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LM1200 not connecting to MB8600 public IP
I have an LM1200-100NAS that is operating the below firmware version: FW: NTG9X07C_20.06.09.00 PRI version: 04.19 It connects to the mobile broadband just fine. The dashboard graphic...
Thanks John. (Further to my initial post, the dashboard does display an IPv6 address for the MB8600, but not a public IPv4 address.)
I can confirm that the laptop is connected to the LM1200 LAN port, and the MB8600 WAN port is connected to the LM1200 WAN port.
When I connect my laptop directly to the MB8600, I initially also only had an IPv6 address. After resetting the Ethernet adapter, eventually also got an IPv4 address. I then reconnected the MB8600 to the LM1200, but once again, had no IPv4 address. (Note that the MB8600 works fine when connected directly to the Google router.)
I've also reset the MB8600 to factory defaults. No changes to outcome. When it is wired directly to the Google router, and IPv6 capability is enabled, then the Google router displays nothing for the WAN IP. If I disable IPv6, then the MB8600 public IPv4 address is displayed. It seems like the LM1200 and the Google router have some trouble detecting the MB8600 IPv4 address when IPv6 is enabled. But the Google router continues to function, while the LM1200 does not.
Could you please check how to set your cable modem to assign both IPv4 and IPv6? LM1200 may have some limitation when using IPv6 only as WAN backhaul. We are investigating on this right now.
Thanks
John
As far as I can tell, there are no user settings with the MB8600 modem (other than UN & PW). The ISP (Xfinity) provides both IPv4 and IPv6 addresses to the modem (which I can detect based on the router settings). But, for whatever reason, only IPv6 seems to be detected by my devices (LM1200 and Google router) when both protocols are enabled. I've seen this issue raised in other forums, also. I've also discovered that, since Xfinity upgraded Gig speeds to 1.2GB, the MB8600 is becoming obsoleted. So I expect to have to replace the modem with a device that hopefully doesn't have this IPv4 addressing "feature" and has the additional speed capability.
I've now upgraded my modem to Netgear CM2000, but have exactly the same problem. Upon startup, Xfinity initially provisions the modem with an IPv6 public address, which is the only one the LM1200 detects. Any thoughts (JohnPeng?) on how to get past this? I'm guessing if the LM1200 had the same IPv6 ping option as the older LB2120 for failover, this wouldn't be an issue.