Are 120 second DHCP leases on the WAN ok?
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Hi,
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.
TIA,
Ryan -
Not a lot you can do about it if that is what your stupid ISP is doing.
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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.
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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.
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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.
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If you don't "feel" it, there's not really anything to do.
