clib_memcpy (&t->tunnel_src, &a->src, sizeof (t->tunnel_src));
clib_memcpy (&t->tunnel_dst, &a->dst, sizeof (t->tunnel_dst));
clib_memcpy (&t->tunnel_src, &a->src, sizeof (t->tunnel_src));
clib_memcpy (&t->tunnel_dst, &a->dst, sizeof (t->tunnel_dst));