My DD-WRT router has lost its mind!
(Caveat: technically neither of these devices are "routing". I'm going to call them routers anyway.)
I just set up two DD-WRT routers, one as a WAP (working fine) and one in
Client Bridge (routed) mode (the problem). Not long after setup I started seeing IP address conflicts on other machines. The event log always points the finger at my
Client Bridge router's MAC address.
Neighbour table overflow
The log on my router is flooded with
Neighbour table overflow errors. These start a minute or two after boot. The network is rather large, with +200 IP addresses being used in this subnet. The other router shows no such errors.
Mass ARP requests from 18.104.22.168
I'm also seeing constant ARP requests (with the problem router's MAC address) from 22.214.171.124. Seems like it's bugging everything on the network for its MAC address and then promptly forgetting it (or never receiving a response).
Model: Buffalo N600
Firmware: DD-WRT v24SP2-MULTI (03/21/11)
Wireless Mode: Client Bridge (routed)
brctl show output:
bridge name bridge id STP enabled interfaces br0 80000.106f3f289f6a no eth0 eth1
Neither device is configured for DHCP, however there does seem to be a rogue DHCP server on the network right now...
I'm not sure what configuration details are relevant and I'd rather not have comments flooded, so just ping me in this chat if you want to know something.