diff --git a/PVE/CLI/pve5to6.pm b/PVE/CLI/pve5to6.pm
index 5ce27b02..8e5c8538 100644
--- a/PVE/CLI/pve5to6.pm
+++ b/PVE/CLI/pve5to6.pm
@@ -440,6 +440,17 @@ sub check_ceph {
 	} else {
 	    log_pass("Found mon_host entry.");
 	}
+
+	if (my $ipv6 = ($global->{ms_bind_ipv6} // $global->{"ms bind ipv6"})) {
+	    my $ipv4 = $global->{ms_bind_ipv4} // $global->{"ms bind ipv4"};
+	    if ($ipv6 eq 'true' && (!defined($ipv4) || $ipv4 ne 'false')) {
+		log_warn("ms_bind_ipv6 is enabled but ms_bind_ipv4 is not disabled.\n  Make sure to disable ms_bind_ipv4 for ipv6 only clusters, or add an ipv4 network to public/cluster network.");
+	    } else {
+		log_pass("ms_bind_ipv6 is enabled and ms_bind_ipv4 disabled");
+	    }
+	} else {
+	    log_pass("ms_bind_ipv6 not enabled");
+	}
     } else {
 	log_skip("no ceph config found");
     }