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Igor-Potapov
Asked: 2021-02-20 01:04:22 +0800 CST

Can't delete network interface

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The last time I receive an error in my browser: Your connection was interrupted A network change was detected. ERR_NETWORK_CHANGED Due to suggestions I disabled IP v6 in my wireless connection but it doesn't take effect.

I decided to see all my network interfaces using the command ip addr. It shows more than 20 different interfaces, all of them similar with last digit difference, and I need to delete them:

10: veth3946f08@if9: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default 
link/ether c2:fc:20:6f:cc:3c brd ff:ff:ff:ff:ff:ff link-netnsid 1
inet6 fe80::c0fc:20ff:fe6f:cc3c/64 scope link 
   valid_lft forever preferred_lft forever

So I made the next command to delete it sudo ip link delete veth3946f08@if9 but unfortunately I got the error: Cannot find device "veth3946f08@if9" hmmm. I make next command to see real or virtual devices: sudo lshw -C network and saw those 20 connections like this:

*-network:2
   description: Ethernet interface
   physical id: 5
   logical name: veth3946f08
   serial: c2:fc:20:6f:cc:3c
   size: 10Gbit/s
   capabilities: ethernet physical
   configuration: autonegotiation=off broadcast=yes driver=veth driverversion=1.0 duplex=full link=yes multicast=yes port=twisted pair speed=10Gbit/s

I tried it to down: sudo ip link set veth3946f08@if9 down and got the same error that Cannot find device "veth3946f08@if9"...

So, how can I delete all of the no-used or no-named interfaces or network adapters?

Added: All IP v6 route

it@Notebook-PC:~$ ip -6 route
::1 dev lo proto kernel metric 256 pref medium
fe80::/64 dev vethcffa914 proto kernel metric 256 pref medium
fe80::/64 dev veth3946f08 proto kernel metric 256 pref medium
fe80::/64 dev vetha3b1511 proto kernel metric 256 pref medium
fe80::/64 dev veth169fcac proto kernel metric 256 pref medium
fe80::/64 dev veth837bcaa proto kernel metric 256 pref medium
fe80::/64 dev veth7509ee9 proto kernel metric 256 pref medium
fe80::/64 dev veth42ac8c3 proto kernel metric 256 pref medium
fe80::/64 dev veth20e1334 proto kernel metric 256 pref medium
fe80::/64 dev veth4d2b8eb proto kernel metric 256 pref medium
fe80::/64 dev wlo1 proto kernel metric 256 pref medium
networking

0 Answers