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Date:      Fri, 15 Sep 2006 17:31:14 +0530
From:      Arindam <arindam.mukerjee@gmail.com>
To:        bob.middaugh@comcast.net
Cc:        Garrett Cooper <youshi10@u.washington.edu>, freebsd-questions@freebsd.org
Subject:   Re: Network connectivity between FreeBSD and Linux
Message-ID:  <d85a51ff0609150501n5b87a1bcpcdb5d3b65513b25b@mail.gmail.com>
In-Reply-To: <1158320583.25573.9.camel@freebsd>
References:  <d85a51ff0609140349p54bb3c6ud9b578791b7fbf1@mail.gmail.com> <3748E46A-16BD-4AD9-8EC3-84B10538F2BB@u.washington.edu> <d85a51ff0609140415t575ed7a6w75ba70335381e028@mail.gmail.com> <49B0565D-2C10-43CF-AB15-9CD712EFC074@u.washington.edu> <d85a51ff0609142217o4101f1dahb3b4f41302153347@mail.gmail.com> <1158320583.25573.9.camel@freebsd>

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> > > >>
> > > >> > I have FreeBSD 6.1 installed on one machine and Fedora Core 2 on
> > > >> > another. I dual boot the FreeBSD 6.1 machine with a RedHat EL 4.3
> > > >> > installation. I have assigned the same static IP address and
> > > >> hostname
> > > >> > to this machine for both the FreeBSD and RHEL installations.
> > > >> >
> > > >> > While my RHEL installation is running, I am able to communicate
> > > >> with
> > > >> > the FC2 installation over the network. When FreeBSD is running, all
> > > >> > pings from either side fail. I have no clue if I need to look at
> > > >> some
> > > >> > special configuration, or is it a problem with the basics.
> > > >> >
> > > >> > Wond'ring what to do.
> > > >> >
> > > >> > Cheers,
> > > >> > Andy
> > > >> > --
> > > >>
> > > >> /sbin/ifconfig output? Also, do you happen to have a firewall in your
> > > >> FreeBSD OS setup :)?
> >
> > 1. No firewall running.
> > 2. Here is the output:
> >
> > pcn0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
> >       inet6 fe80::260:b0ff:fe87:42ca%pcn0 prefixlen 64 scopeid 0x1
> >       inet 10.0.0.101 netmask 0xffffff00 broadcast 10.0.0.255
> >       ether 00:60:b0:87:42:ca
> >       media: Ethernet autoselect (100baseTX <full-duplex>)
> >       status: active
> > plip0: flags=108810<POINTOPOINT,SIMPLEX,MULTICAST,NEEDSGIANT> mtu 1500
> > lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 16384
> >       inet6 ::1 prefixlen 128
> >       inet6 fe80::1%lo0 prefixlen 64 scopeid 0x3
> >       inet 127.0.0.1 netmask 0xff000000
> >
> >
> > What I have noticed is that when I ping from the other machine (FC2)
> > then at least the two lights corresponding to these two machines
> > blink.
> >
> > When I ping from my FreeBSD to the FC2 box, then the switch lights do
> > not blink. This leads me to suspect that the packets from the BSD host
> > are never making it to the network cable - is my network card
> > supported I wonder.
> >
> > What I have seen is that this same network card works when I boot to
> > RHEL4.3 which is the other OS on this box and it does ping alright
> > between the two boxes.
> >
> > On FreeBSD, this NIC is detected as AMD 79c79x - I could do ifconfig
> > to set the IP and netmask - no errors were reported. However it does
> > not look like I am at all getting on the network with this.
> >
> > Cheers,
> > Andy
>
> >From the FreeBSD box, can you ping the loopback address: 127.0.0.1, if
> so, can you ping your ip address:  10.0.0.101.  If so, can you ping your
> gateway?  Did you set a gateway in /etc/rc.conf?

loopback: Yes I can ping it.

10.0.0.101: Yes again I can ping it. But I set this as the gateway. I
just got two home PCs connected to each other over a 5-port switch
with. 10.0.0.100 and 10.0.0.101 (this one). I set this as the gateway
because a while later when I hook this to the web, this will be the
box. And I might add a couple of more boxes to this network at best.

I did not set a gateway in /etc/rc.conf. I configured the whole thing
using sysinstall and a couple of times after that using ifconfig (ip
addr and netmask).

>
> defaultrouter="your gateway ip address"              # Set to default
> gateway (or NO).

But I guess whatever the method, such an entry would have been written
to rc.conf.

>
> Since you set it statically, is your netmask correct?  From the FreeBSD
> box, when you boot to linux, is the duplex setting for you network card
> the same as when you boot FreeBSD?  This is strange, needless to say.

My netmask is 255.255.255.0. That's a choice ... I am not sure I can
offhand say if that's the correct choice or not. With the eventual
size of my network that I can anticipate, I could even set it to
255.255.255.192 may be.

How do you find out the duplex setting :P (terribly ashamed of my
newbiness). I guess it is full duplex under both.

>
> Bob
>
>

Cheers,
Andy



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