From 4c1b4e1a582ea8d13943c46ad87588d5743439cb Mon Sep 17 00:00:00 2001
From: Martin Mares <mj@ucw.cz>
Date: Wed, 1 Mar 2000 11:48:11 +0000
Subject: [PATCH] If the user has specified identical preferences for instances
 of different protocols, break the tie by comparing addresses, so we keep the
 ordering unambiguous.

---
 nest/rt-table.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/nest/rt-table.c b/nest/rt-table.c
index dcde0af8..4c406cf7 100644
--- a/nest/rt-table.c
+++ b/nest/rt-table.c
@@ -95,7 +95,14 @@ rte_better(rte *new, rte *old)
   if (new->pref < old->pref)
     return 0;
   if (new->attrs->proto->proto != old->attrs->proto->proto)
-    bug("Different protocols, but identical preferences => oops");	/* FIXME */
+    {
+      /*
+       *  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->proto->proto > old->attrs->proto->proto;
+    }
   if (better = new->attrs->proto->rte_better)
     return better(new, old);
   return 0;