The hash thresholds assigned to IPv6 nexthops are in the range of [-1, 2^31 - 1], where a negative value is assigned to nexthops that should not be considered during multipath selection.
Therefore, in a similar fashion to IPv4, we need to use the upper 31-bits of the multipath hash for multipath selection. Signed-off-by: Ido Schimmel <ido...@mellanox.com> --- net/ipv6/route.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/net/ipv6/route.c b/net/ipv6/route.c index ced2c9bed10b..09e8e10b101d 100644 --- a/net/ipv6/route.c +++ b/net/ipv6/route.c @@ -1833,10 +1833,10 @@ u32 rt6_multipath_hash(const struct flowi6 *fl6, const struct sk_buff *skb) if (skb) { ip6_multipath_l3_keys(skb, &hash_keys); - return flow_hash_from_keys(&hash_keys); + return flow_hash_from_keys(&hash_keys) >> 1; } - return get_hash_from_flowi6(fl6); + return get_hash_from_flowi6(fl6) >> 1; } void ip6_route_input(struct sk_buff *skb) -- 2.14.3