Hello.
We recently purchased an RV345 to use in our SMB setting. We have a static IP, gateway, subnet, and DNS1 & DNS2 from our WISP, and the configuration is very simple - something I've setup many, many times in the past. There is no MAC lock on the connection, as is sometimes the case with ISPs.
I powered up the RV345, logged in, changed the admin password, and set up WAN1 with the settings specified, and was shown in the WAN window that the connection was up on IPV4. But no internet connectivity. Could resolve hostnames (yahoo.com) and perform DNS lookups in the router's diagnostics area, but couldn't ping them. Machines on the network could connect to the internet, for about 30 seconds, after which no connectivity was available. The WAN status still showed IPV4 as up.
I reset the router and set it up again. Same thing. I did this many times, sometimes using DHCP, sometimes the Static IP settings. Finally I involved the ISP, and had them check things on their end. They said it looked like it was connected on their end and could see that the router was sending traffic to an IP on AWS - I'm guessing this is a Cisco firmware update check. But the issue was always the same. I could ping websites on the router or on a network device for about 20-30 seconds after re-configuring WAN1, but afterwards, nothing. No internet connectivity, though the router responded to LAN pings. I tried configuring the connection when connected to WAN2, but same thing.
Finally, I returned the RV345, thinking it may have been a hardware issue, and got a new RV340. Brand new - same exact thing. Nothing else is configured in the router - I'm literally powering it up, configuring WAN1, and then this happens. I've tried disabling the firewall in the router, but it makes no difference.
Finally, in order to rule out the possibility that it was anything other than a router issue, I brought in a Ubiquiti EdgeRouter 4 that I have as an on-hand backup router. Configured it with the same Static IP I had been using, and it worked like a charm instantly. Later still I grabbed a $50 Belkin Wireless Router we'd been using as a WAP and tried it - same thing, worked perfectly.
Does anyone have any suggestions I could try to make this work? The ONLY thing I haven't done is update the firmware. It shipped with the second-to-latest release. But, so far, every other router I've tried works perfectly after configuring the static IP. Only the Cisco RV-series appears to have problems. I'm replacing a Cisco C881 that we do not own and was only used as we used to be a branch office connected via a tunnel.
Our ISP is a WISP, or a fixed-based wireless provider. So we have an antennae and radio outside our facility. The only non-standard aspect to our install is that there's a POE injector on the WAN cable - the cable that would ordinarily be running from the ISP's modem to our router. This is because that cable powers the radio equipment on a tower outside our facility. I've run cable tests on it and they've all passed. So the CAT5 cable runs from the antennae to the POE injector, which then plugs into our router. I don't believe that these components are causing the issue.
Any help would be greatly appreciated. Not sure what to try at this point. I should add that the config on the C881 we're currently running matches the config that I'm using, with respect to the WAN configuration. They're identical.
