Configure LAN port as WAN on WR841N

[pehape]

Hi,

after a storm my router's WAN port stopped working properly, I suspect it's broken. I found a couple results on how to change the switch configuration to use a LAN port as a new WAN port, however they are based on different models/firmwares and I can't see how to adapt them for my case.

My /etc/config/network is as follows:

config interface 'loopback'
option ifname 'lo'
option proto 'static'
option ipaddr '127.0.0.1'
option netmask '255.0.0.0'

config globals 'globals'
option ula_prefix 'fd6c:a43f:74a3::/48'

config interface 'lan'
option ifname 'eth0'
option force_link '1'
option type 'bridge'
option proto 'static'
option netmask '255.255.255.0'
option ip6assign '60'
option ipaddr '192.168.2.1'
option dns '192.168.2.1'

config interface 'wan'
option ifname 'eth1'
option proto 'dhcp'

config interface 'wan6'
option ifname '@wan'
option proto 'dhcpv6'

config switch
option name 'switch0'
option reset '1'
option enable_vlan '1'

config switch_vlan
option device 'switch0'
option vlan '1'
option ports '0 1 2 3 4'

Thanks!

[Lantis]

Everything you need to accomplish this is on this page:
http://wiki.openwrt.org/toh/tp-link/tl-wr841nd
In particular the switch configuration table.

Your situation - Old
WAN - Eth1
LAN1,2,3,4 - LAN ports

Your situation - New
WAN - Dead.
LAN1 - New WAN
LAN2,3,4 - LAN ports

Solution.
Throw Eth1 in the bin, it's dead (i.e. Don't assign anything to it)
Create 2 VLANs. 1 for your new WAN and one for your new LAN ports.
We will call the LAN one Eth0.1, and the WAN Eth0.2.

Code: Select all

config interface 'loopback'
option ifname 'lo'
option proto 'static'
option ipaddr '127.0.0.1'
option netmask '255.0.0.0'

config globals 'globals'
option ula_prefix 'fd6c:a43f:74a3::/48'

config interface 'lan'
option ifname 'eth0.1'
option force_link '1'
option type 'bridge'
option proto 'static'
option netmask '255.255.255.0'
option ip6assign '60'
option ipaddr '192.168.2.1'
option dns '192.168.2.1'

config interface 'wan'
option ifname 'eth0.2'
option proto 'dhcp'

config interface 'wan6'
option ifname '@wan'
option proto 'dhcpv6'

config switch
option name 'switch0'
option reset '1'
option enable_vlan '1'

config switch_vlan
option device 'switch0'
option vlan '1'
option ports '0t 1 2 3'

config switch_vlan
option device 'switch0'
option vlan '2'
option ports '0t 4'

You should apply these changes via WiFi or you'll lose connection to the router.
Also restart the network to apply the changes.

[pehape]

Thanks!

That worked perfectly

[TomaszM]

Great topic !

now i have the same problem, very similar etc/config/network

config interface 'loopback'
option ifname 'lo'
option proto 'static'
option ipaddr '127.0.0.1'
option netmask '255.0.0.0'

config globals 'globals'
option ula_prefix 'fd8d:4f68:4d2X3::/48'

config interface 'lan'
option ifname 'eth0.1'
option force_link '1'
option type 'bridge'
option proto 'static'
option ipaddr '192.168.1.1'
option netmask '255.255.255.0'
option ip6assign '60'
option dns '192.168.1.1'

config interface 'wan'
option ifname 'eth1'
option proto 'dhcp'

config interface 'wan6'
option ifname 'eth1'
option proto 'dhcpv6'

config switch
option name 'switch0'
option reset '1'
option enable_vlan '1'
option blinkrate '2'

config switch_vlan
option device 'switch0'
option vlan '1'
option ports '0 1 2 3 5t'

config switch_port
option device 'switch0'
option port '1'
option led '6'

config switch_port
option device 'switch0'
option port '2'
option led '9'

config switch_port
option device 'switch0'
option port '5'
option led '2'

but ..... i don't know how to edit ... change this file
help rookie !
which command ... which parameters

[Lantis]

The easiest way is to use WinSCP for Windows.
The address is the IP of the router (usually 192.168.1.1).
Password is your password.
Set the protocol to SCP.

Do you understand everything else in the thread?
You need the port table from here: https://wiki.openwrt.org/toh/netgear/wndr3700

Code: Select all

Port.              Switch port
CPU (eth0).           5
No port.              4
LAN 1.                3
LAN 2.                2
LAN 3.                1
LAN 4.                0

And you need to create two VLANs.

[TomaszM]

WinSCP was better idea, thanks !!!

Anyway i just copied your previous solution code .... and it doesn't work

My situation:
WAN - Dead
LAN1 - New WAN
LAN2,3- LAN ports
LAN4 - Dead

[Lantis]

Because that is for a different router. Yiu need to develop your own settings using the port table.

Your WAN vlan will be 3, 5t
Your LAN vlan will be 1,2,5t

[TomaszM]

So for may WNDR3700v2 it should be sth like this ?

• config interface 'loopback'
  option ifname 'lo'
  option proto 'static'
  option ipaddr '127.0.0.1'
  option netmask '255.0.0.0'
  
  config globals 'globals'
  option ula_prefix 'fd8d:4f68:4d2X3::/48'
  
  config interface 'lan'
  option ifname 'eth0.1'
  option force_link '1'
  option type 'bridge'
  option proto 'static'
  option ipaddr '192.168.1.1'
  option netmask '255.255.255.0'
  option ip6assign '60'
  option dns '192.168.1.1'
  
  config interface 'wan'
  option ifname 'eth0.2'
  option proto 'dhcp'
  
  config interface 'wan6'
  option ifname 'eth1'
  option proto 'dhcpv6'
  
  config switch
  option name 'switch0'
  option reset '1'
  option enable_vlan '1'
  option blinkrate '2'
  
  config switch_vlan
  option device 'switch0'
  option vlan '1'
  option ports '1 2 5t'
  
  config switch_vlan
  option device 'switch0'
  option vlan '2'
  option ports '3 5t'
  
  config switch_port
  option device 'switch0'
  option port '1'
  option led '6'
  
  config switch_port
  option device 'switch0'
  option port '2'
  option led '9'
  
  config switch_port
  option device 'switch0'
  option port '5'
  option led '2'

[Lantis]

Looks good to me

[TomaszM]

but it doesnt work.....