How to get rid of a network interface?

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I have this unwanted network interface that is not allowing my machine to reach the mail server that has a 172.19. IP address.



I do not know where this comes from.



How do I get permanently rid of it?



br-3e7279f0a872: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
 inet 172.19.0.1 netmask 255.255.0.0 broadcast 172.19.255.255
 inet6 fe80::42:f8ff:fee2:4926 prefixlen 64 scopeid 0x20<link>
 ether 02:42:f8:e2:49:26 txqueuelen 0 (Ethernet)
 RX packets 0 bytes 0 (0.0 B)
 RX errors 0 dropped 0 overruns 0 frame 0
 TX packets 134 bytes 16240 (16.2 KB)
 TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0



networking 18.04




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    up vote
    1
    down vote

    favorite












    I have this unwanted network interface that is not allowing my machine to reach the mail server that has a 172.19. IP address.



    I do not know where this comes from.



    How do I get permanently rid of it?



    br-3e7279f0a872: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
     inet 172.19.0.1 netmask 255.255.0.0 broadcast 172.19.255.255
     inet6 fe80::42:f8ff:fee2:4926 prefixlen 64 scopeid 0x20<link>
     ether 02:42:f8:e2:49:26 txqueuelen 0 (Ethernet)
     RX packets 0 bytes 0 (0.0 B)
     RX errors 0 dropped 0 overruns 0 frame 0
     TX packets 134 bytes 16240 (16.2 KB)
     TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0



    networking 18.04




    share|improve this question






















      up vote
      1
      down vote

      favorite









      up vote
      1
      down vote

      favorite











      I have this unwanted network interface that is not allowing my machine to reach the mail server that has a 172.19. IP address.



      I do not know where this comes from.



      How do I get permanently rid of it?



      br-3e7279f0a872: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
       inet 172.19.0.1 netmask 255.255.0.0 broadcast 172.19.255.255
       inet6 fe80::42:f8ff:fee2:4926 prefixlen 64 scopeid 0x20<link>
       ether 02:42:f8:e2:49:26 txqueuelen 0 (Ethernet)
       RX packets 0 bytes 0 (0.0 B)
       RX errors 0 dropped 0 overruns 0 frame 0
       TX packets 134 bytes 16240 (16.2 KB)
       TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0



      networking 18.04




      share|improve this question












      I have this unwanted network interface that is not allowing my machine to reach the mail server that has a 172.19. IP address.



      I do not know where this comes from.



      How do I get permanently rid of it?



      br-3e7279f0a872: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
       inet 172.19.0.1 netmask 255.255.0.0 broadcast 172.19.255.255
       inet6 fe80::42:f8ff:fee2:4926 prefixlen 64 scopeid 0x20<link>
       ether 02:42:f8:e2:49:26 txqueuelen 0 (Ethernet)
       RX packets 0 bytes 0 (0.0 B)
       RX errors 0 dropped 0 overruns 0 frame 0
       TX packets 134 bytes 16240 (16.2 KB)
       TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0




      networking 18.04





      share|improve this question











      share|improve this question




      share|improve this question










      asked May 8 at 13:04









      Thiago Sayão

      1414




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          1 Answer
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          This seems to work:



          ip link set br-3e7279f0a872 down
          brctl delbr br-3e7279f0a872





          share|improve this answer




















          • this looks like a bridge interface. What about your interface setup ? no bridge somewhere ?
            – solsTiCe
            May 8 at 13:20






          • 1




            found out it's a docker bridge
            – Thiago Sayão
            May 8 at 13:39










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          active

          oldest

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          1 Answer
          1






          active

          oldest

          votes









          active

          oldest

          votes






          active

          oldest

          votes








          up vote
          1
          down vote













          This seems to work:



          ip link set br-3e7279f0a872 down
          brctl delbr br-3e7279f0a872





          share|improve this answer




















          • this looks like a bridge interface. What about your interface setup ? no bridge somewhere ?
            – solsTiCe
            May 8 at 13:20






          • 1




            found out it's a docker bridge
            – Thiago Sayão
            May 8 at 13:39














          up vote
          1
          down vote













          This seems to work:



          ip link set br-3e7279f0a872 down
          brctl delbr br-3e7279f0a872





          share|improve this answer




















          • this looks like a bridge interface. What about your interface setup ? no bridge somewhere ?
            – solsTiCe
            May 8 at 13:20






          • 1




            found out it's a docker bridge
            – Thiago Sayão
            May 8 at 13:39












          up vote
          1
          down vote










          up vote
          1
          down vote









          This seems to work:



          ip link set br-3e7279f0a872 down
          brctl delbr br-3e7279f0a872





          share|improve this answer












          This seems to work:



          ip link set br-3e7279f0a872 down
          brctl delbr br-3e7279f0a872






          share|improve this answer












          share|improve this answer



          share|improve this answer










          answered May 8 at 13:15









          Thiago Sayão

          1414




          1414











          • this looks like a bridge interface. What about your interface setup ? no bridge somewhere ?
            – solsTiCe
            May 8 at 13:20






          • 1




            found out it's a docker bridge
            – Thiago Sayão
            May 8 at 13:39
















          • this looks like a bridge interface. What about your interface setup ? no bridge somewhere ?
            – solsTiCe
            May 8 at 13:20






          • 1




            found out it's a docker bridge
            – Thiago Sayão
            May 8 at 13:39















          this looks like a bridge interface. What about your interface setup ? no bridge somewhere ?
          – solsTiCe
          May 8 at 13:20




          this looks like a bridge interface. What about your interface setup ? no bridge somewhere ?
          – solsTiCe
          May 8 at 13:20




          1




          1




          found out it's a docker bridge
          – Thiago Sayão
          May 8 at 13:39




          found out it's a docker bridge
          – Thiago Sayão
          May 8 at 13:39












           

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