ISP changed IPv4 address and DHCP Server IP address, pfsense required manual intervention

Networking & Firewalls
1

pfsense 2.8.1.

Last night my ISP changed my WAN IP network and the DHCP Server. In the Pfsense logs I see the following:

High Latency on reported by dpinger for the old default gateway. I see that the DHCPREQUEST where sent to the old DHCP Server and they failed with a “no route to host” error. I rebooted the cable modem and with the Wan interface going down a DHCPREQUEST was sent to the broadcast IP address. I new DHCP server addresses responded and the lease was granted for a new IP address.

My questions is why wouldn’t the DHCP process, at some point, tried a broadcast to discover the new dhcp server?

Is there anything I can do to prevent this outage in the future?

thanks

2

I don’t think this was a pfsense issue. Sounds like your ISP had something happened and your modem was hung up.

3

possible and no way to recreate. In hindsight I wish I had worked on the WAN dhcp side before rebooting the CM. I just would have thought DHCP would be more aggressive to try and recover….