R7000, WAN dies often. Fixed in TomatoUSB, need DDWRT equiv.

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theirongiant
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Joined: 25 Apr 2009
Posts: 29

PostPosted: Sat Jan 17, 2015 3:03    Post subject: R7000, WAN dies often. Fixed in TomatoUSB, need DDWRT equiv. Reply with quote
The WAN is dropping every few days without any obvious reason. If I unplug the modem for about 2 minutes and then plug it back in, it just works.

I upgraded from an ASUS RT-N66U running TomatoUSB to a Netgear R7000 running DD-WRT. I live in the United States and my ISP is Charter Communications. While I had the RT-N66U, this issue never occurred (because I was able to fix it, see description below). Now that I have a DD-WRT router, I need an equivalent solution.

Background:
Charter and other ISPs have known to cause problems with certain equipment. What happens is that every few days, the WAN stops working until the modem is shut off for at least 2 minutes and then restarted. There is some policy on the ISP's DHCP server that rejects attempts to request an IP address too aggressively. The solution has been available in TomatoUSB for years, but I cannot seem to find an answer to this problem in DD-WRT (maybe I'm not using the right search terms). It involves changing parameters of udhcpc to reduce the frequency of DHCP requests to the WAN.

Examples:
http://forums.buffalotech.com/index.php?topic=12468.10;wap2
http://forum1.netgear.com/showthread.php?p=387795
https://forum.peplink.com/archive/index.php/t-1628.html

The options for udhcpc are:
Quote:
--retries=2 --timeout=5 --tryagain=310


Can someone point me in the right direction please?

Thanks!
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