If I disable eth1 with
ifdown eth1
the results of the same commands are:
----------------------------------------------
root@pc1:/# ip link show
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state
UNKNOWN qlen 1000
link/ether 00:18:f3:91:08:9d brd ff:ff:ff:ff:ff:ff
3: eth1: <BROADCAST,MULTICAST> mtu 1500 qdisc pfifo_fast state DOWN qlen 1000
link/ether 00:18:f3:91:11:eb brd ff:ff:ff:ff:ff:ff
4: wlan0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast state
DOWN qlen 1000
link/ether 00:15:af:08:f6:ea brd ff:ff:ff:ff:ff:ff
----------------------------------------------
root@pc1:/# ip addr show
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state
UNKNOWN qlen 1000
link/ether 00:18:f3:91:08:9d brd ff:ff:ff:ff:ff:ff
inet 192.168.1.2/24 brd 192.168.1.255 scope global eth0
inet6 fe80::218:f3ff:fe91:89d/64 scope link
valid_lft forever preferred_lft forever
3: eth1: <BROADCAST,MULTICAST> mtu 1500 qdisc pfifo_fast state DOWN qlen 1000
link/ether 00:18:f3:91:11:eb brd ff:ff:ff:ff:ff:ff
inet 192.168.1.3/24 brd 192.168.1.255 scope global eth1
4: wlan0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast state
DOWN qlen 1000
link/ether 00:15:af:08:f6:ea brd ff:ff:ff:ff:ff:ff
----------------------------------------------
root@pc1:/# ip route show
192.168.1.0/24 dev eth0 proto kernel scope link src 192.168.1.2
default via 192.168.1.1 dev eth0 metric 100
----------------------------------------------
root@pc1:/# ip route get 1.2.3.4
1.2.3.4 via 192.168.1.1 dev eth0 src 192.168.1.2
cache mtu 1500 advmss 1460 hoplimit 64
----------------------------------------------
root@pc1:/# route
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
192.168.1.0 * 255.255.255.0 U 0 0 0 eth0
default 192.168.1.1 0.0.0.0 UG 100 0 0 eth0
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https://bugs.launchpad.net/bugs/788301
Title:
Networking fails with two interfaces on the same network
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