diff --git a/filter/config.Y b/filter/config.Y
index f27fbbaa..15b77761 100644
--- a/filter/config.Y
+++ b/filter/config.Y
@@ -248,10 +248,6 @@ assert_assign(struct f_lval *lval, struct f_inst *expr, const char *start, const
       setter = f_new_inst(FI_VAR_SET, expr, lval->sym);
       getter = f_new_inst(FI_VAR_GET, lval->sym);
       break;
-    case F_LVAL_PREFERENCE:
-      setter = f_new_inst(FI_PREF_SET, expr);
-      getter = f_new_inst(FI_PREF_GET);
-      break;
     case F_LVAL_SA:
       setter = f_new_inst(FI_RTA_SET, expr, lval->sa);
       getter = f_new_inst(FI_RTA_GET, lval->sa);
@@ -759,6 +755,7 @@ static_attr:
  | IFNAME  { $$ = f_new_static_attr(T_STRING,     SA_IFNAME,	0); }
  | IFINDEX { $$ = f_new_static_attr(T_INT,        SA_IFINDEX,	1); }
  | WEIGHT  { $$ = f_new_static_attr(T_INT,        SA_WEIGHT,	0); }
+ | PREFERENCE { $$ = f_new_static_attr(T_INT,	  SA_PREF,	0); }
  | GW_MPLS { $$ = f_new_static_attr(T_INT,        SA_GW_MPLS,	0); }
  ;
 
@@ -785,8 +782,6 @@ term:
  | constant { $$ = $1; }
  | constructor { $$ = $1; }
 
- | PREFERENCE { $$ = f_new_inst(FI_PREF_GET); }
-
  | static_attr { $$ = f_new_inst(FI_RTA_GET, $1); }
 
  | dynamic_attr { $$ = f_new_inst(FI_EA_GET, $1); }
@@ -884,9 +879,6 @@ cmd:
        cf_error( "This static attribute is read-only.");
      $$ = f_new_inst(FI_RTA_SET, $3, $1);
    }
- | PREFERENCE '=' term ';' {
-     $$ = f_new_inst(FI_PREF_SET, $3);
-   }
  | UNSET '(' dynamic_attr ')' ';' {
      $$ = f_new_inst(FI_EA_UNSET, $3);
    }
@@ -929,7 +921,6 @@ get_cf_position:
 
 lvalue:
    CF_SYM_KNOWN { cf_assert_symbol($1, SYM_VARIABLE); $$ = (struct f_lval) { .type = F_LVAL_VARIABLE, .sym = $1 }; }
- | PREFERENCE { $$ = (struct f_lval) { .type = F_LVAL_PREFERENCE }; }
  | static_attr { $$ = (struct f_lval) { .type = F_LVAL_SA, .sa = $1 }; }
  | dynamic_attr { $$ = (struct f_lval) { .type = F_LVAL_EA, .da = $1 }; };
 
diff --git a/filter/data.h b/filter/data.h
index 4cb6b7a8..6d588204 100644
--- a/filter/data.h
+++ b/filter/data.h
@@ -100,6 +100,7 @@ enum f_sa_code {
   SA_IFNAME,
   SA_IFINDEX,
   SA_WEIGHT,
+  SA_PREF,
   SA_GW_MPLS,
 } PACKED;
 
diff --git a/filter/f-inst.c b/filter/f-inst.c
index a88021e6..83d86295 100644
--- a/filter/f-inst.c
+++ b/filter/f-inst.c
@@ -526,13 +526,14 @@
       case SA_FROM:	RESULT(sa.f_type, ip, rta->from); break;
       case SA_GW:	RESULT(sa.f_type, ip, rta->nh.gw); break;
       case SA_NET:	RESULT(sa.f_type, net, (*fs->rte)->net->n.addr); break;
-      case SA_PROTO:	RESULT(sa.f_type, s, rta->src->proto->name); break;
+      case SA_PROTO:	RESULT(sa.f_type, s, (*fs->rte)->src->proto->name); break;
       case SA_SOURCE:	RESULT(sa.f_type, i, rta->source); break;
       case SA_SCOPE:	RESULT(sa.f_type, i, rta->scope); break;
       case SA_DEST:	RESULT(sa.f_type, i, rta->dest); break;
       case SA_IFNAME:	RESULT(sa.f_type, s, rta->nh.iface ? rta->nh.iface->name : ""); break;
       case SA_IFINDEX:	RESULT(sa.f_type, i, rta->nh.iface ? rta->nh.iface->index : 0); break;
       case SA_WEIGHT:	RESULT(sa.f_type, i, rta->nh.weight + 1); break;
+      case SA_PREF:	RESULT(sa.f_type, i, rta->pref); break;
       case SA_GW_MPLS:	RESULT(sa.f_type, i, rta->nh.labels ? rta->nh.label[0] : MPLS_NULL); break;
 
       default:
@@ -561,7 +562,7 @@
 	{
 	  ip_addr ip = v1.val.ip;
 	  struct iface *ifa = ipa_is_link_local(ip) ? rta->nh.iface : NULL;
-	  neighbor *n = neigh_find(rta->src->proto, ip, ifa, 0);
+	  neighbor *n = neigh_find((*fs->rte)->src->proto, ip, ifa, 0);
 	  if (!n || (n->scope == SCOPE_HOST))
 	    runtime( "Invalid gw address" );
 
@@ -637,6 +638,10 @@
         }
 	break;
 
+      case SA_PREF:
+	rta->pref = v1.val.i;
+	break;
+
       default:
 	bug("Invalid static attribute access (%u/%u)", sa.f_type, sa.sa_code);
       }
@@ -804,20 +809,6 @@
     }
   }
 
-  INST(FI_PREF_GET, 0, 1) {
-    ACCESS_RTE;
-    RESULT(T_INT, i, (*fs->rte)->pref);
-  }
-
-  INST(FI_PREF_SET, 1, 0) {
-    ACCESS_RTE;
-    ARG(1,T_INT);
-    if (v1.val.i > 0xFFFF)
-      runtime( "Setting preference value out of bounds" );
-    f_rte_cow(fs);
-    (*fs->rte)->pref = v1.val.i;
-  }
-
   INST(FI_LENGTH, 1, 1) {	/* Get length of */
     ARG_ANY(1);
     switch(v1.type) {
diff --git a/lib/hash.h b/lib/hash.h
index ea4ca6dd..8febb33f 100644
--- a/lib/hash.h
+++ b/lib/hash.h
@@ -215,6 +215,12 @@ mem_hash_mix(u64 *h, const void *p, uint s)
     *h = *h * multiplier + pp[i];
 }
 
+static inline void
+mem_hash_mix_num(u64 *h, u64 val)
+{
+  mem_hash_mix(h, &val, sizeof(val));
+}
+
 static inline uint
 mem_hash_value(u64 *h)
 {
diff --git a/nest/route.h b/nest/route.h
index 75890a71..19c13538 100644
--- a/nest/route.h
+++ b/nest/route.h
@@ -255,12 +255,12 @@ struct hostentry {
 typedef struct rte {
   struct rte *next;
   net *net;				/* Network this RTE belongs to */
+  struct rte_src *src;			/* Route source that created the route */
   struct channel *sender;		/* Channel used to send the route to the routing table */
   struct rta *attrs;			/* Attributes of this route */
   u32 id;				/* Table specific route id */
   byte flags;				/* Flags (REF_...) */
   byte pflags;				/* Protocol-specific flags */
-  word pref;				/* Route preference */
   btime lastmod;			/* Last modified */
   union {				/* Protocol-dependent data (metrics etc.) */
 #ifdef CONFIG_RIP
@@ -352,7 +352,7 @@ net *net_get(rtable *tab, const net_addr *addr);
 net *net_route(rtable *tab, const net_addr *n);
 int net_roa_check(rtable *tab, const net_addr *n, u32 asn);
 rte *rte_find(net *net, struct rte_src *src);
-rte *rte_get_temp(struct rta *);
+rte *rte_get_temp(struct rta *, struct rte_src *src);
 void rte_update2(struct channel *c, const net_addr *n, rte *new, struct rte_src *src);
 /* rte_update() moved to protocol.h to avoid dependency conflicts */
 int rt_examine(rtable *t, net_addr *a, struct proto *p, const struct filter *filter);
@@ -487,14 +487,14 @@ typedef struct rta {
   u32 uc;				/* Use count */
   u32 hash_key;				/* Hash over important fields */
   struct ea_list *eattrs;		/* Extended Attribute chain */
-  struct rte_src *src;			/* Route source that created the route */
   struct hostentry *hostentry;		/* Hostentry for recursive next-hops */
   ip_addr from;				/* Advertising router */
   u32 igp_metric;			/* IGP metric to next hop (for iBGP routes) */
-  u8 source;				/* Route source (RTS_...) */
-  u8 scope;				/* Route scope (SCOPE_... -- see ip.h) */
-  u8 dest;				/* Route destination type (RTD_...) */
-  u8 aflags;
+  u16 cached:1;				/* Are attributes cached? */
+  u16 source:7;				/* Route source (RTS_...) */
+  u16 scope:4;				/* Route scope (SCOPE_... -- see ip.h) */
+  u16 dest:4;				/* Route destination type (RTD_...) */
+  word pref;
   struct nexthop nh;			/* Next hop */
 } rta;
 
@@ -516,11 +516,6 @@ typedef struct rta {
 #define RTS_PERF 15			/* Perf checker */
 #define RTS_MAX 16
 
-#define RTC_UNICAST 0
-#define RTC_BROADCAST 1
-#define RTC_MULTICAST 2
-#define RTC_ANYCAST 3			/* IPv6 Anycast */
-
 #define RTD_NONE 0			/* Undefined next hop */
 #define RTD_UNICAST 1			/* Next hop is neighbor router */
 #define RTD_BLACKHOLE 2			/* Silently drop packets */
@@ -528,8 +523,6 @@ typedef struct rta {
 #define RTD_PROHIBIT 4			/* Administratively prohibited */
 #define RTD_MAX 5
 
-#define RTAF_CACHED 1			/* This is a cached rta */
-
 #define IGP_METRIC_UNKNOWN 0x80000000	/* Default igp_metric used when no other
 					   protocol-specific metric is availabe */
 
@@ -718,7 +711,7 @@ void rta_init(void);
 static inline size_t rta_size(const rta *a) { return sizeof(rta) + sizeof(u32)*a->nh.labels; }
 #define RTA_MAX_SIZE (sizeof(rta) + sizeof(u32)*MPLS_MAX_LABEL_STACK)
 rta *rta_lookup(rta *);			/* Get rta equivalent to this one, uc++ */
-static inline int rta_is_cached(rta *r) { return r->aflags & RTAF_CACHED; }
+static inline int rta_is_cached(rta *r) { return r->cached; }
 static inline rta *rta_clone(rta *r) { r->uc++; return r; }
 void rta__free(rta *r);
 static inline void rta_free(rta *r) { if (r && !--r->uc) rta__free(r); }
diff --git a/nest/rt-attr.c b/nest/rt-attr.c
index c630aa95..4057bf37 100644
--- a/nest/rt-attr.c
+++ b/nest/rt-attr.c
@@ -1104,13 +1104,14 @@ rta_hash(rta *a)
   u64 h;
   mem_hash_init(&h);
 #define MIX(f) mem_hash_mix(&h, &(a->f), sizeof(a->f));
-  MIX(src);
+#define BMIX(f) mem_hash_mix_num(&h, a->f);
   MIX(hostentry);
   MIX(from);
   MIX(igp_metric);
-  MIX(source);
-  MIX(scope);
-  MIX(dest);
+  BMIX(source);
+  BMIX(scope);
+  BMIX(dest);
+  MIX(pref);
 #undef MIX
 
   return mem_hash_value(&h) ^ nexthop_hash(&(a->nh)) ^ ea_hash(a->eattrs);
@@ -1119,8 +1120,7 @@ rta_hash(rta *a)
 static inline int
 rta_same(rta *x, rta *y)
 {
-  return (x->src == y->src &&
-	  x->source == y->source &&
+  return (x->source == y->source &&
 	  x->scope == y->scope &&
 	  x->dest == y->dest &&
 	  x->igp_metric == y->igp_metric &&
@@ -1198,7 +1198,7 @@ rta_lookup(rta *o)
   rta *r;
   uint h;
 
-  ASSERT(!(o->aflags & RTAF_CACHED));
+  ASSERT(!o->cached);
   if (o->eattrs)
     ea_normalize(o->eattrs);
 
@@ -1209,8 +1209,7 @@ rta_lookup(rta *o)
 
   r = rta_copy(o);
   r->hash_key = h;
-  r->aflags = RTAF_CACHED;
-  rt_lock_source(r->src);
+  r->cached = 1;
   rt_lock_hostentry(r->hostentry);
   rta_insert(r);
 
@@ -1223,17 +1222,16 @@ rta_lookup(rta *o)
 void
 rta__free(rta *a)
 {
-  ASSERT(rta_cache_count && (a->aflags & RTAF_CACHED));
+  ASSERT(rta_cache_count && a->cached);
   rta_cache_count--;
   *a->pprev = a->next;
   if (a->next)
     a->next->pprev = a->pprev;
   rt_unlock_hostentry(a->hostentry);
-  rt_unlock_source(a->src);
   if (a->nh.next)
     nexthop_free(a->nh.next);
   ea_free(a->eattrs);
-  a->aflags = 0;		/* Poison the entry */
+  a->cached = 0;
   sl_free(rta_slab(a), a);
 }
 
@@ -1248,7 +1246,7 @@ rta_do_cow(rta *o, linpool *lp)
       memcpy(*nhn, nho, nexthop_size(nho));
       nhn = &((*nhn)->next);
     }
-  r->aflags = 0;
+  r->cached = 0;
   r->uc = 0;
   return r;
 }
@@ -1268,10 +1266,10 @@ rta_dump(rta *a)
 			 "RTS_OSPF_EXT2", "RTS_BGP", "RTS_PIPE", "RTS_BABEL" };
   static char *rtd[] = { "", " DEV", " HOLE", " UNREACH", " PROHIBIT" };
 
-  debug("p=%s uc=%d %s %s%s h=%04x",
-	a->src->proto->name, a->uc, rts[a->source], ip_scope_text(a->scope),
+  debug("pref=%d uc=%d %s %s%s h=%04x",
+	a->pref, a->uc, rts[a->source], ip_scope_text(a->scope),
 	rtd[a->dest], a->hash_key);
-  if (!(a->aflags & RTAF_CACHED))
+  if (!a->cached)
     debug(" !CACHED");
   debug(" <-%I", a->from);
   if (a->dest == RTD_UNICAST)
diff --git a/nest/rt-dev.c b/nest/rt-dev.c
index 61f025ce..e2e65926 100644
--- a/nest/rt-dev.c
+++ b/nest/rt-dev.c
@@ -83,7 +83,7 @@ dev_ifa_notify(struct proto *P, uint flags, struct ifa *ad)
       struct rte_src *src = rt_get_source(P, ad->iface->index);
 
       rta a0 = {
-	.src = src,
+	.pref = c->preference,
 	.source = RTS_DEVICE,
 	.scope = SCOPE_UNIVERSE,
 	.dest = RTD_UNICAST,
@@ -91,7 +91,7 @@ dev_ifa_notify(struct proto *P, uint flags, struct ifa *ad)
       };
 
       a = rta_lookup(&a0);
-      e = rte_get_temp(a);
+      e = rte_get_temp(a, src);
       e->pflags = 0;
       rte_update2(c, net, e, src);
     }
diff --git a/nest/rt-show.c b/nest/rt-show.c
index b24befa2..35342180 100644
--- a/nest/rt-show.c
+++ b/nest/rt-show.c
@@ -57,17 +57,17 @@ rt_show_rte(struct cli *c, byte *ia, rte *e, struct rt_show_data *d, int primary
   if (d->verbose && !rta_is_cached(a) && a->eattrs)
     ea_normalize(a->eattrs);
 
-  get_route_info = a->src->proto->proto->get_route_info;
+  get_route_info = e->src->proto->proto->get_route_info;
   if (get_route_info)
     get_route_info(e, info);
   else
-    bsprintf(info, " (%d)", e->pref);
+    bsprintf(info, " (%d)", a->pref);
 
   if (d->last_table != d->tab)
     rt_show_table(c, d);
 
   cli_printf(c, -1007, "%-20s %s [%s %s%s]%s%s", ia, rta_dest_name(a->dest),
-	     a->src->proto->name, tm, from, primary ? (sync_error ? " !" : " *") : "", info);
+	     e->src->proto->name, tm, from, primary ? (sync_error ? " !" : " *") : "", info);
 
   if (a->dest == RTD_UNICAST)
     for (nh = &(a->nh); nh; nh = nh->next)
@@ -180,7 +180,7 @@ rt_show_net(struct cli *c, net *n, struct rt_show_data *d)
 	    }
 	}
 
-      if (d->show_protocol && (d->show_protocol != e->attrs->src->proto))
+      if (d->show_protocol && (d->show_protocol != e->src->proto))
 	goto skip;
 
       if (f_run(d->filter, &e, c->show_pool, 0) > F_ACCEPT)
diff --git a/nest/rt-table.c b/nest/rt-table.c
index 36bf1364..65ff2a59 100644
--- a/nest/rt-table.c
+++ b/nest/rt-table.c
@@ -548,7 +548,7 @@ rte_find(net *net, struct rte_src *src)
 {
   rte *e = net->routes;
 
-  while (e && e->attrs->src != src)
+  while (e && e->src != src)
     e = e->next;
   return e;
 }
@@ -563,14 +563,14 @@ rte_find(net *net, struct rte_src *src)
  * the protocol.
  */
 rte *
-rte_get_temp(rta *a)
+rte_get_temp(rta *a, struct rte_src *src)
 {
   rte *e = sl_alloc(rte_slab);
 
   e->attrs = a;
   e->id = 0;
   e->flags = 0;
-  e->pref = 0;
+  rt_lock_source(e->src = src);
   return e;
 }
 
@@ -580,6 +580,8 @@ rte_do_cow(rte *r)
   rte *e = sl_alloc(rte_slab);
 
   memcpy(e, r, sizeof(rte));
+
+  rt_lock_source(e->src);
   e->attrs = rta_clone(r->attrs);
   e->flags = 0;
   return e;
@@ -626,6 +628,7 @@ rte_cow_rta(rte *r, linpool *lp)
 void
 rte_free(rte *e)
 {
+  rt_unlock_source(e->src);
   if (rta_is_cached(e->attrs))
     rta_free(e->attrs);
   sl_free(rte_slab, e);
@@ -634,6 +637,7 @@ rte_free(rte *e)
 static inline void
 rte_free_quick(rte *e)
 {
+  rt_unlock_source(e->src);
   rta_free(e->attrs);
   sl_free(rte_slab, e);
 }
@@ -758,7 +762,7 @@ void
 rte_make_tmp_attrs(rte **r, linpool *lp, rta **old_attrs)
 {
   void (*make_tmp_attrs)(rte *r, linpool *lp);
-  make_tmp_attrs = (*r)->attrs->src->proto->make_tmp_attrs;
+  make_tmp_attrs = (*r)->src->proto->make_tmp_attrs;
 
   if (!make_tmp_attrs)
     return;
@@ -787,7 +791,7 @@ static void
 rte_store_tmp_attrs(rte *r, linpool *lp, rta *old_attrs)
 {
   void (*store_tmp_attrs)(rte *rt, linpool *lp);
-  store_tmp_attrs = r->attrs->src->proto->store_tmp_attrs;
+  store_tmp_attrs = r->src->proto->store_tmp_attrs;
 
   if (!store_tmp_attrs)
     return;
@@ -817,20 +821,20 @@ rte_better(rte *new, rte *old)
   if (!rte_is_valid(new))
     return 0;
 
-  if (new->pref > old->pref)
+  if (new->attrs->pref > old->attrs->pref)
     return 1;
-  if (new->pref < old->pref)
+  if (new->attrs->pref < old->attrs->pref)
     return 0;
-  if (new->attrs->src->proto->proto != old->attrs->src->proto->proto)
+  if (new->src->proto->proto != old->src->proto->proto)
     {
       /*
        *  If the user has configured protocol preferences, so that two different protocols
        *  have the same preference, try to break the tie by comparing addresses. Not too
        *  useful, but keeps the ordering of routes unambiguous.
        */
-      return new->attrs->src->proto->proto > old->attrs->src->proto->proto;
+      return new->src->proto->proto > old->src->proto->proto;
     }
-  if (better = new->attrs->src->proto->rte_better)
+  if (better = new->src->proto->rte_better)
     return better(new, old);
   return 0;
 }
@@ -843,13 +847,13 @@ rte_mergable(rte *pri, rte *sec)
   if (!rte_is_valid(pri) || !rte_is_valid(sec))
     return 0;
 
-  if (pri->pref != sec->pref)
+  if (pri->attrs->pref != sec->attrs->pref)
     return 0;
 
-  if (pri->attrs->src->proto->proto != sec->attrs->src->proto->proto)
+  if (pri->src->proto->proto != sec->src->proto->proto)
     return 0;
 
-  if (mergable = pri->attrs->src->proto->rte_mergable)
+  if (mergable = pri->src->proto->rte_mergable)
     return mergable(pri, sec);
 
   return 0;
@@ -1377,8 +1381,8 @@ rte_same(rte *x, rte *y)
   return
     x->attrs == y->attrs &&
     x->pflags == y->pflags &&
-    x->pref == y->pref &&
-    (!x->attrs->src->proto->rte_same || x->attrs->src->proto->rte_same(x, y)) &&
+    x->src == y->src &&
+    (!x->src->proto->rte_same || x->src->proto->rte_same(x, y)) &&
     rte_is_filtered(x) == rte_is_filtered(y);
 }
 
@@ -1399,7 +1403,7 @@ rte_recalculate(struct channel *c, net *net, rte *new, struct rte_src *src)
   k = &net->routes;			/* Find and remove original route from the same protocol */
   while (old = *k)
     {
-      if (old->attrs->src == src)
+      if (old->src == src)
 	{
 	  /* If there is the same route in the routing table but from
 	   * a different sender, then there are two paths from the
@@ -1766,9 +1770,6 @@ rte_update2(struct channel *c, const net_addr *n, rte *new, struct rte_src *src)
       new->net = nn;
       new->sender = c;
 
-      if (!new->pref)
-	new->pref = c->preference;
-
       stats->imp_updates_received++;
       if (!rte_validate(new))
 	{
@@ -1863,7 +1864,7 @@ static inline void
 rte_discard(rte *old)	/* Non-filtered route deletion, used during garbage collection */
 {
   rte_update_lock();
-  rte_recalculate(old->sender, old->net, NULL, old->attrs->src);
+  rte_recalculate(old->sender, old->net, NULL, old->src);
   rte_update_unlock();
 }
 
@@ -1883,7 +1884,7 @@ rte_modify(rte *old)
       new->flags = (old->flags & ~REF_MODIFY) | REF_COW;
     }
 
-    rte_recalculate(old->sender, old->net, new, old->attrs->src);
+    rte_recalculate(old->sender, old->net, new, old->src);
   }
 
   rte_update_unlock();
@@ -2007,10 +2008,10 @@ rte_dump(rte *e)
 {
   net *n = e->net;
   debug("%-1N ", n->n.addr);
-  debug("PF=%02x pref=%d ", e->pflags, e->pref);
+  debug("PF=%02x ", e->pflags);
   rta_dump(e->attrs);
-  if (e->attrs->src->proto->proto->dump_attrs)
-    e->attrs->src->proto->proto->dump_attrs(e);
+  if (e->src->proto->proto->dump_attrs)
+    e->src->proto->proto->dump_attrs(e);
   debug("\n");
 }
 
@@ -2724,11 +2725,12 @@ rt_next_hop_update_rte(rtable *tab UNUSED, rte *old)
   memcpy(mls.stack, &a->nh.label[a->nh.labels - mls.len], mls.len * sizeof(u32));
 
   rta_apply_hostentry(a, old->attrs->hostentry, &mls);
-  a->aflags = 0;
+  a->cached = 0;
 
   rte *e = sl_alloc(rte_slab);
   memcpy(e, old, sizeof(rte));
   e->attrs = rta_lookup(a);
+  rt_lock_source(e->src);
 
   return e;
 }
@@ -2856,7 +2858,7 @@ rt_flowspec_update_rte(rtable *tab, rte *r)
     return NULL;
 
   const net_addr *n = r->net->n.addr;
-  struct bgp_proto *p = (void *) r->attrs->src->proto;
+  struct bgp_proto *p = (void *) r->src->proto;
   int valid = rt_flowspec_check(r->u.bgp.base_table, tab, n, r->attrs, p->is_interior);
   int dest = valid ? RTD_NONE : RTD_UNREACHABLE;
 
@@ -2866,7 +2868,7 @@ rt_flowspec_update_rte(rtable *tab, rte *r)
   rta *a = alloca(RTA_MAX_SIZE);
   memcpy(a, r->attrs, rta_size(r->attrs));
   a->dest = dest;
-  a->aflags = 0;
+  a->cached = 0;
 
   rte *new = sl_alloc(rte_slab);
   memcpy(new, r, sizeof(rte));
@@ -2906,8 +2908,8 @@ rt_next_hop_update_net(rtable *tab, net *n)
 
 	/* Call a pre-comparison hook */
 	/* Not really an efficient way to compute this */
-	if (e->attrs->src->proto->rte_recalculate)
-	  e->attrs->src->proto->rte_recalculate(tab, n, new, e, NULL);
+	if (e->src->proto->rte_recalculate)
+	  e->src->proto->rte_recalculate(tab, n, new, e, NULL);
 
 	if (e != old_best)
 	  rte_free_quick(e);
@@ -3240,9 +3242,6 @@ rte_update_in(struct channel *c, const net_addr *n, rte *new, struct rte_src *sr
   {
     net = net_get(tab, n);
 
-    if (!new->pref)
-      new->pref = c->preference;
-
     if (!rta_is_cached(new->attrs))
       new->attrs = rta_lookup(new->attrs);
   }
@@ -3256,7 +3255,7 @@ rte_update_in(struct channel *c, const net_addr *n, rte *new, struct rte_src *sr
 
   /* Find the old rte */
   for (pos = &net->routes; old = *pos; pos = &old->next)
-    if (old->attrs->src == src)
+    if (old->src == src)
     {
       if (new && rte_same(old, new))
       {
@@ -3361,7 +3360,7 @@ rt_reload_channel(struct channel *c)
 	return 0;
       }
 
-      rte_update2(c, e->net->n.addr, rte_do_cow(e), e->attrs->src);
+      rte_update2(c, e->net->n.addr, rte_do_cow(e), e->src);
     }
 
     c->reload_next_rte = NULL;
@@ -3444,7 +3443,7 @@ rte_update_out(struct channel *c, const net_addr *n, rte *new, rte *old0, rte **
   if (new)
   {
     net = net_get(tab, n);
-    src = new->attrs->src;
+    src = new->src;
 
     rte_store_tmp_attrs(new, rte_update_pool, NULL);
 
@@ -3454,7 +3453,7 @@ rte_update_out(struct channel *c, const net_addr *n, rte *new, rte *old0, rte **
   else
   {
     net = net_find(tab, n);
-    src = old0->attrs->src;
+    src = old0->src;
 
     if (!net)
       goto drop_withdraw;
@@ -3462,7 +3461,7 @@ rte_update_out(struct channel *c, const net_addr *n, rte *new, rte *old0, rte **
 
   /* Find the old rte */
   for (pos = &net->routes; old = *pos; pos = &old->next)
-    if ((c->ra_mode != RA_ANY) || (old->attrs->src == src))
+    if ((c->ra_mode != RA_ANY) || (old->src == src))
     {
       if (new && rte_same(old, new))
       {
diff --git a/proto/babel/babel.c b/proto/babel/babel.c
index 0444e7a4..09d8ad7e 100644
--- a/proto/babel/babel.c
+++ b/proto/babel/babel.c
@@ -641,10 +641,10 @@ babel_announce_rte(struct babel_proto *p, struct babel_entry *e)
   if (r)
   {
     rta a0 = {
-      .src = p->p.main_source,
       .source = RTS_BABEL,
       .scope = SCOPE_UNIVERSE,
       .dest = RTD_UNICAST,
+      .pref = c->preference,
       .from = r->neigh->addr,
       .nh.gw = r->next_hop,
       .nh.iface = r->neigh->ifa->iface,
@@ -659,7 +659,7 @@ babel_announce_rte(struct babel_proto *p, struct babel_entry *e)
       a0.nh.flags = RNF_ONLINK;
 
     rta *a = rta_lookup(&a0);
-    rte *rte = rte_get_temp(a);
+    rte *rte = rte_get_temp(a, p->p.main_source);
     rte->u.babel.seqno = r->seqno;
     rte->u.babel.metric = r->metric;
     rte->u.babel.router_id = r->router_id;
@@ -672,17 +672,16 @@ babel_announce_rte(struct babel_proto *p, struct babel_entry *e)
   {
     /* Unreachable */
     rta a0 = {
-      .src = p->p.main_source,
       .source = RTS_BABEL,
       .scope = SCOPE_UNIVERSE,
       .dest = RTD_UNREACHABLE,
+      .pref = 1,
     };
 
     rta *a = rta_lookup(&a0);
-    rte *rte = rte_get_temp(a);
+    rte *rte = rte_get_temp(a, p->p.main_source);
     memset(&rte->u.babel, 0, sizeof(rte->u.babel));
     rte->pflags = 0;
-    rte->pref = 1;
 
     e->unreachable = 1;
     rte_update2(c, e->n.addr, rte, p->p.main_source);
@@ -2010,7 +2009,7 @@ babel_dump(struct proto *P)
 static void
 babel_get_route_info(rte *rte, byte *buf)
 {
-  buf += bsprintf(buf, " (%d/%d) [%lR]", rte->pref, rte->u.babel.metric, rte->u.babel.router_id);
+  buf += bsprintf(buf, " (%d/%d) [%lR]", rte->attrs->pref, rte->u.babel.metric, rte->u.babel.router_id);
 }
 
 static int
@@ -2235,7 +2234,7 @@ babel_preexport(struct proto *P, struct rte *new)
 {
   struct rta *a = new->attrs;
   /* Reject our own unreachable routes */
-  if ((a->dest == RTD_UNREACHABLE) && (a->src->proto == P))
+  if ((a->dest == RTD_UNREACHABLE) && (new->src->proto == P))
     return -1;
 
   return 0;
@@ -2276,7 +2275,7 @@ babel_rt_notify(struct proto *P, struct channel *c UNUSED, struct network *net,
   if (new)
   {
     /* Update */
-    uint internal = (new->attrs->src->proto == P);
+    uint internal = (new->src->proto == P);
     uint rt_seqno = internal ? new->u.babel.seqno : p->update_seqno;
     uint rt_metric = ea_get_int(new->attrs->eattrs, EA_BABEL_METRIC, 0);
     u64 rt_router_id = internal ? new->u.babel.router_id : p->router_id;
diff --git a/proto/bgp/attrs.c b/proto/bgp/attrs.c
index c35f9384..09c0bc57 100644
--- a/proto/bgp/attrs.c
+++ b/proto/bgp/attrs.c
@@ -1670,7 +1670,7 @@ bgp_free_prefix(struct bgp_channel *c, struct bgp_prefix *px)
 int
 bgp_preexport(struct proto *P, rte *e)
 {
-  struct proto *SRC = e->attrs->src->proto;
+  struct proto *SRC = e->src->proto;
   struct bgp_proto *p = (struct bgp_proto *) P;
   struct bgp_proto *src = (SRC->proto == &proto_bgp) ? (struct bgp_proto *) SRC : NULL;
 
@@ -1729,7 +1729,7 @@ bgp_preexport(struct proto *P, rte *e)
 static ea_list *
 bgp_update_attrs(struct bgp_proto *p, struct bgp_channel *c, rte *e, ea_list *attrs0, struct linpool *pool)
 {
-  struct proto *SRC = e->attrs->src->proto;
+  struct proto *SRC = e->src->proto;
   struct bgp_proto *src = (SRC->proto == &proto_bgp) ? (void *) SRC : NULL;
   struct bgp_export_state s = { .proto = p, .channel = c, .pool = pool, .src = src, .route = e, .mpls = c->desc->mpls };
   ea_list *attrs = attrs0;
@@ -1861,12 +1861,12 @@ bgp_rt_notify(struct proto *P, struct channel *C, net *n, rte *new, rte *old)
 
     /* If attributes are invalid, we fail back to withdraw */
     buck = attrs ? bgp_get_bucket(c, attrs) : bgp_get_withdraw_bucket(c);
-    path = new->attrs->src->global_id;
+    path = new->src->global_id;
   }
   else
   {
     buck = bgp_get_withdraw_bucket(c);
-    path = old->attrs->src->global_id;
+    path = old->src->global_id;
   }
 
   px = bgp_get_prefix(c, n->n.addr, c->add_path_tx ? path : 0);
@@ -1886,7 +1886,7 @@ bgp_get_neighbor(rte *r)
     return as;
 
   /* If AS_PATH is not defined, we treat rte as locally originated */
-  struct bgp_proto *p = (void *) r->attrs->src->proto;
+  struct bgp_proto *p = (void *) r->src->proto;
   return p->cf->confederation ?: p->local_as;
 }
 
@@ -1906,8 +1906,8 @@ rte_stale(rte *r)
 int
 bgp_rte_better(rte *new, rte *old)
 {
-  struct bgp_proto *new_bgp = (struct bgp_proto *) new->attrs->src->proto;
-  struct bgp_proto *old_bgp = (struct bgp_proto *) old->attrs->src->proto;
+  struct bgp_proto *new_bgp = (struct bgp_proto *) new->src->proto;
+  struct bgp_proto *old_bgp = (struct bgp_proto *) old->src->proto;
   eattr *x, *y;
   u32 n, o;
 
@@ -2051,8 +2051,8 @@ bgp_rte_better(rte *new, rte *old)
 int
 bgp_rte_mergable(rte *pri, rte *sec)
 {
-  struct bgp_proto *pri_bgp = (struct bgp_proto *) pri->attrs->src->proto;
-  struct bgp_proto *sec_bgp = (struct bgp_proto *) sec->attrs->src->proto;
+  struct bgp_proto *pri_bgp = (struct bgp_proto *) pri->src->proto;
+  struct bgp_proto *sec_bgp = (struct bgp_proto *) sec->src->proto;
   eattr *x, *y;
   u32 p, s;
 
@@ -2130,13 +2130,13 @@ bgp_rte_mergable(rte *pri, rte *sec)
 static inline int
 same_group(rte *r, u32 lpref, u32 lasn)
 {
-  return (r->pref == lpref) && (bgp_get_neighbor(r) == lasn);
+  return (r->attrs->pref == lpref) && (bgp_get_neighbor(r) == lasn);
 }
 
 static inline int
 use_deterministic_med(rte *r)
 {
-  struct proto *P = r->attrs->src->proto;
+  struct proto *P = r->src->proto;
   return (P->proto == &proto_bgp) && ((struct bgp_proto *) P)->cf->deterministic_med;
 }
 
@@ -2145,7 +2145,7 @@ bgp_rte_recalculate(rtable *table, net *net, rte *new, rte *old, rte *old_best)
 {
   rte *r, *s;
   rte *key = new ? new : old;
-  u32 lpref = key->pref;
+  u32 lpref = key->attrs->pref;
   u32 lasn = bgp_get_neighbor(key);
   int old_suppressed = old ? old->u.bgp.suppressed : 0;
 
@@ -2368,7 +2368,7 @@ bgp_get_route_info(rte *e, byte *buf)
   eattr *o = ea_find(e->attrs->eattrs, EA_CODE(PROTOCOL_BGP, BA_ORIGIN));
   u32 origas;
 
-  buf += bsprintf(buf, " (%d", e->pref);
+  buf += bsprintf(buf, " (%d", e->attrs->pref);
 
   if (e->u.bgp.suppressed)
     buf += bsprintf(buf, "-");
diff --git a/proto/bgp/packets.c b/proto/bgp/packets.c
index 875808fb..1ab8c793 100644
--- a/proto/bgp/packets.c
+++ b/proto/bgp/packets.c
@@ -1386,8 +1386,6 @@ bgp_rte_update(struct bgp_parse_state *s, const net_addr *n, u32 path_id, rta *a
   /* Prepare cached route attributes */
   if (s->cached_rta == NULL)
   {
-    a0->src = s->last_src;
-
     /* Workaround for rta_lookup() breaking eattrs */
     ea_list *ea = a0->eattrs;
     s->cached_rta = rta_lookup(a0);
@@ -1395,7 +1393,7 @@ bgp_rte_update(struct bgp_parse_state *s, const net_addr *n, u32 path_id, rta *a
   }
 
   rta *a = rta_clone(s->cached_rta);
-  rte *e = rte_get_temp(a);
+  rte *e = rte_get_temp(a, s->last_src);
 
   e->pflags = 0;
   e->u.bgp.suppressed = 0;
@@ -2481,6 +2479,7 @@ bgp_decode_nlri(struct bgp_parse_state *s, u32 afi, byte *nlri, uint len, ea_lis
     a->scope = SCOPE_UNIVERSE;
     a->from = s->proto->remote_ip;
     a->eattrs = ea;
+    a->pref = c->c.preference;
 
     c->desc->decode_next_hop(s, nh, nh_len, a);
     bgp_finish_attrs(s, a);
diff --git a/proto/mrt/mrt.c b/proto/mrt/mrt.c
index 8d97c860..ed9ab325 100644
--- a/proto/mrt/mrt.c
+++ b/proto/mrt/mrt.c
@@ -472,9 +472,9 @@ mrt_rib_table_entry(struct mrt_table_dump_state *s, rte *r)
 
 #ifdef CONFIG_BGP
   /* Find peer index */
-  if (r->attrs->src->proto->proto == &proto_bgp)
+  if (r->src->proto->proto == &proto_bgp)
   {
-    struct bgp_proto *p = (void *) r->attrs->src->proto;
+    struct bgp_proto *p = (void *) r->src->proto;
     struct mrt_peer_entry *n =
       HASH_FIND(s->peer_hash, PEER, p->remote_id, p->remote_as, p->remote_ip);
 
@@ -488,7 +488,7 @@ mrt_rib_table_entry(struct mrt_table_dump_state *s, rte *r)
 
   /* Path Identifier */
   if (s->add_path)
-    mrt_put_u32(b, r->attrs->src->private_id);
+    mrt_put_u32(b, r->src->private_id);
 
   /* Route Attributes */
   mrt_put_u16(b, 0);
@@ -519,7 +519,7 @@ mrt_rib_table_dump(struct mrt_table_dump_state *s, net *n, int add_path)
       continue;
 
     /* Skip routes that should be reported in the other phase */
-    if (!s->always_add_path && (!rt->attrs->src->private_id != !s->add_path))
+    if (!s->always_add_path && (!rt->src->private_id != !s->add_path))
     {
       s->want_add_path = 1;
       continue;
diff --git a/proto/ospf/ospf.c b/proto/ospf/ospf.c
index 48e078ed..03b16350 100644
--- a/proto/ospf/ospf.c
+++ b/proto/ospf/ospf.c
@@ -490,7 +490,7 @@ ospf_preexport(struct proto *P, rte *e)
   struct ospf_area *oa = ospf_main_area(p);
 
   /* Reject our own routes */
-  if (e->attrs->src->proto == P)
+  if (e->src->proto == P)
     return -1;
 
   /* Do not export routes to stub areas */
@@ -609,7 +609,7 @@ ospf_get_route_info(rte * rte, byte * buf)
   }
 
   buf += bsprintf(buf, " %s", type);
-  buf += bsprintf(buf, " (%d/%d", rte->pref, rte->u.ospf.metric1);
+  buf += bsprintf(buf, " (%d/%d", rte->attrs->pref, rte->u.ospf.metric1);
   if (rte->attrs->source == RTS_OSPF_EXT2)
     buf += bsprintf(buf, "/%d", rte->u.ospf.metric2);
   buf += bsprintf(buf, ")");
diff --git a/proto/ospf/rt.c b/proto/ospf/rt.c
index faee49dc..cda464e0 100644
--- a/proto/ospf/rt.c
+++ b/proto/ospf/rt.c
@@ -2053,17 +2053,17 @@ again1:
     if (nf->n.type) /* Add the route */
     {
       rta a0 = {
-	.src = p->p.main_source,
 	.source = nf->n.type,
 	.scope = SCOPE_UNIVERSE,
 	.dest = RTD_UNICAST,
 	.nh = *(nf->n.nhs),
+	.pref = p->p.main_channel->preference,
       };
 
       if (reload || ort_changed(nf, &a0))
       {
 	rta *a = rta_lookup(&a0);
-	rte *e = rte_get_temp(a);
+	rte *e = rte_get_temp(a, p->p.main_source);
 
 	rta_free(nf->old_rta);
 	nf->old_rta = rta_clone(a);
diff --git a/proto/perf/perf.c b/proto/perf/perf.c
index ba401a8a..52784c14 100644
--- a/proto/perf/perf.c
+++ b/proto/perf/perf.c
@@ -143,10 +143,10 @@ perf_loop(void *data)
 
     if (!p->attrs_per_rte || !(i % p->attrs_per_rte)) {
       struct rta a0 = {
-	.src = p->p.main_source,
 	.source = RTS_PERF,
 	.scope = SCOPE_UNIVERSE,
 	.dest = RTD_UNICAST,
+	.pref = p->p.main_channel->preference,
 	.nh.iface = p->ifa->iface,
 	.nh.gw = gw,
 	.nh.weight = 1,
@@ -161,7 +161,7 @@ perf_loop(void *data)
   clock_gettime(CLOCK_MONOTONIC, &ts_generated);
 
   for (uint i=0; i<N; i++) {
-    rte *e = rte_get_temp(p->data[i].a);
+    rte *e = rte_get_temp(p->data[i].a, p->p.main_source);
     e->pflags = 0;
 
     rte_update(P, &(p->data[i].net), e);
diff --git a/proto/pipe/pipe.c b/proto/pipe/pipe.c
index cc4b5a07..636c3e58 100644
--- a/proto/pipe/pipe.c
+++ b/proto/pipe/pipe.c
@@ -65,34 +65,33 @@ pipe_rt_notify(struct proto *P, struct channel *src_ch, net *n, rte *new, rte *o
 
   if (new)
     {
+      src = new->src;
+
       a = alloca(rta_size(new->attrs));
       memcpy(a, new->attrs, rta_size(new->attrs));
 
-      a->aflags = 0;
+      a->cached = 0;
       a->hostentry = NULL;
-      e = rte_get_temp(a);
+      e = rte_get_temp(a, src);
       e->pflags = 0;
 
       /* Copy protocol specific embedded attributes. */
       memcpy(&(e->u), &(new->u), sizeof(e->u));
-      e->pref = new->pref;
       e->pflags = new->pflags;
 
 #ifdef CONFIG_BGP
       /* Hack to cleanup cached value */
-      if (e->attrs->src->proto->proto == &proto_bgp)
+      if (e->src->proto->proto == &proto_bgp)
       {
 	e->u.bgp.stale = -1;
 	e->u.bgp.base_table = NULL;
       }
 #endif
-
-      src = a->src;
     }
   else
     {
       e = NULL;
-      src = old->attrs->src;
+      src = old->src;
     }
 
   src_ch->table->pipe_busy = 1;
diff --git a/proto/rip/rip.c b/proto/rip/rip.c
index e1a235a0..f2e56e93 100644
--- a/proto/rip/rip.c
+++ b/proto/rip/rip.c
@@ -145,7 +145,7 @@ rip_announce_rte(struct rip_proto *p, struct rip_entry *en)
   {
     /* Update */
     rta a0 = {
-      .src = p->p.main_source,
+      .pref = p->p.main_channel->preference,
       .source = RTS_RIP,
       .scope = SCOPE_UNIVERSE,
       .dest = RTD_UNICAST,
@@ -189,7 +189,7 @@ rip_announce_rte(struct rip_proto *p, struct rip_entry *en)
     }
 
     rta *a = rta_lookup(&a0);
-    rte *e = rte_get_temp(a);
+    rte *e = rte_get_temp(a, p->p.main_source);
 
     e->u.rip.from = a0.nh.iface;
     e->u.rip.metric = rt_metric;
@@ -339,7 +339,7 @@ rip_rt_notify(struct proto *P, struct channel *ch UNUSED, struct network *net, s
     en->valid = RIP_ENTRY_VALID;
     en->metric = rt_metric;
     en->tag = rt_tag;
-    en->from = (new->attrs->src->proto == P) ? new->u.rip.from : NULL;
+    en->from = (new->src->proto == P) ? new->u.rip.from : NULL;
     en->iface = new->attrs->nh.iface;
     en->next_hop = new->attrs->nh.gw;
   }
@@ -1198,7 +1198,7 @@ rip_reconfigure(struct proto *P, struct proto_config *CF)
 static void
 rip_get_route_info(rte *rte, byte *buf)
 {
-  buf += bsprintf(buf, " (%d/%d)", rte->pref, rte->u.rip.metric);
+  buf += bsprintf(buf, " (%d/%d)", rte->attrs->pref, rte->u.rip.metric);
 
   if (rte->u.rip.tag)
     bsprintf(buf, " [%04x]", rte->u.rip.tag);
diff --git a/proto/rpki/rpki.c b/proto/rpki/rpki.c
index ab0837f3..be3d19ab 100644
--- a/proto/rpki/rpki.c
+++ b/proto/rpki/rpki.c
@@ -121,18 +121,18 @@ rpki_table_add_roa(struct rpki_cache *cache, struct channel *channel, const net_
   struct rpki_proto *p = cache->p;
 
   rta a0 = {
-    .src = p->p.main_source,
+    .pref = channel->preference,
     .source = RTS_RPKI,
     .scope = SCOPE_UNIVERSE,
     .dest = RTD_NONE,
   };
 
   rta *a = rta_lookup(&a0);
-  rte *e = rte_get_temp(a);
+  rte *e = rte_get_temp(a, p->p.main_source);
 
   e->pflags = 0;
 
-  rte_update2(channel, &pfxr->n, e, a0.src);
+  rte_update2(channel, &pfxr->n, e, e->src);
 }
 
 void
diff --git a/proto/static/static.c b/proto/static/static.c
index 2789c1bb..6d3871cc 100644
--- a/proto/static/static.c
+++ b/proto/static/static.c
@@ -56,10 +56,11 @@ static void
 static_announce_rte(struct static_proto *p, struct static_route *r)
 {
   rta *a = allocz(RTA_MAX_SIZE);
-  a->src = static_get_source(p, r->index);
+  struct rte_src *src = static_get_source(p, r->index);
   a->source = RTS_STATIC;
   a->scope = SCOPE_UNIVERSE;
   a->dest = r->dest;
+  a->pref = p->p.main_channel->preference;
 
   if (r->dest == RTD_UNICAST)
   {
@@ -102,7 +103,7 @@ static_announce_rte(struct static_proto *p, struct static_route *r)
     return;
 
   /* We skip rta_lookup() here */
-  rte *e = rte_get_temp(a);
+  rte *e = rte_get_temp(a, src);
   e->pflags = 0;
 
   if (r->cmds)
@@ -119,7 +120,7 @@ static_announce_rte(struct static_proto *p, struct static_route *r)
     e->net = NULL;
   }
 
-  rte_update2(p->p.main_channel, r->net, e, a->src);
+  rte_update2(p->p.main_channel, r->net, e, src);
   r->state = SRS_CLEAN;
 
   if (r->cmds)
@@ -131,7 +132,7 @@ withdraw:
   if (r->state == SRS_DOWN)
     return;
 
-  rte_update2(p->p.main_channel, r->net, NULL, a->src);
+  rte_update2(p->p.main_channel, r->net, NULL, src);
   r->state = SRS_DOWN;
 }
 
@@ -721,9 +722,9 @@ static_get_route_info(rte *rte, byte *buf)
 {
   eattr *a = ea_find(rte->attrs->eattrs, EA_GEN_IGP_METRIC);
   if (a)
-    buf += bsprintf(buf, " (%d/%u)", rte->pref, a->u.data);
+    buf += bsprintf(buf, " (%d/%u)", rte->attrs->pref, a->u.data);
   else
-    buf += bsprintf(buf, " (%d)", rte->pref);
+    buf += bsprintf(buf, " (%d)", rte->attrs->pref);
 }
 
 static void
diff --git a/sysdep/linux/netlink.c b/sysdep/linux/netlink.c
index 29b744cb..d8ac2e82 100644
--- a/sysdep/linux/netlink.c
+++ b/sysdep/linux/netlink.c
@@ -1580,7 +1580,7 @@ nl_mergable_route(struct nl_parse_state *s, net *net, struct krt_proto *p, uint
 static void
 nl_announce_route(struct nl_parse_state *s)
 {
-  rte *e = rte_get_temp(s->attrs);
+  rte *e = rte_get_temp(s->attrs, s->proto->p.main_source);
   e->net = s->net;
   e->u.krt.src = s->krt_src;
   e->u.krt.proto = s->krt_proto;
@@ -1755,7 +1755,6 @@ nl_parse_route(struct nl_parse_state *s, struct nlmsghdr *h)
     nl_announce_route(s);
 
   rta *ra = lp_allocz(s->pool, RTA_MAX_SIZE);
-  ra->src = p->p.main_source;
   ra->source = RTS_INHERIT;
   ra->scope = SCOPE_UNIVERSE;
 
diff --git a/sysdep/unix/krt.c b/sysdep/unix/krt.c
index da61fc9c..c03fa047 100644
--- a/sysdep/unix/krt.c
+++ b/sysdep/unix/krt.c
@@ -300,7 +300,7 @@ krt_learn_announce_update(struct krt_proto *p, rte *e)
 {
   net *n = e->net;
   rta *aa = rta_clone(e->attrs);
-  rte *ee = rte_get_temp(aa);
+  rte *ee = rte_get_temp(aa, p->p.main_source);
   ee->pflags = EA_ID_FLAG(EA_KRT_SOURCE) | EA_ID_FLAG(EA_KRT_METRIC);
   ee->u.krt = e->u.krt;
   rte_update(&p->p, n->n.addr, ee);
@@ -433,6 +433,9 @@ krt_learn_async(struct krt_proto *p, rte *e, int new)
   net *n = net_get(p->krt_table, n0->n.addr);
   rte *g, **gg, *best, **bestp, *old_best;
 
+  ASSERT(!e->attrs->cached);
+  e->attrs->pref = p->p.main_channel->preference;
+
   e->attrs = rta_lookup(e->attrs);
 
   old_best = n->routes;
@@ -906,7 +909,7 @@ static int
 krt_preexport(struct proto *P, rte *e)
 {
   // struct krt_proto *p = (struct krt_proto *) P;
-  if (e->attrs->src->proto == P)
+  if (e->src->proto == P)
     return -1;
 
   if (!krt_capable(e))