On Wed, Jul 19, 2017 at 10:36:52AM -0600, David Ahern wrote: > >> 2. How are routes with devices unrelated to ports owned by this driver > >> handled? > > > > They are handled just like any other route, but they don't have a valid > > RIF (for directly connected routes) or an adjacency group (for > > gatewayed routes), so the check in mlxsw_sp_fib_entry_should_offload() > > will return false and they will be programmed to the device with trap > > action, but using a trap ID (RTR_INGRESS0) with a lower traffic class > > than IP2ME, so packets that actually need to be locally received by the > > CPU have a better QoS. > > so mlxsw keeps a copy of the complete FIB for IPv4 and IPv6, even routes > unrelated to its ports?
If we don't reflect all the routes in the system to the ASIC, then we'll have a broken routing table and a different behavior from what you would get with plain NICs.
