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

[Iain Lane]

I tried silo-027 and it seems better (I think).

The packet loss problem remains though: thre's a ~20s break in traffic when the
new interface comes up or goes down though - for example:

laney at nightingale> ping -I wlan0 orangesquash.org.uk                                                                                                                                                ~
PING orangesquash.org.uk (85.119.82.37) from 192.168.1.135 wlan0: 56(84) bytes of data.
64 bytes from cripps.orangesquash.org.uk (85.119.82.37): icmp_seq=1 ttl=56 time=12.0 ms
[ … ]
64 bytes from cripps.orangesquash.org.uk (85.119.82.37): icmp_seq=20 ttl=56 time=10.6 ms
64 bytes from cripps.orangesquash.org.uk (85.119.82.37): icmp_seq=21 ttl=56 time=14.8 ms
64 bytes from cripps.orangesquash.org.uk (85.119.82.37): icmp_seq=22 ttl=56 time=13.9 ms
64 bytes from cripps.orangesquash.org.uk (85.119.82.37): icmp_seq=23 ttl=56 time=14.8 ms
64 bytes from cripps.orangesquash.org.uk (85.119.82.37): icmp_seq=24 ttl=56 time=13.3 ms
64 bytes from cripps.orangesquash.org.uk (85.119.82.37): icmp_seq=25 ttl=56 time=15.4 ms
64 bytes from cripps.orangesquash.org.uk (85.119.82.37): icmp_seq=26 ttl=56 time=14.3 ms
64 bytes from cripps.orangesquash.org.uk (85.119.82.37): icmp_seq=27 ttl=56 time=12.6 ms
*** there's a gap here ****
64 bytes from cripps.orangesquash.org.uk (85.119.82.37): icmp_seq=47 ttl=56 time=25.5 ms
64 bytes from cripps.orangesquash.org.uk (85.119.82.37): icmp_seq=48 ttl=56 time=17.3 ms
64 bytes from cripps.orangesquash.org.uk (85.119.82.37): icmp_seq=49 ttl=56 time=23.9 ms

with both interfaces up

laney at nightingale> ip ro
default via 192.168.1.1 dev enx0023563c3054  proto static  metric 100 
default via 192.168.1.1 dev wlan0  proto static  metric 400 
169.254.0.0/16 dev wlan0  scope link  metric 1000 
192.168.1.0/24 dev enx0023563c3054  proto kernel  scope link  metric 100 
192.168.1.0/24 dev wlan0  proto kernel  scope link  metric 400

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

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