[gentoo-user] dummy0 network interface

[gentoo-user] dummy0 network interface

[Raffaele BELARDI]

After a recent world update I have a new network interface in addition
to 'lo' and the real network interface ('eth0', now named 'enp1s4'):

# ifconfig dummy0
dummy0: flags=195<UP,BROADCAST,RUNNING,NOARP>  mtu 1500
        ether 2e:a2:4b:cb:f2:3f  txqueuelen 0  (Ethernet)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 51  bytes 19992 (19.5 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

# udevadm info -p /sys/class/net/dummy0
P: /devices/virtual/net/dummy0
E: DEVPATH=/devices/virtual/net/dummy0
E: IFINDEX=2
E: INTERFACE=dummy0
E: SUBSYSTEM=net

I'm using sys-fs/udev-210 on an ~amd64 with the predictable network
interface names.

Does anybody know where this dummy0 interface comes from?
Can I (or should I) disable or remove it?

thanks,

raffaele

Re: [gentoo-user] dummy0 network interface

[Neil Bothwick]

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On Wed, 5 Mar 2014 10:28:09 +0100, Raffaele BELARDI wrote:

> After a recent world update I have a new network interface in addition
> to 'lo' and the real network interface ('eth0', now named 'enp1s4'):

"a recent world update" means nothing to us, it coud have included
anything.

> # ifconfig dummy0
> dummy0: flags=195<UP,BROADCAST,RUNNING,NOARP>  mtu 1500
>         ether 2e:a2:4b:cb:f2:3f  txqueuelen 0  (Ethernet)
>         RX packets 0  bytes 0 (0.0 B)
>         RX errors 0  dropped 0  overruns 0  frame 0
>         TX packets 51  bytes 19992 (19.5 KiB)
>         TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

> Does anybody know where this dummy0 interface comes from?
> Can I (or should I) disable or remove it?

It's nothing to do with udev, it is a kernel feature, enabled by
CONFIG_DUMMY. You can disable it if you wish, or build it as a module in
which case the interface will not appear until you modprobe it.


-- 
Neil Bothwick

C&W music backward: get yer dog, wife, job, truck, kids, and sobriety
back.

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Re: [gentoo-user] dummy0 network interface

[Alan McKinnon]

On 05/03/2014 11:28, Raffaele BELARDI wrote:
> After a recent world update I have a new network interface in addition
> to 'lo' and the real network interface ('eth0', now named 'enp1s4'):
> 
> # ifconfig dummy0
> dummy0: flags=195<UP,BROADCAST,RUNNING,NOARP>  mtu 1500
>         ether 2e:a2:4b:cb:f2:3f  txqueuelen 0  (Ethernet)
>         RX packets 0  bytes 0 (0.0 B)
>         RX errors 0  dropped 0  overruns 0  frame 0
>         TX packets 51  bytes 19992 (19.5 KiB)
>         TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
> 
> # udevadm info -p /sys/class/net/dummy0
> P: /devices/virtual/net/dummy0
> E: DEVPATH=/devices/virtual/net/dummy0
> E: IFINDEX=2
> E: INTERFACE=dummy0
> E: SUBSYSTEM=net
> 
> I'm using sys-fs/udev-210 on an ~amd64 with the predictable network
> interface names.
> 
> Does anybody know where this dummy0 interface comes from?
> Can I (or should I) disable or remove it?
> 
> thanks,
> 
> raffaele
> 
> 


CONFIG_DUMMY set in the kernel?


-- 
Alan McKinnon
alan.mckinnon@gmail.com

Re: [gentoo-user] dummy0 network interface

[Raffaele BELARDI]

Alan McKinnon wrote:
> On 05/03/2014 11:28, Raffaele BELARDI wrote:
>> After a recent world update I have a new network interface in addition
>> to 'lo' and the real network interface ('eth0', now named 'enp1s4'):
>>
>> # ifconfig dummy0
>> dummy0: flags=195<UP,BROADCAST,RUNNING,NOARP>  mtu 1500
>>         ether 2e:a2:4b:cb:f2:3f  txqueuelen 0  (Ethernet)
>>         RX packets 0  bytes 0 (0.0 B)
>>         RX errors 0  dropped 0  overruns 0  frame 0
>>         TX packets 51  bytes 19992 (19.5 KiB)
>>         TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
> 
> CONFIG_DUMMY set in the kernel?
> 

Yes, that's it, thanks.