Re: Lost all network connectivity after clean FC3 install

[Salvatore Indiogine]

Hi Jay:

If I have now only eth0 active the internet connection
works.  However, if I activate eth1 (LAN NIC) it does
not anymore.

The settings for eth1 are:

IP: 10.0.0.1
Mask: 255.0.0.0
Gateway: 10.0.0.50

The only other PC on the LAN has IP 10.0.0.50

With FC1 it all worked perfectly. Neither did I have
to worry about entering a gateway for eth0. I wonder
what is wrong.

Thanks for your help.

Enrico
 --- Jay Scherrer  ha scritto:
> Enrico,
>
> Nope thats the fix. 
> And if you got the net working :-)
>
> Happy Holidays,
> Jay
>
> On Tuesday 07 December 2004 05:34 pm, you wrote:
> > An update:
> >
> > For some reason DHCP in FC3, unlike FC1, is not
>
> able
> > to assign a correct gateway to eth0.
> >
> > I booted up in Knoppix which also has no problem
>
> to
> > configure eth0 with DHCP.  Poking around in /etc
>
> of
> > Knoppix I found out which gateway was given to
>
> eth0.
> > Rebooted in FC3 and added
>
> "GATEWAY=xxx.xxx.xxx.xxx"
> > (of course the correct numbers) to
> > /etc/sysconfig/network-scripts/ifcfg-eth0
> >
> > This is most likely a hack and not a fix.  But at
> > least now I can connect to the internet.
> >
> > Any suggestions for a real fix?
> >
> > Thanks!
> >
> > Enrico
> >
> > -- Enrico Indiogine  ha
>
> scritto:
> > > Hi Jay!
> > > My cable modem is not a router.  It is
>
> connnected
> > > to eth0.  It is a model that is supposed to work
> > > with
> > > only 1 PC as far as I can tell.
> > > I have no idea on how to log into my cable
>
> modem.
> > > With FC1 I had absolutely no problems.  I just
>
> had
> > > configured eth0 to use DHCP.
> > > I will try to set the eth0 gateway to
>
> 68.187.12.0
> > > and see what happens.
> > >
> > > Thanks for your help.
> > >
> > > Enrico
> > >
> > > --- Jay Scherrer  ha scritto:
> > > > Make your Gateway to your (68.187.12.0) if its
>
> a
> > > > fixed addess
> > > > otherwise Assign a lan address to your to your
> > >
> > > cable
> > > > modem and have
> > > > that as your gatway.
> > > > Mine is like so if I'm running a DHCP ISP:
> > > > /etc/hosts
> > > > 192.1681.1  myCableModem (the gateway)
> > > > 192.168.1.110 mylinuxBox1
> > > > 192.168.1.150 myOtherLinuxbox
> > > >
> > > > The Cable modem is probably running as a
>
> router
> > > also
> > > > isn't it?
> > > > Have logged into the cable modem?
> > > > If you do make sure you change your password
>
> from
> > > > the default  :-)
> > > >
> > > > Jay Scherrer
> > > >
> > > > On Tuesday 07 December 2004 06:58 am, you
>
> wrote:
> > > > > Hi Jay!
> > > > >
> > > > > Your observation makes sense.  If I do a
> > >
> > > "netstat
> > > > -rn"
> > > > > with both eth0 (-> cable modem) and eth1 (->
>
> LAN
> > > )
> > > > > activated, I see that the default gateway is
> > > >
> > > > 10.0.0.1.
> > > > > When I run "ifdown eth1" which will
>
> inactivate
> > > the
> > > > LAN
> > > > > NIC and run "netstat -rn" again I get this:
> > > > >
> > > > > destination: 68.187.12.0
> > > > > gateway:     0.0.0.0
> > > > > genmask:     255.255.252.0
> > > > > flags:       U
> > > > > MSS:         0
> > > > > Window:      0
> > > > > irtt:        0
> > > > > Iface:       eth0
> > > > >
> > > > > I can ping the inet address assigned to eth0
>
> by
> > > > DHCP
> > > > > and can also ping 0.0.0.0.  However, when I
>
> ping
> > > > the
> > > > > ip address of one of the DNS servers (from
> > > > > /etc/resolv.conf) I get:
> > > > >
> > > > > Connect: Network is unreachable
> > > > >
> > > > > Same with any other IP on the outside.
> > > > >
> > > > > When I check the timestamp of
>
> /etc/resolv.conf
> > > it
> > > > is
> > > > > equal to the PCs startup time.  So, the
>
> cable
> > > > modem is
> > > > > able to (re)recreate /etc/resolv.conf each
>
> time.
> > > > > What should the default gateway to my cable
> > >
> > > modem
> > > > be
> > > > > (0.0.0.0 seems not to be correct) and where
>
> do I
> > > > > configure it?
> > > > >
> > > > > Thanks!
> > > > > Enrico
> > > > >
> > > > > --- Jay Scherrer  ha
>
> scritto:
> > > > > > How about your GATEWAY were is it
>
> pointing?
> > > > > > Sometimes I get a slow net or no net at
>
> all by
> > > > > > mixing up my Gateway's
> > > > > > between eth0 and eth1. Which ever eth is
> > > >
> > > > pointing to
> > > > > > your DSL is the GATEWAY.
> > > > >
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>
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=== message truncated ===

___________________________________ 
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