ppp interface and an ethernet interface both not working together
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I have a Rasberry Pi with two network interfaces.
One is a ppp interface connecting to a cellular modem over USB.
The other is a local ethernet connection with an ethernet cable connected to a local device.
The ppp interface works well when I start a systemd service to connect to it on boot-up.
However, as soon as I plug in the ethernet cable and boot the device, the eth0 interface and ppp both show up on ifconfig, but with the ppp interface I can not connect out to anything, for example ping 8.8.8.8 states that the destination is unreachable. If I plug out the ethernet cable tho again, it works fine.
Any idea what is going wrong here and why the two connections are not working at the same time? Thanks
`
linux networking ethernet ifconfig ppp
asked Feb 1 at 1:12
Engineer999Engineer999
1065
add a comment |
I have a Rasberry Pi with two network interfaces.
One is a ppp interface connecting to a cellular modem over USB.
The other is a local ethernet connection with an ethernet cable connected to a local device.
The ppp interface works well when I start a systemd service to connect to it on boot-up.
However, as soon as I plug in the ethernet cable and boot the device, the eth0 interface and ppp both show up on ifconfig, but with the ppp interface I can not connect out to anything, for example ping 8.8.8.8 states that the destination is unreachable. If I plug out the ethernet cable tho again, it works fine.
Any idea what is going wrong here and why the two connections are not working at the same time? Thanks
`
linux networking ethernet ifconfig ppp
asked Feb 1 at 1:12
Engineer999Engineer999
1065
add a comment |
I have a Rasberry Pi with two network interfaces.
One is a ppp interface connecting to a cellular modem over USB.
The other is a local ethernet connection with an ethernet cable connected to a local device.
The ppp interface works well when I start a systemd service to connect to it on boot-up.
However, as soon as I plug in the ethernet cable and boot the device, the eth0 interface and ppp both show up on ifconfig, but with the ppp interface I can not connect out to anything, for example ping 8.8.8.8 states that the destination is unreachable. If I plug out the ethernet cable tho again, it works fine.
Any idea what is going wrong here and why the two connections are not working at the same time? Thanks
`
linux networking ethernet ifconfig ppp
asked Feb 1 at 1:12
Engineer999Engineer999
1065
I have a Rasberry Pi with two network interfaces.
One is a ppp interface connecting to a cellular modem over USB.
The other is a local ethernet connection with an ethernet cable connected to a local device.
The ppp interface works well when I start a systemd service to connect to it on boot-up.
However, as soon as I plug in the ethernet cable and boot the device, the eth0 interface and ppp both show up on ifconfig, but with the ppp interface I can not connect out to anything, for example ping 8.8.8.8 states that the destination is unreachable. If I plug out the ethernet cable tho again, it works fine.
Any idea what is going wrong here and why the two connections are not working at the same time? Thanks
`
linux networking ethernet ifconfig ppp
linux networking ethernet ifconfig ppp
asked Feb 1 at 1:12
Engineer999Engineer999
1065
asked Feb 1 at 1:12
Engineer999Engineer999
1065
asked Feb 1 at 1:12
Engineer999Engineer999
1065
asked Feb 1 at 1:12
Engineer999Engineer999
1065
asked Feb 1 at 1:12
Engineer999Engineer999
1065
1065
add a comment |
add a comment |
1 Answer
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When the ethernet cable is connected the device is getting a new default route which is being preferred, but is possibly invalid. You should be able to see/manipulate this with the route or ip route command.
answered Feb 1 at 9:25
davidgodavidgo
44.7k75292
Yes that's the problem. I can fix it with route add default gateway "address" . However this needs to be solved on startup automatically. No matter what I do. If I run the script from rc.local, .bashrc, insde rc5.d ,whatever, it never works for me unless i enter the command myself normally on the terminal after i log in
– Engineer999
Feb 3 at 6:16
add a comment |
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1 Answer
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1 Answer
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When the ethernet cable is connected the device is getting a new default route which is being preferred, but is possibly invalid. You should be able to see/manipulate this with the route or ip route command.
answered Feb 1 at 9:25
davidgodavidgo
44.7k75292
Yes that's the problem. I can fix it with route add default gateway "address" . However this needs to be solved on startup automatically. No matter what I do. If I run the script from rc.local, .bashrc, insde rc5.d ,whatever, it never works for me unless i enter the command myself normally on the terminal after i log in
– Engineer999
Feb 3 at 6:16
add a comment |
When the ethernet cable is connected the device is getting a new default route which is being preferred, but is possibly invalid. You should be able to see/manipulate this with the route or ip route command.
answered Feb 1 at 9:25
davidgodavidgo
44.7k75292
Yes that's the problem. I can fix it with route add default gateway "address" . However this needs to be solved on startup automatically. No matter what I do. If I run the script from rc.local, .bashrc, insde rc5.d ,whatever, it never works for me unless i enter the command myself normally on the terminal after i log in
– Engineer999
Feb 3 at 6:16
add a comment |
When the ethernet cable is connected the device is getting a new default route which is being preferred, but is possibly invalid. You should be able to see/manipulate this with the route or ip route command.
answered Feb 1 at 9:25
davidgodavidgo
44.7k75292
When the ethernet cable is connected the device is getting a new default route which is being preferred, but is possibly invalid. You should be able to see/manipulate this with the route or ip route command.
answered Feb 1 at 9:25
davidgodavidgo
44.7k75292
edited Feb 3 at 6:27
answered Feb 1 at 9:25
davidgodavidgo
44.7k75292
answered Feb 1 at 9:25
davidgodavidgo
44.7k75292
answered Feb 1 at 9:25
davidgodavidgo
44.7k75292
44.7k75292
Yes that's the problem. I can fix it with route add default gateway "address" . However this needs to be solved on startup automatically. No matter what I do. If I run the script from rc.local, .bashrc, insde rc5.d ,whatever, it never works for me unless i enter the command myself normally on the terminal after i log in
– Engineer999
Feb 3 at 6:16
add a comment |
Yes that's the problem. I can fix it with route add default gateway "address" . However this needs to be solved on startup automatically. No matter what I do. If I run the script from rc.local, .bashrc, insde rc5.d ,whatever, it never works for me unless i enter the command myself normally on the terminal after i log in
– Engineer999
Feb 3 at 6:16
Yes that's the problem. I can fix it with route add default gateway "address" . However this needs to be solved on startup automatically. No matter what I do. If I run the script from rc.local, .bashrc, insde rc5.d ,whatever, it never works for me unless i enter the command myself normally on the terminal after i log in
– Engineer999
Feb 3 at 6:16
Yes that's the problem. I can fix it with route add default gateway "address" . However this needs to be solved on startup automatically. No matter what I do. If I run the script from rc.local, .bashrc, insde rc5.d ,whatever, it never works for me unless i enter the command myself normally on the terminal after i log in
– Engineer999
Feb 3 at 6:16
add a comment |
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