Administrator’s Guide for W60P DECT IP Phones40To configure DHCP VLAN discovery via web user interface:1. Click on Network->Advanced.2. In the DHCP VLAN block, select the desired value from the pull-down list of Active.3. Enter the desired option in the Option (1-255) field.4. Click Confirm to accept the change.A dialog box pops up to prompt that the settings will take effect after a reboot.5. Click OK to reboot the phone.To configure DHCP VLAN discovery via handset user interface:1. Press OK to enter the main menu.2. Select Settings->System Settings->Network (default PIN: 0000) ->VLAN->VLANDHCP.3. Press or to select Enabled from the Status field.4. Enter the valid value in the Options field.5. Press the Save soft key to accept the change.The DECT IP phone reboots automatically to make settings effective after a period of time.IPv6 SupportBecause Internet Protocol version 4 (IPv4) uses a 32-bit address, it cannot meet the increaseddemands for unique IP addresses for all devices that connect to the Internet. Therefore, InternetProtocol version 6 (IPv6) is the next generation network layer protocol, which designed as areplacement for the current IPv4 protocol.IPv6 is developed by the Internet Engineering Task Force (IETF) to deal with the long-anticipated problem of IPv4 address exhaustion. Yealink DECT IP phone supports IPv4addressing mode, IPv6 addressing mode, as well as an IPv4&IPv6 dual stack addressing mode.IPv4 uses a 32-bit address, consisting of four groups of three decimal digits separated by dots;for example, 192.168.1.100. IPv6 uses a 128-bit address, consisting of eight groups of fourhexadecimal digits separated by colons; for example, 2026:1234:1:1:215:65ff:fe1f:caa.VoIP network based on IPv6 can provide end-to-end security capabilities, enhanced Quality ofService (QoS), a set of service requirements to deliver performance guarantee while