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diff --git a/src/lib/dhcp/option6_addrlst.h b/src/lib/dhcp/option6_addrlst.h
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+++ b/src/lib/dhcp/option6_addrlst.h
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+// Copyright (C) 2011-2022 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 OPTION6_ADDRLST_H
+#define OPTION6_ADDRLST_H
+
+#include <asiolink/io_address.h>
+#include <dhcp/option.h>
+#include <boost/shared_ptr.hpp>
+#include <vector>
+
+namespace isc {
+namespace dhcp {
+
+/// @brief DHCPv6 Option class for handling list of IPv6 addresses.
+///
+/// This class handles a list of IPv6 addresses. An example of such option
+/// is dns-servers option. It can also be used to handle single address.
+class Option6AddrLst: public Option {
+
+public:
+    /// a container for (IPv6) addresses
+    typedef std::vector<isc::asiolink::IOAddress> AddressContainer;
+
+    /// @brief Constructor used during option generation.
+    ///
+    /// @param type option type
+    /// @param addrs vector of addresses to be stored
+    Option6AddrLst(uint16_t type, const AddressContainer& addrs);
+
+    /// @brief Simplified constructor for a single address
+    ///
+    /// @param type option type
+    /// @param addr a single address to be stored
+    Option6AddrLst(uint16_t type, const isc::asiolink::IOAddress& addr);
+
+    /// @brief Constructor used for parsing received option
+    ///
+    /// @param type option type
+    /// @param begin iterator to first byte of option data
+    /// @param end iterator to end of option data (first byte after option end)
+    Option6AddrLst(uint16_t type, OptionBufferConstIter begin,
+                   OptionBufferConstIter end);
+
+    virtual OptionPtr clone() const;
+
+    /// @brief Assembles on-wire form of this option
+    ///
+    /// @param buf pointer to packet buffer
+    /// @param check if set to false, allows options larger than 255 for v4
+    void pack(isc::util::OutputBuffer& buf, bool check = true) const;
+
+    /// @brief Parses received data
+    ///
+    /// @param begin iterator to first byte of option data
+    /// @param end iterator to end of option data (first byte after option end)
+    virtual void unpack(OptionBufferConstIter begin,
+                        OptionBufferConstIter end);
+
+    virtual std::string toText(int indent = 0) const;
+
+    /// @brief Sets a single address.
+    ///
+    /// @param addr a single address to be added
+    void setAddress(const isc::asiolink::IOAddress& addr);
+
+    /// @brief Sets list of addresses.
+    ///
+    /// @param addrs a vector of addresses to be added
+    void setAddresses(const AddressContainer& addrs);
+
+    /// @brief Returns vector with addresses.
+    ///
+    /// We return a copy of our list. Although this includes overhead,
+    /// it also makes this list safe to use after this option object
+    /// is no longer available. As options are expected to hold only
+    /// a few (1-3) addresses, the overhead is not that big.
+    ///
+    /// @return address container with addresses
+    AddressContainer getAddresses() const { return addrs_; };
+
+    // returns data length (data length + DHCPv4/DHCPv6 option header)
+    virtual uint16_t len() const;
+
+protected:
+    AddressContainer addrs_;
+};
+
+/// @brief Pointer to the @c Option6AddrLst object.
+typedef boost::shared_ptr<Option6AddrLst> Option6AddrLstPtr;
+
+} // isc::dhcp namespace
+} // isc namespace
+
+#endif // OPTION_ADDRLST_H