Date: Wed, 03 Feb 1999 09:57:40 -0600 From: Benjamin Gavin <gavinb@supranet.net> To: freebsd-stable@FreeBSD.ORG, Gregory Bond <gnb@itga.com.au> Subject: Re: 3Com 3C509B Oddities Message-ID: <4.1.19990203094304.00b61760@mail.supranet.net> In-Reply-To: <199902022209.JAA12139@lightning.itga.com.au> References: <Your message of Tue, 02 Feb 1999 08:26:36 -0800.>
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Hi, Just to clear everything up... 1) I am not having a problem with conflicting IPs, I am fully aware that sharing IPs doesn't work. 2) I am also using internal, non-routable IPs running through a firewall (IPFW 3.0-STABLE) running NAT. The Internal network is running 10MBit switched using an HP 24-port switch (that may be where the floating MAC Addresses are coming from...) 3) It is an ISA _3C509_ that is giving me trouble, not the 905. I am still having some very interesting problems. I will state them here, then probably throw another ethernet card in the machine to see if they are limited to just that card/OS combination, or to the OS itself. Here are the problems I am having... 1) I am able to flood ping out from the machine to the firewall. 2) I am able to flood ping from the firewall to the machine. 3) I am unable to FTP to anywhere from the machine and maintain a decent datastream, this includes passive and active mode transfers. The connection starts, then stalls itself, never to be retrieved again. Even 'ifconfig ep0 up' doesn't do the trick. 4) I am able to FTP from the machine (file /kernel.GENERIC) 5) I am able to telnet to/from the machine just fine I don't have the time to test every network service, but I think this is some highly non-standard behavior that we are seeing here. The interesting thing is this... The firewall is also using two 3C509s and it is running an earlier version of 3.0-STABLE, possibly about 2-3 weeks old, maybe as much as a month. What has changed since then??? Anyone? Ben Gavin At 09:09 AM 2/3/99 +1100, you wrote: >> I had a 3C509B in a 2.2.8 machine for a while with no problems... I haven't >> had it in a 3.0 machine yet - I'm using a DEC Tulip card in it right now. >> Maybe 3.0 broke something? >> > >Nope. I have been using a 905B since 3.0-R and now 3.0-Stable with no >problems at all: > >>xl0: <3Com 3c905B Fast Etherlink XL 10/100BaseTX> rev 0x00 int a irq 11 on >pci0.17.0 >>xl0: Ethernet address: 00:10:5a:a9:84:33 >>xl0: autoneg complete, link status good (full-duplex, 100Mbps) > >The messages the original poster was getting about ether addresses moving >probably means that several machines are attempting to use the same IP address >and they are fighting over it. This explains why it works periodically - when >this machine has 'control' it receives packets, but as soon as one of the other >machines attempts to use the net, it 'steals' the ARP entries and this machine >stops. It would also explain the failing ftps: when another machine steals the >IP address, the in-progress TCP session will get a RST because the new machine >has no knowledge of the open session, causing the FTP server to drop the >connection even when this machine steals back the IP address. > >Sharing IPs is A Bad Thing. > > > > >To Unsubscribe: send mail to majordomo@FreeBSD.org >with "unsubscribe freebsd-stable" in the body of the message /--------------------------------------------------------------------------/ Benjamin Gavin - Senior Consultant *********** NO SPAM!! ************ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
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