Admin should be able to set any state. Currently, this fails when lladdr is not changed and state is changed from NUD_CONNECTED to NUD_STALE:
ip neigh add 192.168.8.1 lladdr 00:11:22:33:44:55 nud perm dev wlan0 ip neigh show to 192.168.8.1 192.168.8.1 dev wlan0 lladdr 00:11:22:33:44:55 PERMANENT ip neigh change 192.168.8.1 lladdr 00:11:22:33:44:55 nud stale dev wlan0 ip neigh show to 192.168.8.1 192.168.8.1 dev wlan0 lladdr 00:11:22:33:44:55 PERMANENT Problem may be from 2.1.X days. Signed-off-by: Julian Anastasov <j...@ssi.bg> --- net/core/neighbour.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/net/core/neighbour.c b/net/core/neighbour.c index cf26e04c4..2ae929f 100644 --- a/net/core/neighbour.c +++ b/net/core/neighbour.c @@ -1148,7 +1148,8 @@ int neigh_update(struct neighbour *neigh, const u8 *lladdr, u8 new, } else goto out; } else { - if (lladdr == neigh->ha && new == NUD_STALE) + if (lladdr == neigh->ha && new == NUD_STALE && + !(flags & NEIGH_UPDATE_F_ADMIN)) new = old; } } -- 1.9.3