Date: Thu, 30 Jul 1998 11:18:16 +0930 From: "Andrew Hodges" <ahodges@itsolutions.com.au> To: <freebsd-stable@FreeBSD.ORG> Subject: Fw: twin network cards in one PC Message-ID: <001e01bdbb5c$1fc484c0$1901a8c0@scooter.itsolutions.com.au>
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I have had similar issues in the past with this and have no problems with two ethernet cards now and can route between interfaces etc. However, I have complicated the matter further by doing dialin using PPP. Therefore I have an additional network to consider. Currently I have a remote 10.0.0.0/24 LAN connected via PPP 192.168.1.100 --> 192.168.1.101. The machine that has 192.168.1.101 has two ethernets 192.168.1.1 and 203.x.x.x. The bit that puzzles me is that I have proxyarp on the PPP link. Does this mean that the PPP interface appears as though it is on the local LAN in the same subnet? If so then routing should all work, right?. Have I configured this correctly, or am I missing something? regards Andrew -----Original Message----- From: Tom <tom@uniserve.com> To: Jeff Kletsky <Jeff@Wagsky.com> Cc: Phil Allsopp <phil@virtek.com>; freebsd-stable@FreeBSD.ORG <freebsd-stable@FreeBSD.ORG> Date: Thursday, 30 July 1998 9:55 Subject: Re: twin network cards in one PC > >> >When I put two network cards in one Pc and both cards are on the same >> >subnet ie. 194.159.112.3 and >> >194.159.112.4 >> > >> >I can not ping one of the cards wheras if I have one of the cards set to >> >192.168.1.1 >> > >> >I can ping them both. >> > >> >Why is this ? >> >> Try looking at your firewall configuration (pointed to in /etc/rc.conf) to >> make sure that the addresses both permit the proper flow of packets. Stock >> FreeBSD configurations only expect one IP address. > > No, it much simpler. You can't have two interfaces within the same >network. Why? Think about routing. If you have 10.0.0.1/24 on one >interface, and 10.0.0.2/24 on another interface, to which interface does >traffic destined for 10.0.0.0/10 go out from? Once you configure the >first interface, you will get an implied route for network 10.0.0.0/0 out >via the first interface. When configuring the second interface, the >implied route is either overwritten or ignored (I don't remember, which >but I think it is ignored with an error). Basically, the route table can >only have one route for a particular network. > > Someone is working on load balancing code. This code will allow >multiple routes to a particular network, and will balance traffic among >them. > >Tom > > >To Unsubscribe: send mail to majordomo@FreeBSD.org >with "unsubscribe freebsd-stable" in the body of the message To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
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