Hello, all.
I was recently forced to transition to a new ISP as my prior ISP was acquired by a national carrier (Rogers).
Rogers DHCP lease is one hour.
Messages log shows the renewal time (roughly half what "ip -4 a s" reports), a ton of ignored DHCPREQUESTs to the IP of the DHCP server, then to 255.255.255.255, and finally a DHCPDISCOVER, DHCPREQUEST (to 255.255.255.255), DHCPOFFER (from the IP of the DHCP server) and finally a DHCPACK. All pretty much by the book.
But the IP must have been released when the handshake starts, as right after that, this happens:
Processing event: ip-change
Along with everything that entails. Every hour. The External IP does not change - I get the same one every time.
I set up a second server to test the behaviour, since I got bit by bug
11930 before the patch came out, and it affected openvpn-bridge as well, which created quite a mess. I wanted to be sure the behaviour could be duplicated.
Normally, I wouldn't be too concerned, as this is "the way" of DHCP (and my
new ISP), but it seems to disrupt any real-time goings-on (like Zoom/Teams meetings) and sometimes bad enough that the session needs to be restarted. And this should not happen.
Does anyone out there with more network savvy think this is a problem, or "de rigueur" where one hour leases are concerned?? Could the IP be held for a few extra seconds so as not to disrupt traffic or trigger ip-change??? (I'm guessing the latter would be an upstream problem, and likely not a problem at all - but I have to ask...)
Thanks in advance for the feedback.