I am hoping you can assist in pointing in the right direction. I have recently replaced a Cisco RV340W with an RB4011iGS+5HacQ2HnD, for some reason my configured WAN interface, whether on the SFP Port or ether1 loses its DHCP lease with the ISP Cable Modem, which is in bridge mode.
Just before this failure this is displayed in the ROS logs:
interface,info ether1 link down
dhcp,info dhcp-client on ether1 lost IP address x.x.x.x - lease stopped locally
system,info device changed by admin
interface,info ether1 link up (speed 1G, full duplex)
interface,info ether1 detect LAN
in a packet capture I see a lot of resets and duplicate acknowledgements. I am a bit stuck as to where to start, as this seems to be some weird interaction between the two ethernet devices. Any pointers on where to start would be greatly appreciated.
And the cable modem becomes inaccesible
My experience with Compal DOCSIS modems it that when they loose the connection to the headend they switches over to a 192.168.100.0/24 range so you can access the web-admin-page, even when bridged. When the connection is restored it switches back to bridged mode (with the 192.168.100.1 address still accessible)
Indeed, I have netcat probing for port 80 being open on the thing, when the error state occurs, the port ends up closed, and isn’t even arpingable. Seems something on the MK side is horking the modem. It just becomes a brick, no DHCP, or any upstream comms when plugging another device into one of the three ports on it. I downgraded ROS to the stable channel (6.45.9) and it went from failing five times an hour to just five times today. So, far better.