Two Ethernet Connections

[microsvcBob]

Debian installed on a device with 2 ethernet connections. Debian is only showing one, not both.
The LEDs for the hardware are on, showing a connection for Ethernet 2.
How do I get Ethernet 2 to work?

~Bob

[lindi]

What do you see with

Code: Select all

lspci

and

Code: Select all

ip address

commands?

[arzgi]

What are you trying to achieve? Linux normally uses the first network it finds, if not otherwise directed. To get load balancing or other more sophisticated functions, you need additional software.

[CwF]

simple check

Code: Select all

$ ls /sys/class/net

should list all enumerated interfaces

Code: Select all

$ cat /sys/class/net/*/address 

will list successful 'up' interface ip's.

[microsvcBob]

What do you see with

Code: Select all

lspci

and

Code: Select all

ip address

commands?

lspci
Shows all my PCI devices. The Ethernet connections are not listed.

ip address

Code: Select all

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
2: enp5s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
    link/ether 00:14:5e:2a:75:32 brd ff:ff:ff:ff:ff:ff
    inet 192.168.0.8/24 brd 192.168.0.255 scope global noprefixroute enp5s0
       valid_lft forever preferred_lft forever
    inet6 fe80::3ab:2f27:89e4:451c/64 scope link noprefixroute
       valid_lft forever preferred_lft forever
3: enp6s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
    link/ether 00:14:5e:2a:75:33 brd ff:ff:ff:ff:ff:ff

[microsvcBob]

simple check

Code: Select all

$ ls /sys/class/net

should list all enumerated interfaces

Code: Select all

$ cat /sys/class/net/*/address 

will list successful 'up' interface ip's.

ls /sys/class/net

Code: Select all

enp5s0  enp6s0  lo

cat /sys/class/net/*/address

Code: Select all

00:14:5e:2a:75:32
00:14:5e:2a:75:33
00:00:00:00:00:00

[fabien]

Please use code tags for terminal outputs. I did it for your in the above posts.

[CwF]

Code: Select all

$ cat /sys/class/net/*/address 

will list successful 'up' interface ip's.

So what was I thinking? that's the MAC's...

anyway, maybe they are usb, so lsusb.

In any case, they're both there.