Lately I’ve been messing with my home network - long story short I ended up buying new router because my old Buffalo WZR-HP-G300NH was starting to having problems with wifi signal strength out of the blue. So I ended up with NetGear N300 v2 running Tomato by Shibby and a smaller one TP-LINK WR710N for the other room. And here is the kicker - none of routers was able to obtain IP address on WAN port via DHCP (after cloning mac address of wan port, as mac was filtered by my Internet provided).
I tried different configurations, different firmwares, but it seems like only my Buffalo (running OpenWRT) was working fine. After wasting hours and reading many forums I decided to check default
udhcpc settings on OpenWRT very next morning and there I had epiphany - Tomato used different configuration, and to be exact two options were missing:
-t 0- Send up to N discover packets
-C- Don’t send MAC as client identifier
- go to Settings -> Advanced -> DHCP Client (WAN)
- In DHCPC Options simply add
-t 0 -C, click save and enjoy obtained IP address. I’m guessing this is required by some routers on the other end (didn’t bothered to dig deeper into this)
I hope this tip will save some time for some lost souls like me ;).