ER605 declines DHCP offers from LTE Modem
Wireshark was used to show that the ER605 declines DHCP offers from a Netgear MR1100 LTE Router configured as an IP Passthrough device. My previous router (a TP-Link Archer C59 running OpenWrt) worked fine with same LTE modem. The System Log of the ER605 shows the following error messages:
[osg:10-27-F5-17-63-81] failed to obtain the IP address for WAN because IP-Address/Gateway can't be a broadcast address or a network address (IP-Address=10.247.116.156, Mask=255.255.255.255, Gateway=10.247.116.1).
A partial Wireshark capture is shown below:
No. Time Source Destination Protocol Length Info
372 231.783495 0.0.0.0 255.255.255.255 DHCP 342 DHCP Discover - Transaction ID 0x9df8d423
373 231.786354 10.247.116.1 255.255.255.255 DHCP 344 DHCP Offer - Transaction ID 0x9df8d423
374 232.179619 0.0.0.0 255.255.255.255 DHCP 342 DHCP Decline - Transaction ID 0xc998102c
Could the ER605 be rejecting the offered IP address because it is in a private address range? This is unavoidable in my situation because my internet service is AT&T LTE service using carrier-grade NAT - I will always be assigned a 10.x.x.x address.