Access E3131 on a headless debian based linux system

I tried several things, not sure which of these are really necessary and which not...

So this answer is a solution if there is already a network connection and the E3131 is not used for acessing the network or inteet.

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Static IP for E3131 (eth1 in my case):

sudo nano /etc/network/interfaces

My content is the following:

# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface
auto eth0
allow-hotplug eth0
iface eth0 inet dhcp
metric 0

# E3131
allow-hotplug eth1
iface eth1 inet static
address 192.168.8.100
netmask 255.255.255.0
gateway 192.168.8.1
metric 1

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Maybe it helps to use metrics, but really not sure. To use this (see content above) the following needs to be installed:

sudo aptitude install ifmetric

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For assigning the right interfaces to eth0 and eth1 I did the following:

sudo nano /etc/udev/rules.d/70-persistent-net.rules

Content:

SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="XX:XX:XX:XX:XX:XX", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="YY:YY:YY:YY:YY:YY", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="eth*", NAME="eth1"

And:

sudo nano /etc/udev/rules.d/010_netinterfaces.rules

Content:

KERNEL=="eth*", SYSFS{address}=="XX:XX:XX:XX:XX:XX", NAME="eth0"
KERNEL=="eth*", SYSFS{address}=="YY:YY:YY:YY:YY:YY", NAME="eth1"

"XX:XX:XX:XX:XX:XX" is the hardware address of the original network interface.
"YY:YY:YY:YY:YY:YY" is the hardware address of the E3131.

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At the beginning, E3131 was not recognized as a network interface but as cdrom. This can be changed by:

sudo /usr/bin/sg_raw /dev/sr0 11 06 20 00 00 00 00 00 01 00

For this the following is needed:

sudo apt-get install sg3-utils

At the end I not needed this command anymore...

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I also installed the network-manager. Not really sure if this is necessary:

sudo apt-get --no-install-recommends install network-manager

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