216.6.96: icmp_seq=84 ttl=252 time=8.23 ms
64 bytes from 89.216.6.96: icmp_seq=85 ttl=252 time=11.1 ms
64 bytes from 89.216.6.96: icmp_seq=86 ttl=252 time=10.1 ms
64 bytes from 89.216.6.96: icmp_seq=87 ttl=252 time=10.2 ms
64 bytes from 89.216.6.96: icmp_seq=88 ttl=252 time=9.03 ms
64 bytes from 89.216.6.96: icmp_seq=89 ttl=252 time=12.3 ms
64 bytes from 89.216.6.96: icmp_seq=90 ttl=252 time=11.2 ms
64 bytes from 89.216.6.96: icmp_seq=91 ttl=252 time=10.1 ms
64 bytes from 89.216.6.96: icmp_seq=92 ttl=252 time=9.51 ms
64 bytes from 89.216.6.96: icmp_seq=93 ttl=252 time=8.55 ms
64 bytes from 89.216.6.96: icmp_seq=94 ttl=252 time=10.9 ms
64 bytes from 89.216.6.96: icmp_seq=95 ttl=252 time=10.3 ms
64 bytes from 89.216.6.96: icmp_seq=96 ttl=252 time=9.24 ms
64 bytes from 89.216.6.96: icmp_seq=97 ttl=252 time=8.51 ms
64 bytes from 89.216.6.96: icmp_seq=98 ttl=252 time=8.74 ms
64 bytes from 89.216.6.96: icmp_seq=99 ttl=252 time=8.20 ms
64 bytes from 89.216.6.96: icmp_seq=100 ttl=252 time=11.1 ms
--- 89.216.6.96 ping statistics ---
100 packets transmitted, 100 received, 0% packet loss, time 9989ms
rtt min/avg/max/mdev = 7.203/10.355/21.230/2.079 ms
Da li su normalne tolike varijacije u lokalu, u Beogradu, na vasim mreznim uredjajima? Dakle ovo je pre izlaska na internet. Od 7 do 21ms, na nivou od 10sek, namerno testirano sa 10req/sec jer vecina aplikacija ne salje jedan zahtev po sec? Kada povecam broj zahteva po sec, varijacije budu dosta vece. Znam da ICMP podaci nemaju prioritet, i traceroute radim isto preko -I, ali mi nije jasno zasto se posle intervencije od pre mesec dana ping toliko promenio, kao i njegove varijacije.
Da li je onda ovaj broj normalan? Posto kao sto rekoh, sa eksterne mreze nemam problema pri pingu svog treceg hopa, a ka petom imam, sto se vidi i po slikama. Ping sa VDSLa ka googleu/HU je takodje potpuno stabilan, sa varijacijama od 1ms. Traceroute mogu da radim ka bilo kom serveru, ali opet moram da prodjem izlaz na 89.216.6.96, koji remeti ping.
Ono sto je fascinantno je da je ping ka mom trecem hopu manji sa Tel Srb VDSLa nego sa moje mreze koja bi trebalo da bude lokalna.
Hvala,
Nikola Stojisavljevic
--------------------------
Interesuje me vase misljenje, da li od muve pravim magarca ili nesto stvarno ne valja... jer sav izlaz na internet mi ide preko tog cvorista koje reaguje na ping ko loto kuglice da se izvlace.
THE ONLY EASY DAY WAS YESTERDAY