bonding: drop traffic on backup interface for active-backup mode
For active-backup mode, we transmit on one and only one interface. However,
we might still receive traffic on the backup interface. We should drop them
and strictly process incoming traffic on only the active interface.
Type: fix
@@ -28,6 +28,7 @@ bond_main_t bond_main;
#define foreach_bond_input_error \
_(NONE, "no error") \
_(IF_DOWN, "interface down") \
+ _(PASSIVE_IF, "traffic received on passive interface") \
_(PASS_THRU, "pass through (CDP, LLDP, slow protocols)")
typedef enum
@@ -158,10 +159,20 @@ bond_update_next (vlib_main_t * vm, vlib_node_runtime_t * node,
ASSERT (bif);
ASSERT (vec_len (bif->slaves));
- if (PREDICT_TRUE (bif->admin_up == 0))
+ if (PREDICT_FALSE (bif->admin_up == 0))
{
*bond_sw_if_index = slave_sw_if_index;
*error = node->errors[BOND_INPUT_ERROR_IF_DOWN];
+ return;
+ }
+
+ if (PREDICT_FALSE ((bif->mode == BOND_MODE_ACTIVE_BACKUP) &&
+ vec_len (bif->active_slaves) &&
+ (slave_sw_if_index != bif->active_slaves[0])))
+ {
+ *bond_sw_if_index = slave_sw_if_index;
+ *error = node->errors[BOND_INPUT_ERROR_PASSIVE_IF];
+ return;
}
*bond_sw_if_index = bif->sw_if_index;
