From 96a733b433c75973bb15dec835d8d9102c24316f Mon Sep 17 00:00:00 2001
From: Li Cao <irvingcl@google.com>
Date: Tue, 30 Sep 2025 09:13:22 +0800
Subject: [PATCH] [routing-manager] remove confusing log of nat64 prefix
 discovery (#11973)

Note that `otPlatInfraIfDiscoverNat64Prefix` has an empty
implementation now and it always returns UNIMPLEMENTED error. So now
we constantly see the warn log on devices, which is confusing.
---
 src/core/border_router/routing_manager.cpp | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/core/border_router/routing_manager.cpp b/src/core/border_router/routing_manager.cpp
index fd4111a3e..8d912ffa4 100644
--- a/src/core/border_router/routing_manager.cpp
+++ b/src/core/border_router/routing_manager.cpp
@@ -4318,7 +4318,10 @@ void RoutingManager::Nat64PrefixManager::Discover(void)
     }
     else
     {
-        LogWarn("Failed to discover infraif NAT64 prefix: %s", ErrorToString(error));
+        if (error != kErrorNotImplemented)
+        {
+            LogWarn("Failed to discover infraif NAT64 prefix: %s", ErrorToString(error));
+        }
         Get<RoutingManager>().ScheduleRoutingPolicyEvaluation(kAfterRandomDelay);
     }
 }