Re: [PATCH net-next 6/6] selftests: net: Add tests for neigh_forward_grat option

[Nikolay Aleksandrov <razor@blackwall.org>]

On 03/05/2026 10:35, Danielle Ratson wrote:
> Add tests to validate the neigh_forward_grat bridge option for selective
> forwarding of gratuitous neighbor announcements.
> 
> The tests verify per-port and per-VLAN control of gratuitous neighbor
> announcement forwarding for both IPv4 (gratuitous ARP) and IPv6
> (unsolicited NA):
> - When neigh_suppress is enabled with neigh_forward_grat off (default),
>    gratuitous announcements are suppressed
> - When neigh_forward_grat is enabled, gratuitous announcements are
>    forwarded while regular neighbor discovery remains suppressed
> 
> For IPv4, use arping to send gratuitous ARP packets. For IPv6, use
> mausezahn to craft unsolicited Neighbor Advertisement packets.
> 
> For the per-port tests, the IPv4 test exercises the ip link interface,
> while the IPv6 test exercises the bridge link interface.
> The per-VLAN tests use the bridge interface throughout, as per-VLAN
> attributes are only accessible via 'bridge vlan'.
> 
> Signed-off-by: Danielle Ratson <danieller@nvidia.com>
> ---
>   .../net/test_bridge_neigh_suppress.sh         | 298 +++++++++++++++++-
>   1 file changed, 296 insertions(+), 2 deletions(-)
> 

Acked-by: Nikolay Aleksandrov <razor@blackwall.org>