Yealink SIP-T48G Administrator's Manual page 187

Configuring Advanced Features
Parameters Permitted Values Default
Example:
network.ipv6_primary_dns = 3036:1:1:c3c7: c11c:5447:23a6:256
Note: It works only if the value of the parameter "network.ip_address_mode" is set
to 1 (IPv6) or 2 (IPv4 & IPv6). In DHCP environment, you also need to make sure the
value of the parameter "network.ipv6_static_dns_enable" is set to 1 (On). If you
change this parameter, the IP phone will reboot to make the change take effect.
Web User Interface:
Network->Basic->IPv6 Config->Static IP Address->Primary DNS
Phone User Interface:
Menu->Settings->Advanced Settings (default password: admin)
->Network->WAN Port->IPv6->Static IPv6 Client->IPv6 Pri.DNS
Or Menu->Settings->Advanced Settings (default password: admin)
->Network->DNS Server->Static DNS(Enable)->Pri DNS
network.ipv6_secondary_dns IPv6 address Blank
Description:
Configures the secondary IPv6 DNS server.
Example:
network.ipv6_secondary_dns = 2026:1234:1:1:c3c7:c11c:5447:23a6
Note: It works only if the value of the parameter "network.ip_address_mode" is set
to 1 (IPv6) or 2 (IPv4 & IPv6). In DHCP environment, you also need to make sure the
value of the parameter "network.ipv6_static_dns_enable" is set to 1 (On). If you
change this parameter, the IP phone will reboot to make the change take effect.
Web User Interface:
Network->Basic->IPv6 Config->Static IP Address->Secondary DNS
Phone User Interface:
Menu->Settings->Advanced Settings (default password: admin)
->Network->WAN Port->IPv6->Static IPv6 Client->IPv6 Sec.DNS
Or Menu->Settings->Advanced Settings (default password: admin)
->Network->DNS Server->Static DNS(Enable)->Sec DNS
network.ipv6_icmp_v6.enable 0 or 1 1
Description:
Enables or disables the IP phone to obtain IPv6 network settings via SLAAC
(Stateless Address Autoconfiguration) method.
0-Disabled
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