FIB path preference
Paths are given a preference, lowest value is 'best'. Only paths that are up are up contribute to fprwarding - that's unchanged. What's new is that of the path's that re up only those that have the best preference contribute. A poor man's primary and backup. It's not true primary/backup function because the FIB must converge before the lower preference paths are used.
Change-Id: Ie4453c4a7b1094c6c2b51fe1594b8302103bb68e
Signed-off-by: Neale Ranns <nranns@cisco.com>
diff --git a/src/vnet/fib/fib_path.h b/src/vnet/fib/fib_path.h
index 0b5e607..a34cb43 100644
--- a/src/vnet/fib/fib_path.h
+++ b/src/vnet/fib/fib_path.h
@@ -167,7 +167,8 @@
extern int fib_path_recursive_loop_detect(fib_node_index_t path_index,
fib_node_index_t **entry_indicies);
extern u32 fib_path_get_resolving_interface(fib_node_index_t fib_entry_index);
-extern int fib_path_get_weight(fib_node_index_t path_index);
+extern u16 fib_path_get_weight(fib_node_index_t path_index);
+extern u16 fib_path_get_preference(fib_node_index_t path_index);
extern void fib_path_module_init(void);
extern fib_path_list_walk_rc_t fib_path_encode(fib_node_index_t path_list_index,