agnwsta paketa - DOD den douleyei

[Nikos Ladis]

Στις Παρ 26 Οκτ 2001 03:19, γράψατε:
> Geia sas paidia.
>
> Anoigw mia ISDN syndesh me thn Compulink, kanw ligh douleia, kai meta
> kleinw ta panta (apo applications) kai parathrw oti h syndesh (pppd se DOD
> mode) den peftei aytomata. Me ena tcpdump -i ppp0 akoume ta ekshs:
>
> 02:59:54.270466 tc-1-1.compulink.gr > IGRP-ROUTERS.MCAST.net: ip-proto-88
> 40 [tos 0xc0]
> 02:59:54.271986 ppp154-94.compulink.gr.32787 > hermes.compulink.gr.domain:
> 40355+ PTR? 10.0.0.224.in-addr.arpa. (41) (DF)
> 02:59:54.380464 hermes.compulink.gr.domain > ppp154-94.compulink.gr.32787:
> 40355 1/3/4 PTR IGRP-ROUTERS.MCAST.net. (214)
> 02:59:54.380976 ppp154-94.compulink.gr.32787 > hermes.compulink.gr.domain:
> 40356+ PTR? 3.129.242.195.in-addr.arpa. (44) (DF)
> 02:59:54.480464 hermes.compulink.gr.domain > ppp154-94.compulink.gr.32787:
> 40356* 1/3/3 PTR tc-1-1.compulink.gr. (190)
> 02:59:54.480874 ppp154-94.compulink.gr.32787 > hermes.compulink.gr.domain:
> 40357+ PTR? 105.129.242.195.in-addr.arpa. (46) (DF)
> 02:59:54.580466 hermes.compulink.gr.domain > ppp154-94.compulink.gr.32787:
> 40357* 1/3/3 PTR hermes.compulink.gr. (185)
> 02:59:54.580834 ppp154-94.compulink.gr.32787 > hermes.compulink.gr.domain:
> 40358+ PTR? 94.154.242.195.in-addr.arpa. (45) (DF)
> 02:59:54.680465 hermes.compulink.gr.domain > ppp154-94.compulink.gr.32787:
> 40358* 1/3/3 PTR ppp154-94.compulink.gr. (194)
> 02:59:59.230463 tc-1-1.compulink.gr > IGRP-ROUTERS.MCAST.net: ip-proto-88
> 40 [tos 0xc0]
> 03:00:03.520477 tc-1-1.compulink.gr > IGRP-ROUTERS.MCAST.net: ip-proto-88
> 40 [tos 0xc0]
> 03:00:08.210462 tc-1-1.compulink.gr > IGRP-ROUTERS.MCAST.net: ip-proto-88
> 40 [tos 0xc0]
> 03:00:12.840464 tc-1-1.compulink.gr > IGRP-ROUTERS.MCAST.net: ip-proto-88
> 40 [tos 0xc0]
> 03:00:17.130463 tc-1-1.compulink.gr > IGRP-ROUTERS.MCAST.net: ip-proto-88
> 40 [tos 0xc0]
> 03:00:21.610473 tc-1-1.compulink.gr > IGRP-ROUTERS.MCAST.net: ip-proto-88
> 40 [tos 0xc0]
> 03:00:26.300460 tc-1-1.compulink.gr > IGRP-ROUTERS.MCAST.net: ip-proto-88
> 40 [tos 0xc0]
> 03:00:31.260474 tc-1-1.compulink.gr > IGRP-ROUTERS.MCAST.net: ip-proto-88
> 40 [tos 0xc0]
> 03:00:36.080464 tc-1-1.compulink.gr > IGRP-ROUTERS.MCAST.net: ip-proto-88
> 40 [tos 0xc0]
> 03:00:40.520465 tc-1-1.compulink.gr > IGRP-ROUTERS.MCAST.net: ip-proto-88
> 40 [tos 0xc0]
> 03:00:45.200465 tc-1-1.compulink.gr > IGRP-ROUTERS.MCAST.net: ip-proto-88
> 40 [tos 0xc0]
>
> Ti einai ayta ta paketa kai pws mporw na ta kopsw?
>
> TIA
>
> -A

Kalimera to eiha antimetopisei kai ego afto to provlima.
Oi perissoteroi ISP's ehoun energopoiimeno to multicast kai stelnoun kapia 
paketa IGMP sto modem me apotelesma na empodizei to DOD na kanei tin douleia 
tou. me ena pppstats vlepeis kathe pote stelnei o provider sou paketakia 
tetoia. kai an eisai tiheros ( Forthnet ta stelnei kathe 3 lepta peripou o 
Otenet kathe 30 sec ) rithmizeis analoga to timing tou DOD na rihnei tin 
sindesi. An oxi ( se mia idealnet ta IGMP erhontousan kathe 2 sec) mallon tha 
prepei na deis pos na kaneis afti tin douleia meso ipchains. 


Filika 
Nikos Ladis