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Forum Discussion
DHCP leases not persistant after restart
I work with IP set top boxes, home networks, etc. Recently I upgraded a MoCA based network that had individual access points to Orbi hoping to take advantage of a mesh network. Unfortunately I've r...
I agree it's likely a temporary IP so the the Orbi router can configure the satellite. I was just surprised to see that it was also sending out arp requests because it's on the wrong network once the network gets changed so it's broken in that regard. It doesn't seem to cause any problems, unlike the DHCP issue. I'm a little surprised on that one because most developers leverage linux source and dhcpd is one of the best and certainly maintains a lease file for use on restart.
FYI, static reservations are under Advanced->Setup->LAN Setup. You can either select an existing DHCP reservation and turn it into a static reservation (client still uses DHCP but always gets the same address) or you can add a new MAC address entry for a device that has a static IP manually configured. The second case prevents a duplicate DHCP assignment of that same address if it's within DHCP scope range. A good DHCP server should always check to see if addresses are in use before assigning them. That doesn't seem to happen either.
NetworkEng wrote:
I was just surprised to see that it was also sending out arp requests because it's on the wrong network once the network gets changed so it's broken in that regard. It doesn't seem to cause any problems, unlike the DHCP issue. I'm a little surprised on that one because most developers leverage linux source and dhcpd is one of the best and certainly maintains a lease file for use on restart.
Sounds like the satellite is having trouble getting its configuration from the router.
Sounds like something in your network configuration might be causing issues.
You mentioned the network was MoCA and had access points. Are you running wired backhaul over MoCA with Orbi? If so, revert to wireless backhaul and see if that resolves your issues.
I replaced all the MoCA access points and router/modem (from a major cable industry leader that I used to work for and do backend engineering support for). The current network is as simple as it gets. Its the CM1100->Orbi->Orbi Satellite. The backhaul is wireless. The satellite does probably use the hardcoded 192.168.1.250 while the router reboots. It actually uses both for awhile. I sort of regret mentioning that issue because it is probably temporary and doesn't really matter. Its just extra arp noise. All I really care about is the DHCP server needs to remember the addresses it has assigned after it restarts. I assume this happens to lots of other people but they don't notice or they don't realize why the network falls apart periodically.