Are 120 second DHCP leases on the WAN ok?
When looking at a firewall recently I noticed the WAN gateway issuing 120 second DHCP leases. That means pfSense renews the lease every 60 seconds. Is the renewal 100% seamless if the same IP is assigned? I'm trying to figure out if it's something I should spend more time on or if it's ok to ignore.
Not a lot you can do about it if that is what your stupid ISP is doing.
Nope, the DCHP server is the king in this situation and you won't be able to use an expiring lease any longer than the server allows you to.
JKnott last edited by
120 second lease? That's going to generate a lot of traffic on the WAN side as all customers will be renewing every minute. IIRC, the lease time from my ISP is 7 days, though it's been years since I checked. Hours or days are typical for DHCP leases.
120 second lease? That's going to generate a lot of traffic on the WAN side as all customers will be renewing every minute.
The IPs are from an on-site, ISP controlled device using the 100.64.0.0/10 space. The pfSense WAN is the only thing pulling an IP from it. Other customers would have their own device.
I was mainly wondering if it's something worth pursuing with the ISP since it's unlikely they'll do anything about it. It would take a lot of effort, so, if there aren't any significant drawbacks on the pfSense side, I'll probably end up ignoring it.
If you don't "feel" it, there's not really anything to do.