On 3/25/25 00:40, Laine Stump via Devel wrote:
When using the default SLIRP backend for <interface type='user'>, the <ip address='blah' prefix='blur'/> setting doesn't behave as might be expected (i.e. it doesn't set the guest interface IP/prefix to exactly the provided values). This *should* have created questions when users originally encountered it, but instead it has become more apparent as people are contemplating switching from using the SLIRP backend to using passt instead (with passt, the <ip> settings do behave "as expected").
In order to make this difference in behavior less mysterious, Yalan Zhang kindly took the time to test and document the effect of various representative <ip> settings on guest interface config when SLIRP is used (see https://issues.redhat.com/browse/RHEL-46601); this patch adds that same table to libvirt's documentation.
Signed-off-by: Laine Stump <laine@redhat.com> --- docs/formatdomain.rst | 69 ++++++++++++++++++++++++++++++++++++------- 1 file changed, 58 insertions(+), 11 deletions(-)
Reviewed-by: Michal Privoznik <mprivozn@redhat.com> Michal