On 2/7/19 11:34 PM, Ido Schimmel wrote: > > Yes. This patch configures the route itself to drop packets, but we can > instead configure it as a remote route and configure the adjacency entry > to drop packets. > > If you later want to change X routes using this blackhole nexthop to a > different one, then create the new one and tell the hardware to do the > switch in a single operation. It will basically grep over all configured > routes and do: > > s/blackhole_adjacency_index/new_adjacency_index/ > s/black_ecmp_size/new_ecmp_size/ > > See RALEU in drivers/net/ethernet/mellanox/mlxsw/reg.h
Thanks for the reference. > > I assume that user can't put blackhole and normal nexthops in the same > group? > I allow a nexthop group to reference a nexthop that is a blackhole, but the group can only contain the one entry. That allows multipath routes to toggle between a blackhole and a real spec.
