Есть DGL-4300 А2 V1.4

Для соединения с провайдером требуется L2TP клиент и dynamic IP.

В эмуляторе на вашем сйте все это есть. В роутере dynamic IP нет.

Эта проблема решаема?

Ок соединяюсь по L2TP к другому серверу. DGL-624+ работал отлично.
Этот прибор не хочет.

Что делать?

Лог

INFO] Sat Jan 31 10:37:42 2004 Log viewed by IP address 192.168.0.100
[INFO] Sat Jan 31 10:37:28 2004 L2TP local tunnel 0x0744 RTE module has shut down.
[INFO] Sat Jan 31 10:37:28 2004 L2TP local tunnel 0x0744 has been disconnected
[INFO] Sat Jan 31 10:37:28 2004 L2TP local tunnel 0x0744 RTE module is shutting down.
[INFO] Sat Jan 31 10:37:28 2004 Trying to connect to L2TP server
[INFO] Sat Jan 31 10:37:28 2004 WAN interface is down
[INFO] Sat Jan 31 10:37:25 2004 Log viewed by IP address 192.168.0.100
[INFO] Sat Jan 31 10:37:19 2004 Allowed configuration authentication by IP address 192.168.0.100
[INFO] Sat Jan 31 10:37:02 2004 Lease 192.168.0.100 renewed by client 000C6E64EC05
[INFO] Sat Jan 31 10:36:58 2004 Initialization complete, starting DHCP server
[INFO] Sat Jan 31 10:36:58 2004 L2TP local tunnel 0x0743 RTE module has shut down.
[INFO] Sat Jan 31 10:36:58 2004 L2TP local tunnel 0x0743 has been disconnected
[INFO] Sat Jan 31 10:36:58 2004 L2TP local tunnel 0x0743 RTE module is shutting down.
[INFO] Sat Jan 31 10:36:58 2004 Trying to connect to L2TP server
[INFO] Sat Jan 31 10:36:58 2004 Attempting to start always-on WAN connection
[INFO] Sat Jan 31 10:36:58 2004 Obtained IP Address using DHCP. IP address is 10.0.2.144
[INFO] Sat Jan 31 10:36:56 2004 DHCP Server Parameter 6 was added to the parameter database
[INFO] Sat Jan 31 10:36:56 2004 DHCP Server Parameter 19 was added to the parameter database
[INFO] Sat Jan 31 10:36:56 2004 DHCP Server Parameter 3 was added to the parameter database
[INFO] Sat Jan 31 10:36:56 2004 DHCP Server Parameter 1 was added to the parameter database
[INFO] Sat Jan 31 10:36:54 2004 Bringing up WAN using L2TP
[INFO] Sat Jan 31 10:36:54 2004 WAN Ethernet Carrier Detected
[INFO] Sat Jan 31 10:36:52 2004 LAN interface is up
[INFO] Sat Jan 31 10:36:52 2004 LAN Ethernet Carrier Detected
[INFO] Sat Jan 31 10:36:52 2004 Device initialized
[INFO] Sat Jan 31 10:36:52 2004 Wireless Link is up
[INFO] Sat Jan 31 10:36:52 2004 Stored configuration to non-volatile memory
[INFO] Sat Jan 31 10:36:51 2004 No Internet access policy is in effect. Unrestricted Internet access allowed to everyone
[INFO] Thu Jan 01 00:00:00 1970 Loaded configuration from non-volatile memory

Так могут-ли чего посоветовать специалисты Длинка?

Что, настолько глупый вопрос?

Можно ли по этому логу что-нибудь понять?

DGL-624+ l2tp клиент работает отлично

[INFO] Sat Jan 31 10:36:58 2004 L2TP local tunnel 0x0743 RTE module has shut down.
[INFO] Sat Jan 31 10:36:58 2004 L2TP local tunnel 0x0743 has been disconnected
[INFO] Sat Jan 31 10:36:58 2004 L2TP local tunnel 0x0743 RTE module is shutting down.
[INFO] Sat Jan 31 10:36:58 2004 Trying to connect to L2TP server
Эти строчки говорят о том, что соединение даже не начиналось.
Нужно чтобы провайдер проконтролировал Ваше подключение.