[Bug 1436330] Re: Network Manager doesn't set metric for local networks any more, causing connection issues

[pureblood]

After installing Ubuntu 15.04 my routing table looked like:

$ route -n
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
0.0.0.0         10.10.100.3     0.0.0.0         UG    1024   0        0 eth0
10.10.96.0      0.0.0.0         255.255.248.0   U     0      0        0 eth0
10.10.96.0      0.0.0.0         255.255.248.0   U     0      0        0 wlan0
169.254.0.0     0.0.0.0         255.255.0.0     U     1000   0        0 wlan0

After installing network-manager_0.9.10.0-4ubuntu16_amd64.deb and libnm-
util2_0.9.10.0-4ubuntu16_amd64.deb my routing table looked like:

$ route -n
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
0.0.0.0         10.10.100.3     0.0.0.0         UG    100    0        0 eth0
0.0.0.0         10.10.100.3     0.0.0.0         UG    400    0        0 wlan0
10.10.96.0      0.0.0.0         255.255.248.0   U     0      0        0 wlan0
10.10.96.0      0.0.0.0         255.255.248.0   U     0      0        0 eth0
169.254.0.0     0.0.0.0         255.255.0.0     U     1000   0        0 wlan0

However, my DNS servers are:

$ cat /etc/resolv.conf
# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
#     DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
nameserver 10.10.100.11
nameserver 10.10.100.12

So, if I understand correctly, even with version 0.9.10.0-4ubuntu16 of
the network manager, there is still a metric issue which could cause the
system to attempt to connect to my DNS servers through the wireless
connection even when perfectly connected through the ethernet cable.

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https://bugs.launchpad.net/bugs/1436330

Title:
  Network Manager doesn't set metric for local networks any more,
  causing connection issues

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