Re: Changing rdomain on an interface after the rdomain has already been set openbsd7.0 / 7.1snapshots

loopback interfaces are special and kind of end up representing an rdomain inside the kernel, which is where this restriction comes from.

dlg

> On 2 Apr 2022, at 09:36, Tom Smyth <tom.smyth@wirelessconnect.eu> wrote:
>
> Hello,
> I came across an issue that once a rdomain is set on a
> loopback interface
> you cant change it without destroying and re-creating the interace,
> while it appears you can change a virtio network interface, is this a
> bug or a feature
>
> tobsd# ifconfig lo3 create
> tobsd# ifconfig lo3 rdomain 3
> tobsd# ifconfig lo3 inet 127.0.0.1/8
> tobsd# ifconfig lo3
> lo3: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> rdomain 3 mtu 32768
> index 5 priority 0 llprio 3
> groups: lo
> inet6 ::1 prefixlen 128
> inet6 fe80::1%lo3 prefixlen 64 scopeid 0x5
> inet 127.0.0.1 netmask 0xff000000
> tobsd# ifconfig lo3 rdomain 0
> ifconfig: SIOCSIFRDOMAIN: Operation not permitted
> tobsd# ifconfig
>
>
> --
> Kindest regards,
> Tom Smyth.
>