fib: P2P interfaces do not need specific multicast adjacencies
they can use the 'auto' adj for all traffic
Type: fix
@@ -2571,9 +2571,24 @@ fib_path_contribute_forwarding (fib_node_index_t path_index,
/*
* Create the adj needed for sending IP multicast traffic
*/
+ if (vnet_sw_interface_is_p2p(vnet_get_main(),
+ path->attached.fp_interface))
+ {
+ /*
+ * point-2-point interfaces do not require a glean, since
+ * there is nothing to ARP. Install a rewrite/nbr adj instead
+ */
+ ai = adj_nbr_add_or_lock(dpo_proto_to_fib(path->fp_nh_proto),
+ fib_forw_chain_type_to_link_type(fct),
+ &zero_addr,
+ path->attached.fp_interface);
+ }
+ else
+ {
ai = adj_mcast_add_or_lock(dpo_proto_to_fib(path->fp_nh_proto),
fib_forw_chain_type_to_link_type(fct),
path->attached.fp_interface);
+ }
dpo_set(dpo, DPO_ADJACENCY,
fib_forw_chain_type_to_dpo_proto(fct),
ai);
