Receive DUP packet when ping

Hi all,
I have set up a bonding in Linux Enterprise 4. It seems works fine
but I receive DUP packets when I ping it from other Linux.
Is it because I connect with hubs so I got DUP packets? Any bad things
I will get from DUP packets?
Actually, I have set the bonding in mode 2. I have put the following
lines in mobprobe.conf then reboot the machine.
alias bond0 bonding
options bond0 miimon=100 mode=2
I think mode 2 is Active-backup mode, so only one NIC is active.
However, why I will get DUP packets? I am so confused.
Any one can help me and tell me how to fix it if it can be done.

Thank you in advanced.

Regards,
Chi

Hello,

(E-Mail Removed) a écrit :
> Hi all,
> I have set up a bonding in Linux Enterprise 4. It seems works fine
> but I receive DUP packets when I ping it from other Linux.
> Is it because I connect with hubs so I got DUP packets? Any bad things
> I will get from DUP packets?
> Actually, I have set the bonding in mode 2.

I don't think mode 2 is intended for use with a hub.

> I think mode 2 is Active-backup mode, so only one NIC is active.

No, mode 2 is balance-xor which requires a switch which supports
trunking. Active-backup is mode 1.

Thanks for reply, yes it's my mistake I should set mode1 instead of
mode2.
However, I still got Dup packet when i ping from outside. Is it because
i use hubs?
Thanks again
Pascal Hambourg 寫�：

> Hello,
>
> (E-Mail Removed) a écrit :
> > Hi all,
> > I have set up a bonding in Linux Enterprise 4. It seems works fine
> > but I receive DUP packets when I ping it from other Linux.
> > Is it because I connect with hubs so I got DUP packets? Any bad things
> > I will get from DUP packets?
> > Actually, I have set the bonding in mode 2.
>
> I don't think mode 2 is intended for use with a hub.
>
> > I think mode 2 is Active-backup mode, so only one NIC is active.
>
> No, mode 2 is balance-xor which requires a switch which supports
> trunking. Active-backup is mode 1.