[Sussex] Anyone into bondage?

[Brendan Whelan]

Jon,

I will extract a card from another system - will I need to configure the
change of MAC number anywhere?

Also, I will connect two network cables.

Thanks,  Brendan

----- Original Message -----
From: "Jon Fautley" <jfautley at redhat.com>
To: "LUG email list for the Sussex Counties" <sussex at mailman.lug.org.uk>
Sent: Thursday, September 29, 2005 4:55 PM
Subject: Re: [Sussex] Anyone into bondage?


> Brendan Whelan wrote:
> > Jon,
> >
> > Thanks for the info.
> >
> > On the connectivity, I mean that if the cable is moved from eth0
(Onboard
> > NIC) to eth1 (Offboard NIC) then I cannot connect.
>
> Bonding won't work in this manner. You need to have a cable connected to
> both interfaces for it to function correctly.
>
> > I am using Fedora core 3.
>
> Good Man :)
>
> > Using "ifconfig eth0 up" and "ifconfig eth1 up"made no difference.
> >
> > When the cable is connected to the onboard NIC:
> > ethtool eth0|grep "Link" gave Link detected yes
> > ethtool eth1|grep "Link" gave Link detected no
> >
> > When the cable is connected to the offboard NIC:
> > ethtool eth0|grep "Link" gave Link detected no
> > ethtool eth1|grep "Link" gave Link detected no - the cable is obviously
> > physically connected as one of the leds is on and another is flashing -
> > presumably because the other end of the link is transmitting.
>
> This means that the network card doesn't support link detection. Is this
> the Realtek NIC?
>
> If the system can't detect a Link Down condition then you may run into
> problems with Bonding as the system will always think the NIC is OK and
> connected. You should try and swap the offboard for one with a different
> chipset.
>
> Regards,
>
> Jon
>
> > ----- Original Message -----
> > From: "Jon Fautley" <jfautley at redhat.com>
> > To: "LUG email list for the Sussex Counties" <sussex at mailman.lug.org.uk>
> > Sent: Thursday, September 29, 2005 3:29 PM
> > Subject: Re: [Sussex] Anyone into bondage?
> >
> >
> >
> >>Brendan Whelan wrote:
> >>
> >>>Jon,
> >>>
> >>>Thanks for the response..............
> >>>The problem is that, when I try to use bonding, I can connect to the
> >>>Ethernet socket on the motherboard but not to the one on a separate
> >
> > card.
> >
> >>>(When not bonded, if I configure the two Ethernet ports with different
> >
> > IP
> >
> >>>addresses then they both work.) Below are the various files and system
> >>>information. I have executed:
> >>>service network restart
> >>>ifup eth0
> >>>ifup eth1
> >>>
> >>
> >>[SNIP]
> >>
> >>I'm not quite sure what you mean by this? When using bonding, the
> >>seperate physical interfaces 'go away' and can't be used individually.
> >>All network configuration or usage needs to go through the bondX device
> >>(bond0 in your case).
> >>
> >>Do you mean that when you remove one of the network cables, it's not
> >>working? I.e. you pull the cable from the onboard NIC and it doesn't
> >>continue to use the offboard NIC?
> >>
> >>Try running 'ifconfig eth0 up; ifconfig eth1 up' and see if this makes a
> >>difference. I don't think it will do, but it's worth a try ;)
> >>
> >>What mode are you running the bonding in? Are you using the default? (if
> >>so, what Distro).
> >>
> >>it's worth checking that the system realises when you remove the cable
> >>too, run ethtool eth0 | grep "Link" and see what it reports, both before
> >>and after the cable pull. Try this for eth1 too.
> >>
> >>
> >>>I don't know where the 169.254.0.0 is coming from as it isn't one of my
> >>>addresses?
> >>
> >>That's the standard 'autoconfigure' address block as defined by RFC1918.
> >>All systems that can't obtain a DHCP lease are entitled to grab a random
> >>address in that range (169.254/16). It's most commonly used by Microsoft
> >>Windows to enable NetBIOS over TCP/IP to function in a broken network
> >>environment.
> >>
> >>Regards,
> >>
> >>Jon
> >>--
> >>Jon Fautley <jfautley at redhat.com>     direct: +44 1483 739615
> >>  Presales Technical Consultant        office: +44 1483 300169
> >>  Red Hat UK                           mobile: +44 7841 558683
> >>  10 Alan Turing Road, Surrey Research Park, Guildford GU2 7YF
> >>
> >>
> >>_______________________________________________
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> >>Sussex at mailman.lug.org.uk
> >>Sussex LUG Website: http://www.sussex.lug.org.uk/
> >>http://mailman.lug.org.uk/mailman/listinfo/sussex
> >>
> >>
> >
> >
> >
> >
> > _______________________________________________
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> > Sussex at mailman.lug.org.uk
> > Sussex LUG Website: http://www.sussex.lug.org.uk/
> > http://mailman.lug.org.uk/mailman/listinfo/sussex
>
>
> --
> Jon Fautley <jfautley at redhat.com>     direct: +44 1483 739615
>   Presales Technical Consultant        office: +44 1483 300169
>   Red Hat UK                           mobile: +44 7841 558683
>   10 Alan Turing Road, Surrey Research Park, Guildford GU2 7YF
>
>
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>