diff --git a/nest/route.h b/nest/route.h
index 28980c7c..8fe64a83 100644
--- a/nest/route.h
+++ b/nest/route.h
@@ -222,13 +222,6 @@ typedef struct rte {
   byte pflags;				/* Protocol-specific flags */
   btime lastmod;			/* Last modified */
   union {				/* Protocol-dependent data (metrics etc.) */
-    struct {				/* Routes generated by krt sync (both temporary and inherited ones) */
-      s8 src;				/* Alleged route source (see krt.h) */
-      u8 proto;				/* Kernel source protocol ID */
-      u8 seen;				/* Seen during last scan */
-      u8 best;				/* Best route in network, propagated to core */
-      u32 metric;			/* Kernel metric */
-    } krt;
   } u;
 } rte;
 
diff --git a/sysdep/bsd/krt-sock.c b/sysdep/bsd/krt-sock.c
index b55df047..bca2d9d2 100644
--- a/sysdep/bsd/krt-sock.c
+++ b/sysdep/bsd/krt-sock.c
@@ -551,13 +551,21 @@ krt_read_route(struct ks_msg *msg, struct krt_proto *p, int scan)
   rte e0 = {}, *e = &e0;
   e->attrs = &a;
   e->net = net;
-  e->u.krt.src = src;
-  e->u.krt.proto = src2;
+
+  ea_list *ea = alloca(sizeof(ea_list) + 1 * sizeof(eattr));
+  *ea = (ea_list) { .count = 1, .next = e->attrs->eattrs };
+  e->attrs->eattrs = ea;
+
+  ea->attrs[0] = (eattr) {
+    .id = EA_KRT_SOURCE,
+    .type = EAF_TYPE_INT,
+    .u.data = src2,
+  };
 
   if (scan)
-    krt_got_route(p, e);
+    krt_got_route(p, e, src);
   else
-    krt_got_route_async(p, e, new);
+    krt_got_route_async(p, e, new, src);
 }
 
 static void
diff --git a/sysdep/linux/netlink.c b/sysdep/linux/netlink.c
index c8eeda7d..ae33a144 100644
--- a/sysdep/linux/netlink.c
+++ b/sysdep/linux/netlink.c
@@ -1456,14 +1456,26 @@ nl_announce_route(struct nl_parse_state *s)
   rte e0 = {}, *e = &e0;
   e->attrs = s->attrs;
   e->net = s->net;
-  e->u.krt.src = s->krt_src;
-  e->u.krt.proto = s->krt_proto;
-  e->u.krt.metric = s->krt_metric;
+
+  ea_list *ea = alloca(sizeof(ea_list) + 2 * sizeof(eattr));
+  *ea = (ea_list) { .count = 2, .next = e->attrs->eattrs };
+  e->attrs->eattrs = ea;
+
+  ea->attrs[0] = (eattr) {
+    .id = EA_KRT_SOURCE,
+    .type = EAF_TYPE_INT,
+    .u.data = s->krt_proto,
+  };
+  ea->attrs[1] = (eattr) {
+    .id = EA_KRT_METRIC,
+    .type = EAF_TYPE_INT,
+    .u.data = s->krt_metric,
+  };
 
   if (s->scan)
-    krt_got_route(s->proto, e);
+    krt_got_route(s->proto, e, s->krt_src);
   else
-    krt_got_route_async(s->proto, e, s->new);
+    krt_got_route_async(s->proto, e, s->new, s->krt_src);
 
   s->net = NULL;
   s->attrs = NULL;
diff --git a/sysdep/unix/krt.c b/sysdep/unix/krt.c
index 0617ba43..995b65ed 100644
--- a/sysdep/unix/krt.c
+++ b/sysdep/unix/krt.c
@@ -277,22 +277,23 @@ static struct tbf rl_alien = TBF_DEFAULT_LOG_LIMITS;
  * the same key.
  */
 
+static inline u32
+krt_metric(rte *a)
+{
+  eattr *ea = ea_find(a->attrs->eattrs, EA_KRT_METRIC);
+  return ea ? ea->u.data : 0;
+}
+
 static inline int
 krt_same_key(rte *a, rte *b)
 {
-  return a->u.krt.metric == b->u.krt.metric;
+  return (krt_metric(a) == krt_metric(b));
 }
 
 static inline int
 krt_uptodate(rte *a, rte *b)
 {
-  if (a->attrs != b->attrs)
-    return 0;
-
-  if (a->u.krt.proto != b->u.krt.proto)
-    return 0;
-
-  return 1;
+  return (a->attrs == b->attrs);
 }
 
 static void
@@ -300,8 +301,6 @@ krt_learn_announce_update(struct krt_proto *p, rte *e)
 {
   rte e0 = {
     .attrs = rta_clone(e->attrs),
-    .pflags = EA_ID_FLAG(EA_KRT_SOURCE) | EA_ID_FLAG(EA_KRT_METRIC),
-    .u.krt = e->u.krt,
   };
 
   rte_update(p->p.main_channel, e->net->n.addr, &e0);
@@ -332,7 +331,7 @@ krt_learn_scan(struct krt_proto *p, rte *e)
 	{
 	  krt_trace_in_rl(&rl_alien, p, e, "[alien] seen");
 	  rte_free(e);
-	  m->u.krt.seen = 1;
+	  m->pflags |= KRT_REF_SEEN;
 	}
       else
 	{
@@ -348,7 +347,7 @@ krt_learn_scan(struct krt_proto *p, rte *e)
     {
       e->next = n->routes;
       n->routes = e;
-      e->u.krt.seen = 1;
+      e->pflags |= KRT_REF_SEEN;
     }
 }
 
@@ -378,24 +377,23 @@ again:
       ee = &n->routes;
       while (e = *ee)
 	{
-	  if (e->u.krt.best)
+	  if (e->pflags & KRT_REF_BEST)
 	    old_best = e;
 
-	  if (!e->u.krt.seen)
+	  if (!(e->pflags & KRT_REF_SEEN))
 	    {
 	      *ee = e->next;
 	      rte_free(e);
 	      continue;
 	    }
 
-	  if (!best || best->u.krt.metric > e->u.krt.metric)
+	  if (!best || krt_metric(best) > krt_metric(e))
 	    {
 	      best = e;
 	      pbest = ee;
 	    }
 
-	  e->u.krt.seen = 0;
-	  e->u.krt.best = 0;
+	  e->pflags &= ~(KRT_REF_SEEN | KRT_REF_BEST);
 	  ee = &e->next;
 	}
       if (!n->routes)
@@ -409,18 +407,18 @@ again:
 	  goto again;
 	}
 
-      best->u.krt.best = 1;
+      best->pflags |= KRT_REF_BEST;
       *pbest = best->next;
       best->next = n->routes;
       n->routes = best;
 
       if ((best != old_best) || p->reload)
 	{
-	  DBG("%I/%d: announcing (metric=%d)\n", n->n.prefix, n->n.pxlen, best->u.krt.metric);
+	  DBG("%I/%d: announcing (metric=%d)\n", n->n.prefix, n->n.pxlen, krt_metric(best));
 	  krt_learn_announce_update(p, best);
 	}
       else
-	DBG("%I/%d: uptodate (metric=%d)\n", n->n.prefix, n->n.pxlen, best->u.krt.metric);
+	DBG("%I/%d: uptodate (metric=%d)\n", n->n.prefix, n->n.pxlen, krt_metric(best));
     }
   FIB_ITERATE_END;
 
@@ -480,18 +478,18 @@ krt_learn_async(struct krt_proto *p, rte *e, int new)
   bestp = &n->routes;
   for(gg=&n->routes; g=*gg; gg=&g->next)
   {
-    if (best->u.krt.metric > g->u.krt.metric)
+    if (krt_metric(best) > krt_metric(g))
       {
 	best = g;
 	bestp = gg;
       }
 
-    g->u.krt.best = 0;
+    g->pflags &= ~KRT_REF_BEST;
   }
 
   if (best)
     {
-      best->u.krt.best = 1;
+      best->pflags |= KRT_REF_BEST;
       *bestp = best->next;
       best->next = n->routes;
       n->routes = best;
@@ -531,12 +529,6 @@ krt_dump(struct proto *P)
   rt_dump(&p->krt_table);
 }
 
-static void
-krt_dump_attrs(rte *e)
-{
-  debug(" [m=%d,p=%d]", e->u.krt.metric, e->u.krt.proto);
-}
-
 #endif
 
 /*
@@ -627,13 +619,13 @@ krt_same_dest(rte *k, rte *e)
  */
 
 void
-krt_got_route(struct krt_proto *p, rte *e)
+krt_got_route(struct krt_proto *p, rte *e, s8 src)
 {
   rte *new = NULL, *rt_free = NULL;
   net *n = e->net;
 
 #ifdef KRT_ALLOW_LEARN
-  switch (e->u.krt.src)
+  switch (src)
     {
     case KRT_SRC_KERNEL:
       goto ignore;
@@ -750,11 +742,11 @@ krt_prune(struct krt_proto *p)
 }
 
 void
-krt_got_route_async(struct krt_proto *p, rte *e, int new)
+krt_got_route_async(struct krt_proto *p, rte *e, int new, s8 src)
 {
   net *net = e->net;
 
-  switch (e->u.krt.src)
+  switch (src)
     {
     case KRT_SRC_BIRD:
       /* Should be filtered by the back end */
@@ -883,22 +875,6 @@ krt_scan_timer_kick(struct krt_proto *p)
  *	Updates
  */
 
-static void
-krt_make_tmp_attrs(struct rte *rt, struct linpool *pool)
-{
-  rte_init_tmp_attrs(rt, pool, 2);
-  rte_make_tmp_attr(rt, EA_KRT_SOURCE, EAF_TYPE_INT, rt->u.krt.proto);
-  rte_make_tmp_attr(rt, EA_KRT_METRIC, EAF_TYPE_INT, rt->u.krt.metric);
-}
-
-static void
-krt_store_tmp_attrs(struct rte *rt, struct linpool *pool)
-{
-  rte_init_tmp_attrs(rt, pool, 2);
-  rt->u.krt.proto = rte_store_tmp_attr(rt, EA_KRT_SOURCE);
-  rt->u.krt.metric = rte_store_tmp_attr(rt, EA_KRT_METRIC);
-}
-
 static int
 krt_preexport(struct proto *P, rte **new, struct linpool *pool UNUSED)
 {
@@ -980,14 +956,6 @@ krt_feed_end(struct channel *C)
 }
 
 
-static int
-krt_rte_same(rte *a, rte *b)
-{
-  /* src is always KRT_SRC_ALIEN and type is irrelevant */
-  return (a->u.krt.proto == b->u.krt.proto) && (a->u.krt.metric == b->u.krt.metric);
-}
-
-
 /*
  *	Protocol glue
  */
@@ -1042,9 +1010,6 @@ krt_init(struct proto_config *CF)
   p->p.if_notify = krt_if_notify;
   p->p.reload_routes = krt_reload_routes;
   p->p.feed_end = krt_feed_end;
-  p->p.make_tmp_attrs = krt_make_tmp_attrs;
-  p->p.store_tmp_attrs = krt_store_tmp_attrs;
-  p->p.rte_same = krt_rte_same;
 
   krt_sys_init(p);
   return &p->p;
@@ -1202,6 +1167,5 @@ struct protocol proto_unix_kernel = {
   .get_attr =		krt_get_attr,
 #ifdef KRT_ALLOW_LEARN
   .dump =		krt_dump,
-  .dump_attrs =		krt_dump_attrs,
 #endif
 };
diff --git a/sysdep/unix/krt.h b/sysdep/unix/krt.h
index 4a5d10d2..310a2d11 100644
--- a/sysdep/unix/krt.h
+++ b/sysdep/unix/krt.h
@@ -24,6 +24,9 @@ struct kif_proto;
 #define EA_KRT_SOURCE	EA_CODE(PROTOCOL_KERNEL, 0)
 #define EA_KRT_METRIC	EA_CODE(PROTOCOL_KERNEL, 1)
 
+#define KRT_REF_SEEN	0x1	/* Seen in table */
+#define KRT_REF_BEST	0x2	/* Best in table */
+
 /* Whenever we recognize our own routes, we allow learing of foreign routes */
 
 #ifdef CONFIG_SELF_CONSCIOUS
@@ -76,8 +79,8 @@ extern pool *krt_pool;
 
 struct proto_config * kif_init_config(int class);
 void kif_request_scan(void);
-void krt_got_route(struct krt_proto *p, struct rte *e);
-void krt_got_route_async(struct krt_proto *p, struct rte *e, int new);
+void krt_got_route(struct krt_proto *p, struct rte *e, s8 src);
+void krt_got_route_async(struct krt_proto *p, struct rte *e, int new, s8 src);
 
 static inline int
 krt_get_sync_error(struct krt_proto *p, struct rte *e)