Date: Sat, 29 Apr 2000 12:53:12 +0200 From: Alexander Strauss <strauss@astracom.net> To: Rob Pickering <rob@syntonet.co.uk> Cc: freebsd-isdn@freebsd.org Subject: Re: [Fwd: NetBSD RAW-IP Problem] Message-ID: <390ABF18.8EDB022B@astracom.net> References: <19637.200004291037@mailgate.syntonet.co.uk>
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I assume that FTP transfers are crashing over the ISDN line is also expectable? Regarding the PING: The same ping between 2 Isdn4Linux systems works, probably because the MTU set on an IF causes splitting of the packets - this is the purpose of the MTU, right? By the way, I'm working with Isdn4Linux for ~4 years now, and I've got it running on both dialup and leased lines with Cisco, Ascend, SunISDN, PC and certainly other Linux systems with almost no problems. Why this shouldn't work with NetBSD? Oh, I know, you expected that. Rob Pickering wrote: > > So lets get this straight, you are sending 10Kbytes/sec over a channel > with a max capacity <8Kbytes/sec and you are surprised that there is > packet loss. > > This is *exactly* what one would expect. > > Alexander Strauss Said: > > Hi, > > > > in the meantime I've tried the same with a SyncPPP connection - same > > problem, ~ 70% packet loss when sending large packets...no chance to get > > a FTP transfer through. Playing with MTU sizes won't change anything on > > that behaviour... > > > > root@alex-i4b:/usr/src/i4b/driver:(15)# ping -s 10000 matahari > > PING matahari.mktg.tide.ti.com (137.167.205.70): 10000 data bytes > > 10008 bytes from 137.167.205.70: icmp_seq=0 ttl=255 time=2605.575 ms > > 10008 bytes from 137.167.205.70: icmp_seq=1 ttl=255 time=3092.091 ms > > 10008 bytes from 137.167.205.70: icmp_seq=2 ttl=255 time=3781.507 ms > > 10008 bytes from 137.167.205.70: icmp_seq=3 ttl=255 time=4272.504 ms > > 10008 bytes from 137.167.205.70: icmp_seq=4 ttl=255 time=4961.288 ms > > 10008 bytes from 137.167.205.70: icmp_seq=5 ttl=255 time=5453.076 ms > > 10008 bytes from 137.167.205.70: icmp_seq=6 ttl=255 time=6142.071 ms > > 10008 bytes from 137.167.205.70: icmp_seq=7 ttl=255 time=6633.131 ms > > 10008 bytes from 137.167.205.70: icmp_seq=9 ttl=255 time=7623.009 ms > > 10008 bytes from 137.167.205.70: icmp_seq=11 ttl=255 time=8420.784 ms > > 10008 bytes from 137.167.205.70: icmp_seq=13 ttl=255 time=9410.000 ms > > 10008 bytes from 137.167.205.70: icmp_seq=15 ttl=255 time=10399.712 ms > > ^C^C > > ----matahari.mktg.tide.ti.com PING Statistics---- > > 41 packets transmitted, 12 packets received, 70.7% packet loss > > round-trip min/avg/max/stddev = 2605.575/6066.229/10399.712/2506.544 ms > > > > This ping has been performed with a i4b <--> i4l raw IP connection, > > using SyncPPP is even bader than that. > > > > So my question: Is *anyone* out there who's got a *working* BSD <--> > > Linux ISDN connection? Please let me know... > > > > Thank you, > > Alex > > > > Alexander Strauss wrote: > > > > > > >On Fri, Apr 28, 2000 at 11:17:50AM +0200, Alexander Strauss wrote: > > > >> If I ping the remote system, it seems to work. Also an rlogin works the > > > >> first time, but at any point the rlogin sessions hangs and won't come > > > >> back. Same with FTP: > > > > > > > >try a ping wit a long packet size. I strongly suspect some MTU problem > > > >leading to lost packets... you might want to manually limit the route MTU > > > >or interface MTU to make it work. > > > > > > > >Regards, > > > > -is > > > > > > You're right - when pinging with a large packet size (>=7000) I see the > > > same behaviour as with the other applications. But also if I limit the > > > interface MTU on both systems to 500 (the lowest possible value), my > > > transfers are not going through... > > > > > > Any other ideas? > > > > > > Thanks, > > > Alex > > > > > > -- > > > best regards, > > > Alexander Strauss <strauss@astracom.net> > > > > -- > > best regards, > > Alexander Strauss <strauss@astracom.net> > > > > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > > with "unsubscribe freebsd-isdn" in the body of the message > > > > -- best regards, Alexander Strauss <strauss@astracom.net> To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-isdn" in the body of the message
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