diff --git a/conf/cf-lex.l b/conf/cf-lex.l
index 3848718d..15b65f67 100644
--- a/conf/cf-lex.l
+++ b/conf/cf-lex.l
@@ -125,7 +125,12 @@ include   ^{WHITE}*include{WHITE}*\".*\"{WHITE}*;
 [02]:{DIGIT}+:{DIGIT}+ {
   char *e;
   unsigned long int l;
-  cf_lval.i64 = ((u64)(yytext[0] - '0')) << 48;
+
+  if (yytext[0] == '0')
+    cf_lval.i64 = 0;
+  else
+    cf_lval.i64 = 0x2000000000000ULL;
+
   errno = 0;
   l = strtoul(yytext+2, &e, 10);
   if (e && (*e != ':') || errno == ERANGE || (yytext[0] == '0') && (l >= (1<<16)))
diff --git a/lib/net.c b/lib/net.c
index 85a2f1ad..dbeb545f 100644
--- a/lib/net.c
+++ b/lib/net.c
@@ -43,6 +43,7 @@ int
 net_format(const net_addr *N, char *buf, int buflen)
 {
   net_addr_union *n = (void *) N;
+  buf[0] = 0;
 
   switch (n->n.type)
   {
@@ -57,24 +58,24 @@ net_format(const net_addr *N, char *buf, int buflen)
       case 1: return bsnprintf(buf, buflen, "1:%I4:%u %I4/%d", ip4_from_u32(n->vpn4.rd >> 16), (u32) (n->vpn4.rd & 0xffff), n->vpn4.prefix, n->vpn4.pxlen);
       case 2: return bsnprintf(buf, buflen, "2:%u:%u %I4/%d", (u32) (n->vpn4.rd >> 16), (u32) (n->vpn4.rd & 0xffff), n->vpn4.prefix, n->vpn4.pxlen);
     }
-    return 0;
+    return bsnprintf(buf, buflen, "X: %016x %I4/%d", (n->vpn4.rd), n->vpn4.prefix, n->vpn4.pxlen);
 
     /* XXX: RD format is specified for VPN4; not found any for VPN6, reusing the same as for VPN4. */
   case NET_VPN6:
-    switch (n->vpn4.rd >> 48)
+    switch (n->vpn6.rd >> 48)
     {
       case 0: return bsnprintf(buf, buflen, "0:%u:%u %I6/%d", (u32) (n->vpn6.rd >> 32), (u32) n->vpn6.rd, n->vpn6.prefix, n->vpn6.pxlen);
       case 1: return bsnprintf(buf, buflen, "1:%I4:%u %I6/%d", ip4_from_u32(n->vpn6.rd >> 16), (u32) (n->vpn6.rd & 0xffff), n->vpn6.prefix, n->vpn6.pxlen);
       case 2: return bsnprintf(buf, buflen, "2:%u:%u %I6/%d", (u32) (n->vpn6.rd >> 16), (u32) (n->vpn6.rd & 0xffff), n->vpn6.prefix, n->vpn6.pxlen);
     }
-    return 0;
+    return bsnprintf(buf, buflen, "X: %016x %I6/%d", (n->vpn6.rd), n->vpn6.prefix, n->vpn6.pxlen);
   case NET_ROA4:
     return bsnprintf(buf, buflen, "%I4/%u-%u AS%u",  n->roa4.prefix, n->roa4.pxlen, n->roa4.max_pxlen, n->roa4.asn);
   case NET_ROA6:
     return bsnprintf(buf, buflen, "%I6/%u-%u AS%u",  n->roa6.prefix, n->roa6.pxlen, n->roa6.max_pxlen, n->roa6.asn);
   }
 
-  return 0;
+  bug("unknown network type");
 }
 
 ip_addr