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diff --git a/src/lib/dhcpsrv/parsers/base_network_parser.h b/src/lib/dhcpsrv/parsers/base_network_parser.h
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+++ b/src/lib/dhcpsrv/parsers/base_network_parser.h
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+// Copyright (C) 2019-2022 Internet Systems Consortium, Inc. ("ISC")
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+#ifndef BASE_NETWORK_PARSER_H
+#define BASE_NETWORK_PARSER_H
+
+#include <cc/data.h>
+#include <cc/simple_parser.h>
+#include <dhcpsrv/cfg_globals.h>
+#include <dhcpsrv/network.h>
+
+namespace isc {
+namespace dhcp {
+
+/// @brief Common configuration parser for shared networks
+/// and subnets.
+class BaseNetworkParser : public data::SimpleParser {
+public:
+
+    /// @brief Moves deprecated reservation-mode parameter to
+    /// new reservations flags.
+    ///
+    /// @param config [in/out] configuration to alter.
+    /// @throw DhcpConfigError on error e.g. when both reservation-mode
+    /// and a flag are specified.
+    static void moveReservationMode(isc::data::ElementPtr config);
+
+    /// @brief Moves deprecated reservation-mode parameter to
+    /// new reservations flags.
+    ///
+    /// @param config [in/out] global parameters to alter.
+    /// @throw DhcpConfigError on error e.g. when both reservation-mode
+    /// and a flag are specified.
+    static void moveReservationMode(CfgGlobalsPtr config);
+
+protected:
+
+    /// @brief Parses common parameters
+    ///
+    /// The parsed parameters are:
+    /// - renew-timer,
+    /// - rebind-timer,
+    /// - valid-lifetime,
+    /// - store-extended-info
+    /// - reservations-global
+    /// - reservations-in-subnet
+    /// - reservations-out-of-pool
+    ///
+    /// @param network_data Data element holding shared network
+    /// configuration to be parsed.
+    /// @param [out] network Pointer to a network in which parsed data is
+    /// to be stored.
+    void parseCommon(const data::ConstElementPtr& network_data,
+                     NetworkPtr& network);
+
+    /// @brief Parses parameters related to "percent" timers settings.
+    ///
+    /// The parsed parameters are:
+    /// - calculate-tee-times,
+    /// - t1-percent,
+    /// - t2-percent.
+    ///
+    /// @param network_data Data element holding network configuration
+    /// to be parsed.
+    /// @param [out] network Pointer to a network in which parsed data is
+    /// to be stored.
+    ///
+    /// @throw DhcpConfigError if configuration of these parameters is
+    /// invalid.
+    void parseTeePercents(const data::ConstElementPtr& network_data,
+                          NetworkPtr& network);
+
+    /// @brief Parses parameters related to lease cache settings.
+    ///
+    /// The parsed parameters are:
+    /// - cache-threshold,
+    /// - cache-max-age.
+    ///
+    /// @param network_data Data element holding network configuration
+    /// to be parsed.
+    /// @param [out] network Pointer to a network in which parsed data is
+    /// to be stored.
+    ///
+    /// @throw DhcpConfigError if configuration of these parameters is
+    /// invalid.
+    void parseCacheParams(const data::ConstElementPtr& network_data,
+                     NetworkPtr& network);
+
+    /// @brief Parses parameters pertaining to DDNS behavior.
+    ///
+    /// The parsed parameters are:
+    /// - ddns-send-updates
+    /// - ddns-override-no-update
+    /// - ddns-override-client-update
+    /// - ddns-replace-client-name
+    /// - ddns-generated-prefix
+    /// - ddns-qualifying-suffix
+    ///
+    /// @param network_data Data element holding shared network
+    /// configuration to be parsed.
+    /// @param [out] network Pointer to a network in which parsed data is
+    /// to be stored.
+    void parseDdnsParams(const data::ConstElementPtr& network_data,
+                         NetworkPtr& network);
+};
+
+} // end of namespace isc::dhcp
+} // end of namespace isc
+
+#endif