Solution ER605 ER7206 Failed to Obtain the IP address for WAN With 31-bit Subnet Mask - [Case Closed]
This Article Applies to:
ER605(UN)_V1_1.1.1_Build 20210723 or above firmware
ER7206(UN)_V1_1.1.1_Build 20210723 or above firmware
We noticed that a few ISPs may provide WAN IP Addresses with 31-bit or 32-bit subnet masks for Internet access.
However, our Business Routers doesn’t accept such WAN IP addresses, so the router will reject the offered WAN IP address from ISP, resulting in a WAN configuration failure.
Related feedback post:
The System Log of the ER605 shows the following error messages:
[osg:xx-xx-xx-xx-xx-xx] failed to obtain the IP address for WAN because IP-Address/Gateway can't be a broadcast address or a network address (IP-Address=xxx.xxx.xxx.xxx, Mask=255.255.255.255, Gateway=xxx.xxx.xxx.x).
To resolve the issue quickly, here we have made a Beta firmware for you,
ER605(UN)_v1_1.1.1_Build 20210926 (Beta) ER7206(UN)_v1_1.1.1_Build 20210926 (Beta) Release note: Support the WAN IP addresses with 31-bit or 32-bit subnet masks.
[Case Closed] Update:
The issue has been fixed in the official 1.2.0 firmware, please check for an update from Here.
Thank you for your attention!
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TP-Link Support Team