netbirdio/netbird · error

link set mtu: %w

Error message

link set mtu: %w

What it means

Error "link set mtu: %w" thrown in netbirdio/netbird.

Source

Thrown at client/iface/device/wg_link_linux.go:82

		}
	}

	log.Debugf("adding device: %s", name)
	err = netlink.LinkAdd(l)
	if os.IsExist(err) {
		log.Infof("interface %s already exists. Will reuse.", name)
	} else if err != nil {
		return fmt.Errorf("link add: %w", err)
	}

	return nil
}

func (l *wgLink) setMTU(mtu int) error {
	if err := netlink.LinkSetMTU(l, mtu); err != nil {
		log.Errorf("error setting MTU on interface: %s", l.attrs.Name)

		return fmt.Errorf("link set mtu: %w", err)
	}

	return nil
}

func (l *wgLink) up() error {
	if err := netlink.LinkSetUp(l); err != nil {
		log.Errorf("error bringing up interface: %s", l.attrs.Name)
		return fmt.Errorf("link setup: %w", err)
	}

	return nil
}

func (l *wgLink) assignAddr(address *wgaddr.Address) error {
	//delete existing addresses
	list, err := netlink.AddrList(l, 0)
	if err != nil {

View on GitHub (pinned to 93e97f4bf1)

When it happens

Trigger: Thrown at client/iface/device/wg_link_linux.go:82 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of netbirdio/netbird@93e97f4bf1 (2026-08-16). Data as JSON: /api/errors/c4845fac75f1f757. Report an issue: GitHub.