netdev - Re: Bonding with tun-devices

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Date:	Wed, 21 May 2014 17:55:23 +0200
From:	Nikolay Aleksandrov <nikolay@...hat.com>
To:	Linus Gasser <list@...kas-al-nour.org>, netdev@...r.kernel.org
Subject: Re: Bonding with tun-devices

On 05/21/2014 03:59 PM, Linus Gasser wrote:
> Dear list,
> 
> I'm trying to create a bonded interface using tun-devices created by the
> 
> ssh -NTCf -w 0:0
> 
> command. The reason is that I'm behind a satellite connection with per-stream
> limited bandwidth...
> 
> On some older kernels everything was fine, and I could do:
> 
> # ssh -NTCf -w 0:0 web
> # ssh -NTCf -w 1:1 web
> # modprobe bonding mode=0 miimon=100
> # ifconfig bond0 172.16.0.1 netmask 255.255.255.0
> # ifconfig bond0 hw ether 12:34:56:78:9a
> # ifenslave bond0 tun0 tun1
> 
> on one side and
> 
> # modprobe bonding mode=0 miimon=100
> # ifconfig bond0 172.16.0.2 netmask 255.255.255.0
> # ifconfig bond0 hw ether 12:35
> # ifenslave -f bond0 tun0 tun1
> # ping 172.16.0.1
> 
> on the other side. On a newer kernel (>3.14) this doesn't work (at least not on
> linux-armv7), while on 3.13 it does work under linux-armv7. Now I've been told
> to use the iproute2-suite, as ifenslave is deprecated. But if I try to do
> 
> # ssh -NTCf -w 0:0 web
> # ssh -NTCf -w 1:1 web
> # ip link add name bond1 type bond
> # ip link set dev tun0 master bond1
> 
> it gives me an error
> 
> RTNETLINK answers: Operation not supported
> 
> Any idea what I'm doing wrong?
> 
> Linus
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Hi,
Could you please try modprobe bonding mode=0 miimon=100 fail_over_mac=active ?
I know that fail_over_mac doesn't affect that mode, but I think I can see why
it's happening.

Cheers,
 Nik
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