I have an issue that I can't seem to figure out on my own. Whenever I power on a client router, it causes connectivity issues with another router, which functions as a wireless bridge. The connectivity issues manifest as extreme internet slowness, or a complete loss of internet connectivity on the PCs I have connected to the wireless bridge. My network topology is as follows:
-> Cisco DOCSIS 3.0 Modem ---> Netgear R6300v1 (stock firmware) DHCP/NAT -----> Netgear WNDR3700v1 (10/100/1000 ethernet) * -----> Windows 7 PC (10/100/1000 ethernet) -----> Buffalo NAS 2TB (10/100/1000 ethernet) -----> Wireless Clients (802.11n 2.4Ghz & 5Ghz) -----> Netgear WNDR4000 (802.11n 5Ghz bridged-client) * -------> Windows 7 PC (10/100/1000 ethernet) -------> Windows 7 PC (10/100/1000 ethernet) * Netgear WNDR3700v1 OS: OpenWrt Barrier Breaker * Netgear WNDR4000 OS: DD-WRT v24-sp2 (07/24/13) mini
It is worth noting, that I have disabled DNS masquerading, iptables, SPI firewall, and DHCP servers on both affected routers. Both routers also have static IP addresses 192.168.1.3 for the WNDR4000 and 192.168.1.4 for the WNDR3700, and they both share the same gateway 192.168.1.1, subnet, and netmask. I have used ifconfig to check for collisions, but there aren't any on any interface on both routers. I have checked ARP tables on both routers to see if it is getting messed up, but I can't find anything out of the ordinary. I have checked dmesg, syslogd, logread, etc..., and I can't figure out why my wireless bridge has no connectivity when I turn on my other router. When I try and ping, or access the DD-WRT web interface for my wireless bridge from a PC connected directly to my R6300v1 router, the destination host 192.168.1.3 cannot be reached. As soon as I turn off my WNDR3700v1 router, my wireless bridge starts to work again. I appreciate any help I can get to resolve this.