I just had a problem where the computers in my house that were all using a wired connection could not talk to each other. Computers on wired connections could not ping, and ping kept giving an error saying “destination host unreachable”. I found the solution in a very hard to find forum post on the dd-wrt forums.
This specific instance of the problem affects users of the dd-wrt firmware. In my case, I am using build 24461 of the firmware. The solution is to run the following commands on the router (either with ssh or telnet):
swconfig dev eth0 set enable_vlan 1
swconfig dev eth0 set apply
I’ve since put this in the startup commands that the router will execute, so these settings will stay even after a router reboot.
For some routers, it might be eth1 instead of eth0. It depends on which network interface is assigned to the WAN. This can be check in the router page under Setup > Networking.
Link to forum post: http://www.dd-wrt.com/phpBB2/viewtopic.php?t=152738&postdays=0&postorder=asc&start=0
Ryan April 25, 2015
Thank you!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! God, so much time wasted lol. Thank you.
Leo May 26, 2015
Many thanks! Same issue on 841ND using 25648 build. After running these commands, my home network works well again. Regards.-
henrypoon May 26, 2015 — Post Author
Awesome to hear!
jose11 February 3, 2016
Thanks, it helped a lot
Hector August 1, 2017
Helped me more than 2 years later! Thank you very much!
henrypoon August 8, 2017 — Post Author
Good to hear!!!