Is it possible to configure different lease times for DHCPv6 server and DHCPv4 server ? (like 15m for v4 and keeping 12h for v6 ?)
I tried without success, on many different OpenWRT versions, with ' ra_useleasetime'
The same config sections and paramaters are used to configure 2 different services (dnsmasq and odhcpd) ... do someone know how to define the 2 leasetimes separatly ?
I ask that because, for any openwrt version > 20 I tried (so 21.x and snapshot) DHCPv6 stop sending leases (leases including IPv6-PD of course) if 'leasetime' is < 12h and I want to configure shorter lease time 1h for my v4 scopes
I don't know if it is a bug or not, but if I can have different lease times for the 2 services it can work for me
yes, thanks @murraydr44 , I know
if I change that I loose any DHCPv6 functionnality (no more DHCPV6 send to host, no more DHCPv6 sent to my donwstream rooters) .. I need to decorelate the 2 lease times, v6 vs v4
Interesting use-case actually. As far as I can see it, this indeed isn't possible at the moment.
The only somewhat remote possibility is overriding the leasetime on per-static lease basis, but that would require either all your IPv6 or IPv4 clients to have a static lease entry each.
Hi,
it is not a "use case", it is a bug on the DHCPv6 behaviour
I just try to find a solution to have shorter ipv4 leases
but if I reduce the lease time I losse all DHCPv6, perdiod ... not great
If I can find at least a way to decorelate v4 and v6 leases it is fine for me until the problem is solved
I don't how how to declare a bug, I also don't know if "IPv6" devs are aware of this behaviour, so I'm stuck trying workarounds
Thanks, it works !
I have to let the leasetime at 12h, so I can collect the clients dhcpv6 DUID
then I can create static v6 leases for the most importants clients with a 12h, and then it is possible to set the global 'leasetime' to 1h
any host without static lease time will not be able to get a stateful GUA but this workaround covers my main needs
