Arch Linux

mehkir

Member

Registered: 2021-12-12

Posts: 6

[SOLVED] How to get which process creates particular interface

Hi,

I have an unknown interface:

br-91c5a77a5813: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default
    link/ether 02:42:71:d8:05:ba brd ff:ff:ff:ff:ff:ff
    inet 172.20.0.1/16 brd 172.20.255.255 scope global br-91c5a77a5813
       valid_lft forever preferred_lft forever

I have deleted it, but it is recreated at every boot.
Is there a way to find out the purpose of that interface?

Best regards
mehkir

Last edited by mehkir (2021-12-19 15:16:28)

Szybet

Member

Registered: 2021-11-29

Posts: 9

Re: [SOLVED] How to get which process creates particular interface

check whot application is using this ip, for example with netstat. If none, then i have no idea

seth

Member

From: Don't DM me only for attention

Registered: 2012-09-03

Posts: 73,099

Re: [SOLVED] How to get which process creates particular interface

That's a https://wiki.archlinux.org/title/Network_bridge and typcally required by VMs or VPNs

---

How to upload text · How to boot w/o GUI · Disable Windows Fast-Start! · Fix your xinitrc

mehkir

Member

Registered: 2021-12-12

Posts: 6

Re: [SOLVED] How to get which process creates particular interface

I looked for it with netstat -tupn | grep <ip> but no result.
There is also:
docker0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default
    link/ether 02:42:46:53:1a:08 brd ff:ff:ff:ff:ff:ff
    inet 172.17.0.1/16 brd 172.17.255.255 scope global docker0
       valid_lft forever preferred_lft forever

I couldn't really find a relation between docker0 and br-91c5a77a5813 because of their difference in the subnet.
br-91c5a77a5813: 172.20.0.1/16
docker0:                172.17.0.1/16

But i looked with "docker inspect <NETWORK>" (NETWORK is rather used as a name of a docker) for ip settings of used dockers in the past.
Actually i found one and so i deleted it with "docker network rm <NETWORK>".

Thank you both for your time and advice.

Last edited by mehkir (2021-12-20 10:25:23)