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[Bug 1471526] [NEW] NetworkManager creates duplicate networks

 

Public bug reported:

I have two networks:
1 x Wireless network
1 x USB dongle ( MobileBroadband)

The issue is that NetworkManager assigns the same network for both of
them so I can't do any kind of routing and basically one network is
unusable. Even worse sometimes  the network is not working at all
because I guess the packets get confused on which NIC they should go.
I can provide more debug information upon request.

 ip route show
default via 192.168.1.1 dev eth1  proto static 
192.168.1.0/24 dev wlan0  proto kernel  scope link  src 192.168.1.100 
192.168.1.0/24 dev eth1  proto kernel  scope link  src 192.168.1.100  metric 1 


 ip addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default 
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: eth0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast state DOWN group default qlen 1000
    link/ether ec:a8:6b-MASKED brd ff:ff:ff:ff:ff:ff
4: wlan0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
    link/ether f8:16:54:-MASKED brd ff:ff:ff:ff:ff:ff
    inet 192.168.1.100/24 brd 192.168.1.255 scope global wlan0
       valid_lft forever preferred_lft forever
    inet6 fe80::fa16:54ff:fe96:c648/64 scope link 
       valid_lft forever preferred_lft forever
46: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UNKNOWN group default qlen 1000
    link/ether 58:2c:80:-MASKED brd ff:ff:ff:ff:ff:ff
    inet 192.168.1.100/24 brd 192.168.1.255 scope global eth1
       valid_lft forever preferred_lft forever
    inet6 fe80::5a2c:80ff:fe13:9263/64 scope link 
       valid_lft forever preferred_lft forever


Ubuntu 14.04.1 LTS

** Affects: network-manager (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: trusty

** Package changed: network-manager-applet (Ubuntu) => network-manager
(Ubuntu)

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https://bugs.launchpad.net/bugs/1471526

Title:
  NetworkManager creates duplicate networks

Status in network-manager package in Ubuntu:
  New

Bug description:
  I have two networks:
  1 x Wireless network
  1 x USB dongle ( MobileBroadband)

  The issue is that NetworkManager assigns the same network for both of
  them so I can't do any kind of routing and basically one network is
  unusable. Even worse sometimes  the network is not working at all
  because I guess the packets get confused on which NIC they should go.
  I can provide more debug information upon request.

   ip route show
  default via 192.168.1.1 dev eth1  proto static 
  192.168.1.0/24 dev wlan0  proto kernel  scope link  src 192.168.1.100 
  192.168.1.0/24 dev eth1  proto kernel  scope link  src 192.168.1.100  metric 1 


   ip addr
  1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default 
      link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
      inet 127.0.0.1/8 scope host lo
         valid_lft forever preferred_lft forever
      inet6 ::1/128 scope host 
         valid_lft forever preferred_lft forever
  2: eth0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast state DOWN group default qlen 1000
      link/ether ec:a8:6b-MASKED brd ff:ff:ff:ff:ff:ff
  4: wlan0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
      link/ether f8:16:54:-MASKED brd ff:ff:ff:ff:ff:ff
      inet 192.168.1.100/24 brd 192.168.1.255 scope global wlan0
         valid_lft forever preferred_lft forever
      inet6 fe80::fa16:54ff:fe96:c648/64 scope link 
         valid_lft forever preferred_lft forever
  46: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UNKNOWN group default qlen 1000
      link/ether 58:2c:80:-MASKED brd ff:ff:ff:ff:ff:ff
      inet 192.168.1.100/24 brd 192.168.1.255 scope global eth1
         valid_lft forever preferred_lft forever
      inet6 fe80::5a2c:80ff:fe13:9263/64 scope link 
         valid_lft forever preferred_lft forever

  
  Ubuntu 14.04.1 LTS

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