Hello,
This seems more like an issue on the provider's side, but you can try to initiate DHCP renewal.
Login to the router via SSH first. Enter the following command to find the ID of udhcp process:
Look for a process similar to the one below with eth1.
- udhcpc -p /var/run/udhcpc-eth1.pid
The enter the following command:
Replace <ID> with the value shown by command above.
In parallel you can have another SSH instance opened running command:
This will help to determine, whether the lease gets renewed immediately by providing the logs output.
Otherwise, I would like you to attach a troubleshoot file to your question. Please, replicate the issue, then access router's WebUI, go to System -> Administration -> Troubleshoot section and download troubleshoot file from there. The logs in the file might provide more insight into the issue.
Best regards,