diff --git a/CHANGES b/CHANGES
index a4db48c89f..234be1e4bc 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,3 +1,8 @@
+4889.	[func]		Warn about the use of old root keys without the new
+			root key being present.  Warn about dlv.isc.org's
+			key being present. Warn about both managed and
+			trusted root keys being present. [RT #43670]
+
 4888.	[test]		Initialize sockets correctly in sample-update so
 			that the nsupdate system test will run on Windows.
 			[RT #47097]
diff --git a/bin/named/server.c b/bin/named/server.c
index 04cbb0f947..68aca3559f 100644
--- a/bin/named/server.c
+++ b/bin/named/server.c
@@ -7820,8 +7820,8 @@ load_configuration(const char *filename, named_server_t *server,
 	if (access(server->bindkeysfile, R_OK) == 0) {
 		isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
 			      NAMED_LOGMODULE_SERVER, ISC_LOG_INFO,
-			      "reading built-in trusted "
-			      "keys from file '%s'", server->bindkeysfile);
+			      "reading built-in trust anchors "
+			      "from file '%s'", server->bindkeysfile);
 
 		CHECK(cfg_parser_create(named_g_mctx, named_g_lctx,
 					&bindkeys_parser));
@@ -7832,8 +7832,8 @@ load_configuration(const char *filename, named_server_t *server,
 	} else {
 		isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
 			      NAMED_LOGMODULE_SERVER, ISC_LOG_INFO,
-			      "unable to open '%s' using built-in keys",
-			      server->bindkeysfile);
+			      "unable to open '%s'; using built-in keys "
+			      "instead", server->bindkeysfile);
 	}
 
 	/* Ensure exclusive access to configuration data. */
diff --git a/bin/tests/system/checkconf/check-dlv-ksk-key.conf b/bin/tests/system/checkconf/check-dlv-ksk-key.conf
new file mode 100644
index 0000000000..1ee566d13f
--- /dev/null
+++ b/bin/tests/system/checkconf/check-dlv-ksk-key.conf
@@ -0,0 +1,9 @@
+trusted-keys {
+	dlv.isc.org 257 3 5 "BEAAAAPHMu/5onzrEE7z1egmhg/WPO0+juoZrW3euWE
+	        n4MxDCE1+lLy2brhQv5rN32RKtMzX6Mj70jdzeND4XknW58dnJNPCxn8
+		+jAGl2FZLK8t+1uq4W+nnA3qO2+DL+k6BD4mewMLbIYFwe0PG73Te9fZ
+		2kJb56dhgMde5ymX4BI/oQ+cAK50/xvJv00Frf8kw6ucMTwFlgPe+jnG
+		xPPEmHAte/URkY62ZfkLoBAADLHQ9IrS2tryAe7mbBZVcOwIeU/Rw/mR
+		x/vwwMCTgNboMQKtUdvNXDrYJDSHZws3xiRXF1Rf+al9UmZfSav/4NWL
+		KjHzpT59k/VStTDN0YUuWrBNh";
+};
diff --git a/bin/tests/system/checkconf/check-root-ksk-2010.conf b/bin/tests/system/checkconf/check-root-ksk-2010.conf
new file mode 100644
index 0000000000..54a1b9ff0b
--- /dev/null
+++ b/bin/tests/system/checkconf/check-root-ksk-2010.conf
@@ -0,0 +1,13 @@
+trusted-keys {
+        # This key (19036) is to be phased out starting in 2017. It will
+        # remain in the root zone for some time after its successor key
+        # has been added. It will remain this file until it is removed from
+        # the root zone.
+        . 257 3 8 "AwEAAagAIKlVZrpC6Ia7gEzahOR+9W29euxhJhVVLOyQbSEW0O8gcCjF
+                FVQUTf6v58fLjwBd0YI0EzrAcQqBGCzh/RStIoO8g0NfnfL2MTJRkxoX
+                bfDaUeVPQuYEhg37NZWAJQ9VnMVDxP/VHL496M/QZxkjf5/Efucp2gaD
+                X6RS6CXpoY68LsvPVjR0ZSwzz1apAzvN9dlzEheX7ICJBBtuA6G3LQpz
+                W5hOA2hzCTMjJPJ8LbqF6dsV6DoBQzgul0sGIcGOYl7OyQdXfZ57relS
+                Qageu+ipAdTTJ25AsRTAoub8ONGcLmqrAmRLKBP1dfwhYB4N7knNnulq
+                QxA+Uk1ihz0=";
+};
diff --git a/bin/tests/system/checkconf/check-root-ksk-2017.conf b/bin/tests/system/checkconf/check-root-ksk-2017.conf
new file mode 100644
index 0000000000..7d83d4b16c
--- /dev/null
+++ b/bin/tests/system/checkconf/check-root-ksk-2017.conf
@@ -0,0 +1,16 @@
+trusted-keys {
+        # This key (20326) was published in the root zone in 2017.
+        # Servers which were already using the old key (19036) should
+        # roll seamlessly to this new one via RFC 5011 rollover. Servers
+        # being set up for the first time can use the contents of this
+        # file as initializing keys; thereafter, the keys in the
+        # managed key database will be trusted and maintained
+        # automatically.
+        . 257 3 8 "AwEAAaz/tAm8yTn4Mfeh5eyI96WSVexTBAvkMgJzkKTOiW1vkIbzxeF3
+                +/4RgWOq7HrxRixHlFlExOLAJr5emLvN7SWXgnLh4+B5xQlNVz8Og8kv
+                ArMtNROxVQuCaSnIDdD5LKyWbRd2n9WGe2R8PzgCmr3EgVLrjyBxWezF
+                0jLHwVN8efS3rCj/EWgvIWgb9tarpVUDK/b58Da+sqqls3eNbuv7pr+e
+                oZG+SrDK6nWeL3c6H5Apxz7LjVc1uTIdsIXxuOLYA4/ilBmSVIzuDWfd
+                RUfhHdY6+cn8HFRm+2hM8AnXGXws9555KrUB5qihylGa8subX2Nn6UwN
+                R1AkUTV74bU=";
+};
diff --git a/bin/tests/system/checkconf/check-root-ksk-both.conf b/bin/tests/system/checkconf/check-root-ksk-both.conf
new file mode 100644
index 0000000000..091c9afbef
--- /dev/null
+++ b/bin/tests/system/checkconf/check-root-ksk-both.conf
@@ -0,0 +1,28 @@
+trusted-keys {
+        # This key (19036) is to be phased out starting in 2017. It will
+        # remain in the root zone for some time after its successor key
+        # has been added. It will remain this file until it is removed from
+        # the root zone.
+        . 257 3 8 "AwEAAagAIKlVZrpC6Ia7gEzahOR+9W29euxhJhVVLOyQbSEW0O8gcCjF
+                FVQUTf6v58fLjwBd0YI0EzrAcQqBGCzh/RStIoO8g0NfnfL2MTJRkxoX
+                bfDaUeVPQuYEhg37NZWAJQ9VnMVDxP/VHL496M/QZxkjf5/Efucp2gaD
+                X6RS6CXpoY68LsvPVjR0ZSwzz1apAzvN9dlzEheX7ICJBBtuA6G3LQpz
+                W5hOA2hzCTMjJPJ8LbqF6dsV6DoBQzgul0sGIcGOYl7OyQdXfZ57relS
+                Qageu+ipAdTTJ25AsRTAoub8ONGcLmqrAmRLKBP1dfwhYB4N7knNnulq
+                QxA+Uk1ihz0=";
+
+        # This key (20326) was published in the root zone in 2017.
+        # Servers which were already using the old key (19036) should
+        # roll seamlessly to this new one via RFC 5011 rollover. Servers
+        # being set up for the first time can use the contents of this
+        # file as initializing keys; thereafter, the keys in the
+        # managed key database will be trusted and maintained
+        # automatically.
+        . 257 3 8 "AwEAAaz/tAm8yTn4Mfeh5eyI96WSVexTBAvkMgJzkKTOiW1vkIbzxeF3
+                +/4RgWOq7HrxRixHlFlExOLAJr5emLvN7SWXgnLh4+B5xQlNVz8Og8kv
+                ArMtNROxVQuCaSnIDdD5LKyWbRd2n9WGe2R8PzgCmr3EgVLrjyBxWezF
+                0jLHwVN8efS3rCj/EWgvIWgb9tarpVUDK/b58Da+sqqls3eNbuv7pr+e
+                oZG+SrDK6nWeL3c6H5Apxz7LjVc1uTIdsIXxuOLYA4/ilBmSVIzuDWfd
+                RUfhHdY6+cn8HFRm+2hM8AnXGXws9555KrUB5qihylGa8subX2Nn6UwN
+                R1AkUTV74bU=";
+};
diff --git a/bin/tests/system/checkconf/tests.sh b/bin/tests/system/checkconf/tests.sh
index 245481c8ea..4f252a4668 100644
--- a/bin/tests/system/checkconf/tests.sh
+++ b/bin/tests/system/checkconf/tests.sh
@@ -362,5 +362,34 @@ $CHECKCONF good-dlv-dlv.example.com.conf > checkconf.out$n 2>/dev/null || ret=1
 if [ $ret != 0 ]; then echo "I:failed"; ret=1; fi
 status=`expr $status + $ret`
 
+n=`expr $n + 1`
+echo "I: check that the 2010 ICANN ROOT KSK without the 2017 ICANN ROOT KSK generates a warning ($n)"
+ret=0
+$CHECKCONF check-root-ksk-2010.conf > checkconf.out$n 2>/dev/null || ret=1
+[ -s checkconf.out$n ] || ret=1
+if [ $ret != 0 ]; then echo "I:failed"; ret=1; fi
+status=`expr $status + $ret`
+
+echo "I: check that the 2010 ICANN ROOT KSK with the 2017 ICANN ROOT KSK does not warning ($n)"
+ret=0
+$CHECKCONF check-root-ksk-both.conf > checkconf.out$n 2>/dev/null || ret=1
+[ -s checkconf.out$n ] && ret=1
+if [ $ret != 0 ]; then echo "I:failed"; ret=1; fi
+status=`expr $status + $ret`
+
+echo "I: check that the 2017 ICANN ROOT KSK alone does not warning ($n)"
+ret=0
+$CHECKCONF check-root-ksk-2017.conf > checkconf.out$n 2>/dev/null || ret=1
+[ -s checkconf.out$n ] && ret=1
+if [ $ret != 0 ]; then echo "I:failed"; ret=1; fi
+status=`expr $status + $ret`
+
+echo "I: check that the dlv.isc.org KSK generates a warning ($n)"
+ret=0
+$CHECKCONF good-dlv-dlv.example.com.conf > checkconf.out$n 2>/dev/null || ret=1
+[ -s checkconf.out$n ] || ret=1
+if [ $ret != 0 ]; then echo "I:failed"; ret=1; fi
+status=`expr $status + $ret`
+
 echo "I:exit status: $status"
 [ $status -eq 0 ] || exit 1
diff --git a/lib/bind9/check.c b/lib/bind9/check.c
index d7e410060e..b91c418a31 100644
--- a/lib/bind9/check.c
+++ b/lib/bind9/check.c
@@ -2908,9 +2908,13 @@ check_servers(const cfg_obj_t *config, const cfg_obj_t *voptions,
 	return (result);
 }
 
+#define ROOT_KSK_2010	0x1
+#define ROOT_KSK_2017	0x2
+#define DLV_KSK_KEY	0x4
+
 static isc_result_t
 check_trusted_key(const cfg_obj_t *key, isc_boolean_t managed,
-		  isc_log_t *logctx)
+		  unsigned int *keyflags, isc_log_t *logctx)
 {
 	const char *keystr, *keynamestr;
 	dns_fixedname_t fkeyname;
@@ -2988,6 +2992,128 @@ check_trusted_key(const cfg_obj_t *key, isc_boolean_t managed,
 				    keynamestr);
 	}
 
+	if (result == ISC_R_SUCCESS && dns_name_equal(keyname, dns_rootname)) {
+		static const unsigned char root_ksk_2010[] = {
+			0x03, 0x01, 0x00, 0x01, 0xa8, 0x00, 0x20, 0xa9,
+			0x55, 0x66, 0xba, 0x42, 0xe8, 0x86, 0xbb, 0x80,
+			0x4c, 0xda, 0x84, 0xe4, 0x7e, 0xf5, 0x6d, 0xbd,
+			0x7a, 0xec, 0x61, 0x26, 0x15, 0x55, 0x2c, 0xec,
+			0x90, 0x6d, 0x21, 0x16, 0xd0, 0xef, 0x20, 0x70,
+			0x28, 0xc5, 0x15, 0x54, 0x14, 0x4d, 0xfe, 0xaf,
+			0xe7, 0xc7, 0xcb, 0x8f, 0x00, 0x5d, 0xd1, 0x82,
+			0x34, 0x13, 0x3a, 0xc0, 0x71, 0x0a, 0x81, 0x18,
+			0x2c, 0xe1, 0xfd, 0x14, 0xad, 0x22, 0x83, 0xbc,
+			0x83, 0x43, 0x5f, 0x9d, 0xf2, 0xf6, 0x31, 0x32,
+			0x51, 0x93, 0x1a, 0x17, 0x6d, 0xf0, 0xda, 0x51,
+			0xe5, 0x4f, 0x42, 0xe6, 0x04, 0x86, 0x0d, 0xfb,
+			0x35, 0x95, 0x80, 0x25, 0x0f, 0x55, 0x9c, 0xc5,
+			0x43, 0xc4, 0xff, 0xd5, 0x1c, 0xbe, 0x3d, 0xe8,
+			0xcf, 0xd0, 0x67, 0x19, 0x23, 0x7f, 0x9f, 0xc4,
+			0x7e, 0xe7, 0x29, 0xda, 0x06, 0x83, 0x5f, 0xa4,
+			0x52, 0xe8, 0x25, 0xe9, 0xa1, 0x8e, 0xbc, 0x2e,
+			0xcb, 0xcf, 0x56, 0x34, 0x74, 0x65, 0x2c, 0x33,
+			0xcf, 0x56, 0xa9, 0x03, 0x3b, 0xcd, 0xf5, 0xd9,
+			0x73, 0x12, 0x17, 0x97, 0xec, 0x80, 0x89, 0x04,
+			0x1b, 0x6e, 0x03, 0xa1, 0xb7, 0x2d, 0x0a, 0x73,
+			0x5b, 0x98, 0x4e, 0x03, 0x68, 0x73, 0x09, 0x33,
+			0x23, 0x24, 0xf2, 0x7c, 0x2d, 0xba, 0x85, 0xe9,
+			0xdb, 0x15, 0xe8, 0x3a, 0x01, 0x43, 0x38, 0x2e,
+			0x97, 0x4b, 0x06, 0x21, 0xc1, 0x8e, 0x62, 0x5e,
+			0xce, 0xc9, 0x07, 0x57, 0x7d, 0x9e, 0x7b, 0xad,
+			0xe9, 0x52, 0x41, 0xa8, 0x1e, 0xbb, 0xe8, 0xa9,
+			0x01, 0xd4, 0xd3, 0x27, 0x6e, 0x40, 0xb1, 0x14,
+			0xc0, 0xa2, 0xe6, 0xfc, 0x38, 0xd1, 0x9c, 0x2e,
+			0x6a, 0xab, 0x02, 0x64, 0x4b, 0x28, 0x13, 0xf5,
+			0x75, 0xfc, 0x21, 0x60, 0x1e, 0x0d, 0xee, 0x49,
+			0xcd, 0x9e, 0xe9, 0x6a, 0x43, 0x10, 0x3e, 0x52,
+			0x4d, 0x62, 0x87, 0x3d };
+		static const unsigned char root_ksk_2017[] = {
+			0x03, 0x01, 0x00, 0x01, 0xac, 0xff, 0xb4, 0x09,
+			0xbc, 0xc9, 0x39, 0xf8, 0x31, 0xf7, 0xa1, 0xe5,
+			0xec, 0x88, 0xf7, 0xa5, 0x92, 0x55, 0xec, 0x53,
+			0x04, 0x0b, 0xe4, 0x32, 0x02, 0x73, 0x90, 0xa4,
+			0xce, 0x89, 0x6d, 0x6f, 0x90, 0x86, 0xf3, 0xc5,
+			0xe1, 0x77, 0xfb, 0xfe, 0x11, 0x81, 0x63, 0xaa,
+			0xec, 0x7a, 0xf1, 0x46, 0x2c, 0x47, 0x94, 0x59,
+			0x44, 0xc4, 0xe2, 0xc0, 0x26, 0xbe, 0x5e, 0x98,
+			0xbb, 0xcd, 0xed, 0x25, 0x97, 0x82, 0x72, 0xe1,
+			0xe3, 0xe0, 0x79, 0xc5, 0x09, 0x4d, 0x57, 0x3f,
+			0x0e, 0x83, 0xc9, 0x2f, 0x02, 0xb3, 0x2d, 0x35,
+			0x13, 0xb1, 0x55, 0x0b, 0x82, 0x69, 0x29, 0xc8,
+			0x0d, 0xd0, 0xf9, 0x2c, 0xac, 0x96, 0x6d, 0x17,
+			0x76, 0x9f, 0xd5, 0x86, 0x7b, 0x64, 0x7c, 0x3f,
+			0x38, 0x02, 0x9a, 0xbd, 0xc4, 0x81, 0x52, 0xeb,
+			0x8f, 0x20, 0x71, 0x59, 0xec, 0xc5, 0xd2, 0x32,
+			0xc7, 0xc1, 0x53, 0x7c, 0x79, 0xf4, 0xb7, 0xac,
+			0x28, 0xff, 0x11, 0x68, 0x2f, 0x21, 0x68, 0x1b,
+			0xf6, 0xd6, 0xab, 0xa5, 0x55, 0x03, 0x2b, 0xf6,
+			0xf9, 0xf0, 0x36, 0xbe, 0xb2, 0xaa, 0xa5, 0xb3,
+			0x77, 0x8d, 0x6e, 0xeb, 0xfb, 0xa6, 0xbf, 0x9e,
+			0xa1, 0x91, 0xbe, 0x4a, 0xb0, 0xca, 0xea, 0x75,
+			0x9e, 0x2f, 0x77, 0x3a, 0x1f, 0x90, 0x29, 0xc7,
+			0x3e, 0xcb, 0x8d, 0x57, 0x35, 0xb9, 0x32, 0x1d,
+			0xb0, 0x85, 0xf1, 0xb8, 0xe2, 0xd8, 0x03, 0x8f,
+			0xe2, 0x94, 0x19, 0x92, 0x54, 0x8c, 0xee, 0x0d,
+			0x67, 0xdd, 0x45, 0x47, 0xe1, 0x1d, 0xd6, 0x3a,
+			0xf9, 0xc9, 0xfc, 0x1c, 0x54, 0x66, 0xfb, 0x68,
+			0x4c, 0xf0, 0x09, 0xd7, 0x19, 0x7c, 0x2c, 0xf7,
+			0x9e, 0x79, 0x2a, 0xb5, 0x01, 0xe6, 0xa8, 0xa1,
+			0xca, 0x51, 0x9a, 0xf2, 0xcb, 0x9b, 0x5f, 0x63,
+			0x67, 0xe9, 0x4c, 0x0d, 0x47, 0x50, 0x24, 0x51,
+			0x35, 0x7b, 0xe1, 0xb5 };
+		if (flags == 257 && proto == 3 && alg == 8 &&
+		    isc_buffer_usedlength(&b) == sizeof(root_ksk_2010) &&
+		    !memcmp(keydata, root_ksk_2010, sizeof(root_ksk_2010))) {
+			*keyflags |= ROOT_KSK_2010;
+		}
+		if (flags == 257 && proto == 3 && alg == 8 &&
+		    isc_buffer_usedlength(&b) == sizeof(root_ksk_2017) &&
+		    !memcmp(keydata, root_ksk_2017, sizeof(root_ksk_2017))) {
+			*keyflags |= ROOT_KSK_2017;
+		}
+	}
+	if (result == ISC_R_SUCCESS && dns_name_equal(keyname, &dlviscorg)) {
+		static const unsigned char dlviscorgkey[] = {
+			0x04, 0x40, 0x00, 0x00, 0x03, 0xc7, 0x32, 0xef,
+			0xf9, 0xa2, 0x7c, 0xeb, 0x10, 0x4e, 0xf3, 0xd5,
+			0xe8, 0x26, 0x86, 0x0f, 0xd6, 0x3c, 0xed, 0x3e,
+			0x8e, 0xea, 0x19, 0xad, 0x6d, 0xde, 0xb9, 0x61,
+			0x27, 0xe0, 0xcc, 0x43, 0x08, 0x4d, 0x7e, 0x94,
+			0xbc, 0xb6, 0x6e, 0xb8, 0x50, 0xbf, 0x9a, 0xcd,
+			0xdf, 0x64, 0x4a, 0xb4, 0xcc, 0xd7, 0xe8, 0xc8,
+			0xfb, 0xd2, 0x37, 0x73, 0x78, 0xd0, 0xf8, 0x5e,
+			0x49, 0xd6, 0xe7, 0xc7, 0x67, 0x24, 0xd3, 0xc2,
+			0xc6, 0x7f, 0x3e, 0x8c, 0x01, 0xa5, 0xd8, 0x56,
+			0x4b, 0x2b, 0xcb, 0x7e, 0xd6, 0xea, 0xb8, 0x5b,
+			0xe9, 0xe7, 0x03, 0x7a, 0x8e, 0xdb, 0xe0, 0xcb,
+			0xfa, 0x4e, 0x81, 0x0f, 0x89, 0x9e, 0xc0, 0xc2,
+			0xdb, 0x21, 0x81, 0x70, 0x7b, 0x43, 0xc6, 0xef,
+			0x74, 0xde, 0xf5, 0xf6, 0x76, 0x90, 0x96, 0xf9,
+			0xe9, 0xd8, 0x60, 0x31, 0xd7, 0xb9, 0xca, 0x65,
+			0xf8, 0x04, 0x8f, 0xe8, 0x43, 0xe7, 0x00, 0x2b,
+			0x9d, 0x3f, 0xc6, 0xf2, 0x6f, 0xd3, 0x41, 0x6b,
+			0x7f, 0xc9, 0x30, 0xea, 0xe7, 0x0c, 0x4f, 0x01,
+			0x65, 0x80, 0xf7, 0xbe, 0x8e, 0x71, 0xb1, 0x3c,
+			0xf1, 0x26, 0x1c, 0x0b, 0x5e, 0xfd, 0x44, 0x64,
+			0x63, 0xad, 0x99, 0x7e, 0x42, 0xe8, 0x04, 0x00,
+			0x03, 0x2c, 0x74, 0x3d, 0x22, 0xb4, 0xb6, 0xb6,
+			0xbc, 0x80, 0x7b, 0xb9, 0x9b, 0x05, 0x95, 0x5c,
+			0x3b, 0x02, 0x1e, 0x53, 0xf4, 0x70, 0xfe, 0x64,
+			0x71, 0xfe, 0xfc, 0x30, 0x30, 0x24, 0xe0, 0x35,
+			0xba, 0x0c, 0x40, 0xab, 0x54, 0x76, 0xf3, 0x57,
+			0x0e, 0xb6, 0x09, 0x0d, 0x21, 0xd9, 0xc2, 0xcd,
+			0xf1, 0x89, 0x15, 0xc5, 0xd5, 0x17, 0xfe, 0x6a,
+			0x5f, 0x54, 0x99, 0x97, 0xd2, 0x6a, 0xff, 0xf8,
+			0x35, 0x62, 0xca, 0x8c, 0x7c, 0xe9, 0x4f, 0x9f,
+			0x64, 0xfd, 0x54, 0xad, 0x4c, 0x33, 0x74, 0x61,
+			0x4b, 0x96, 0xac, 0x13, 0x61 };
+		if (flags == 257 && proto == 3 && alg == 5 &&
+		    isc_buffer_usedlength(&b) == sizeof(dlviscorgkey) &&
+		    !memcmp(keydata, dlviscorgkey, sizeof(dlviscorgkey))) {
+			*keyflags |= DLV_KSK_KEY;
+		}
+	}
+
 	return (result);
 }
 
@@ -3077,6 +3203,7 @@ check_viewconf(const cfg_obj_t *config, const cfg_obj_t *voptions,
 	const cfg_obj_t *opts = NULL;
 	isc_boolean_t enablednssec, enablevalidation;
 	const char *valstr = "no";
+	unsigned int tflags, mflags;
 
 	/*
 	 * Get global options block
@@ -3260,6 +3387,7 @@ check_viewconf(const cfg_obj_t *config, const cfg_obj_t *voptions,
 	if (keys == NULL)
 		(void)cfg_map_get(config, "trusted-keys", &keys);
 
+	tflags = 0;
 	for (element = cfg_list_first(keys);
 	     element != NULL;
 	     element = cfg_list_next(element))
@@ -3269,18 +3397,32 @@ check_viewconf(const cfg_obj_t *config, const cfg_obj_t *voptions,
 		     element2 != NULL;
 		     element2 = cfg_list_next(element2)) {
 			obj = cfg_listelt_value(element2);
-			tresult = check_trusted_key(obj, ISC_FALSE, logctx);
+			tresult = check_trusted_key(obj, ISC_FALSE, &tflags,
+						    logctx);
 			if (tresult != ISC_R_SUCCESS)
 				result = tresult;
 		}
 	}
 
+	if ((tflags & ROOT_KSK_2010) != 0 && (tflags & ROOT_KSK_2017) == 0) {
+		cfg_obj_log(keys, logctx, ISC_LOG_WARNING,
+			    "trusted-key for root from 2010 without updated "
+			    "trusted-key from 2017");
+	}
+
+	if ((tflags & DLV_KSK_KEY) != 0) {
+		cfg_obj_log(keys, logctx, ISC_LOG_WARNING,
+			    "trusted-key for dlv.isc.org still present; "
+			    "dlv.isc.org has been shut down");
+	}
+
 	keys = NULL;
 	if (voptions != NULL)
 		(void)cfg_map_get(voptions, "managed-keys", &keys);
 	if (keys == NULL)
 		(void)cfg_map_get(config, "managed-keys", &keys);
 
+	mflags = 0;
 	for (element = cfg_list_first(keys);
 	     element != NULL;
 	     element = cfg_list_next(element))
@@ -3290,12 +3432,33 @@ check_viewconf(const cfg_obj_t *config, const cfg_obj_t *voptions,
 		     element2 != NULL;
 		     element2 = cfg_list_next(element2)) {
 			obj = cfg_listelt_value(element2);
-			tresult = check_trusted_key(obj, ISC_TRUE, logctx);
+			tresult = check_trusted_key(obj, ISC_TRUE, &mflags,
+						    logctx);
 			if (tresult != ISC_R_SUCCESS)
 				result = tresult;
 		}
 	}
 
+	if ((mflags & ROOT_KSK_2010) != 0 && (mflags & ROOT_KSK_2017) == 0) {
+		cfg_obj_log(keys, logctx, ISC_LOG_WARNING,
+			    "managed-key for root from 2010 without updated "
+			    "managed-key from 2017");
+	}
+
+	if ((mflags & DLV_KSK_KEY) != 0) {
+		cfg_obj_log(keys, logctx, ISC_LOG_WARNING,
+			    "managed-key for dlv.isc.org still present; "
+			    "dlv.isc.org has been shut down");
+	}
+
+	if ((tflags & (ROOT_KSK_2010|ROOT_KSK_2017)) != 0 &&
+	    (mflags & (ROOT_KSK_2010|ROOT_KSK_2017)) != 0)
+	{
+		cfg_obj_log(keys, logctx, ISC_LOG_WARNING,
+			    "both trusted-keys and managed-keys for the ICANN "
+			    "root are present");
+	}
+
 	/*
 	 * Check options.
 	 */