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Problem with route on eth0 cable disconnected


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root@orangepipcplus:~# route -n
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
0.0.0.0         0.0.0.0         0.0.0.0         U     1002   0        0 eth0
0.0.0.0         192.168.30.1    0.0.0.0         UG    1024   0        0 wlan0
169.254.0.0     0.0.0.0         255.255.0.0     U     0      0        0 eth0
169.254.0.0     0.0.0.0         255.255.0.0     U     1000   0        0 wlan0
192.168.30.0    0.0.0.0         255.255.255.0   U     0      0        0 wlan0

 

Edited by chwe
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Hello thanks for the attention

I'm only using wifi! However dhcclient is networkManager, it creates the ip class 169.254.0.0 on port eth0 and it creates Destination = 0.0.0.0 and gateway: 0.0.0.0 for eth0 that with the disconnected network cable, with the ifconf eth0 down command takes all Routes the eth0 interface, plus in 3 to 5 minutes the turn activates the interface and creates everything again.

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Hi,

 

i have the same issue, after boot there is only device:wlan0, but after some time I have eth0 and eth0:avahi

 

$ sudo ifconfig
bond0     Link encap:Ethernet  HWaddr 96:06:73:94:b5:98  
          UP BROADCAST MASTER MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

eth0      Link encap:Ethernet  HWaddr 02:c8:06:83:22:ef  
          UP BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)
          Interrupt:50 

eth0:avahi Link encap:Ethernet  HWaddr 02:c8:06:83:22:ef  
          inet addr:169.254.8.145  Bcast:169.254.255.255  Mask:255.255.0.0
          UP BROADCAST MULTICAST  MTU:1500  Metric:1
          Interrupt:50 

lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:168 errors:0 dropped:0 overruns:0 frame:0
          TX packets:168 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:14624 (14.2 KiB)  TX bytes:14624 (14.2 KiB)

wlan0     Link encap:Ethernet  HWaddr 98:3b:16:e8:e7:b3  
          inet addr:192.168.0.12  Bcast:192.168.0.255  Mask:255.255.255.0
          inet6 addr: fe80::9a3b:16ff:fee8:e7b3/64 Scope:Link
          inet6 addr: fd00:8494:8cb6:68e2:9a3b:16ff:fee8:e7b3/64 Scope:Global
          inet6 addr: 2a02:8109:a53f:ff3c::3/128 Scope:Global
          inet6 addr: 2a02:8109:a53f:ff3c:9a3b:16ff:fee8:e7b3/64 Scope:Global
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:949 errors:0 dropped:0 overruns:0 frame:0
          TX packets:553 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:118594 (115.8 KiB)  TX bytes:154410 (150.7 KiB)

which results in 2 default routes for IPv4 (IPv6 is fine)

$ sudo route
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
default         *               0.0.0.0         U     1002   0        0 eth0
default         hitronhub.home  0.0.0.0         UG    1024   0        0 wlan0
link-local      *               255.255.0.0     U     0      0        0 eth0
link-local      *               255.255.0.0     U     1000   0        0 wlan0
192.168.0.0     *               255.255.255.0   U     0      0        0 wlan0

The easy workaround is to delete default route on interface eth0, which is not connected.

$ sudo ip route del default dev eth0

 

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