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Date:	Wed, 21 May 2014 14:59:22 +0100
From:	Linus Gasser <list@...kas-al-nour.org>
To:	netdev@...r.kernel.org
Subject: Bonding with tun-devices

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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