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Forum Discussion
Losing DHCP leased IP address after some time
I'm running two NETGEAR switches in my network: 1 x NETGEAR JGS524PE (Latest firmware: 2.6.0.48, defaulting to 84.193.203.32) 1 x NETGEAR GS108Ev3 (Latest firmware: 2.06.14, defaulting to 192.168....
schumaku wrote:Appears the Smart Managed Plus switch models are ignoring the common DHCP standards like a refresh at 50% and renewal on the time given by the DHCP server. Instead, they seem to have a hard coded renewal time of two hours. If the DHCP server isn't available, the devices fall-back to the default IP address 192.168.0.239.
That's useful knowledge. I don't know however why (the DHCP service on) my router wouldn't be available though? It's running 24/7, just like my switches.
The only scenario that I can come up with where my router is down and my switches aren't is in case of a power failure and my switches are booting faster than my router. I've just recently renewed the IP addresses on both switches, so I'll try and check on a regular basis (daily) their DHCP assigned IP address and see if they lose it even if there weren't any device reboots / power failures.
Thanks for chiming in.
I can confirm the problem with the dhcp leases. I have already documented it in this thread some weeks before. In my case my dhcp server was down due to a necessarry reboot of the operating system. It is a pity that the switch ignores all lease times pushed by the DHCP server and immediately falls back to a default IP address. It should at least try for some time to renew the IP address like access points do...
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