Hi,
I am running a pi5 and as I have just upgraded my internet and network I have a USB 2.5 Gbe that I would like to use.
Can anyone sign post me in the right direction on how I can use this instead on the onboard NIC.
I have a had good and browse of the forum and cannot find anything.
Thanks
welcome to the dietpi forums! uh are you using this as a pc thats why you need 2.5gbe? if your just using this to watch movies over a network you dont really need 2.5gbe. have you tried a usb adapter? i tried a few usb adapters that used 2.5gbe here is one i use for dietpi on a pc and on a nas. Amazon.com: 2.5G USB to Ethernet Adapter, USB 3.0 to RJ45 Ethernet Adapter, Gigabit LAN Adapter for Xbox 360, Laptop, Computer, Mac, Chromebook, Microsoft Surface : Electronics
**I havent tested this using a raspberry only with a full desktop using dietpi and a network storage with dietpi and the qnap software.
I am using my pi as a download client so I would like it to benefit from the faster internet connection.
It is listed in the USB devices but I cannot see a way to use it instead of the onboard NIC. I am looking where I can config the adapter set IP etc.
Can you share following
ip a
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 noprefixroute
valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether d8:3a:dd:e7:67:78 brd ff:ff:ff:ff:ff:ff
inet 192.168.0.254/24 brd 192.168.0.255 scope global eth0
valid_lft forever preferred_lft forever
inet6 xxxx:xxx:xxxx:x:xxxx:xxxx:xxxx:xxxx/64 scope global dynamic mngtmpaddr
valid_lft 47752sec preferred_lft 47752sec
inet6 fe80::da3a:ddff:fee7:6778/64 scope link
valid_lft forever preferred_lft forever
3: eth1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
link/ether 6c:1f:f7:1b:a2:0f brd ff:ff:ff:ff:ff:ff
I masked my IPv6 address.
that is one of the other adapters i tried out and returned as it didnt work for me. it would constantly disconnect… probably due to defects though. it looks like its showing up but not as 2.5gbs.
It’s eth1. Unfortunately our tools did not support 2 ethernet adapter directly. Therefore you would need to configure the eth1 adapter manuall, using a drop in configuration file at /etc/network/interfaces.d/
I have not done this before, I create a file with something like:
auto eth1
iface eth1 inet static
address 192.168.40.112
netmask 255.255.255.0
gateway 192.168.40.1
Do I need to call the file something in particular? I’m guessing eth1
The name should not matter. You can try to bring the adapter up using
ifup eth1
I created the file and I can ping on the IP address but when I unplug the onboard NIC I dont get a connection and when I unplug the USB NIC I can still ping it.
It seems that the IP address is on the onboard NIC.
ip a shows:
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 noprefixroute
valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether d8:3a:dd:e7:67:78 brd ff:ff:ff:ff:ff:ff
inet 192.168.0.254/24 brd 192.168.0.255 scope global eth0
valid_lft forever preferred_lft forever
inet6 xxxx:xxx:xxxx:x:xxxx:xxxx:xxxx:xxxx/64 scope global dynamic mngtmpaddr
valid_lft 46388sec preferred_lft 46388sec
inet6 fe80::da3a:ddff:fee7:6778/64 scope link
valid_lft forever preferred_lft forever
3: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether 6c:1f:f7:1b:a2:0f brd ff:ff:ff:ff:ff:ff
inet 192.168.0.249/24 brd 192.168.0.255 scope global eth1
valid_lft forever preferred_lft forever
inet6 xxxx:xxx:xxxx:x:xxxx:xxxx:xxxx:xxxx/64scope global dynamic mngtmpaddr
valid_lft 46388sec preferred_lft 46388sec
inet6 fe80::6e1f:f7ff:fe1b:a20f/64 scope link
valid_lft forever preferred_lft forever
and the file my config file as below:
auto eth1
iface eth1 inet static
address 192.168.0.249
netmask 255.255.255.0
gateway 192.168.0.1
You can identify the nic by its mac address. Simply connect the onboard nic only and check which mac address/adapter has an ip adress assigned.
I did an arp -a and the IP the IP addess I set for the USB is using the onboard NIC for some reason:
arp -a 192.168.0.149
Interface: 192.168.0.81 --- 0x4
Internet Address Physical Address Type
192.168.0.249 d8-3a-dd-e7-67-78 dynamic
arp -a 192.168.0.254
Interface: 192.168.0.81 --- 0x4
Internet Address Physical Address Type
192.168.0.254 d8-3a-dd-e7-67-78 dynamic
I’m not quite sure on this. Maybe @trendy has an idea
your gateway has a weird number you sure you set it right?
what’s weird about it?
This one seems to be strange. Or has this be done on a different device?
“0.254” in your gateway part is weird to me i dunno. 
just funny ip “picks” i guess.
Thats the arp-a command from Windows with the IP 192.168.0.81. I used ARP to find the MAC addresses of the NIC of the IP set for eth1
Are you able to paste or screen shot where you are seeing this? 192.168.0.254 is the IP of eth0 I dont see any gateways shown in the “ip a” command output.
Did you had both connected at this moment?
What about enabling wifi and connecting via WiFi. Afterwards go to disabled onboard ethernet. This should allow your usb nic to become eth0