DHCP leases not persistant after restart

Question

I work with IP set top boxes, home networks, etc.&nbsp; Recently I upgraded a MoCA based network that had individual access points to Orbi hoping to take advantage of a mesh network.&nbsp; Unfortunately I've run into a number of stability issues which I think may be impacting a lot of other users based on several threads I have run across.&nbsp; I am running the latest v2.2.1.210 and I haven't used any other versions.
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&nbsp;Every time the router restarts when I apply a change, reboot, etc. the whole network falls apart.&nbsp; I plugged in a sniffer and I'm seeing all kinds of IP address conflicts among other things.&nbsp; It turns out the router does not persist the IP addresses it previously assigned and after reboot all my smart plugs, echo dots, etc. are all stomping all over each other.&nbsp; This is really unbelieveable.&nbsp; I've never seen anything like this.&nbsp; The network just goes to pot, ARP (address resolution protocol) goes nuts, and it takes awhile for all the addressing to resolve itself.&nbsp;
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Another concerning issue is that the Satellite keeps sending out ARP requests from 192.168.1.250.&nbsp; This must be some preconfigured IP address which doesn't even match the configured network of 192.168.0.0/24.&nbsp; I changed the default network to match my previous network to match some static devices.&nbsp; The Orbi Satellite does show an address like 192.168.0.27 in addition to the bogus one, but it is random on boot and often stomps on other devices.&nbsp; I'm not surprised so many people have problems with what I've seen so far on the sniffer.&nbsp; I'm getting close to ripping it all out or else putting in my own DHCP server.&nbsp; I do this stuff for a living, it's not how I want to spend my freetime.

ekhalil · Answer

NetworkEng&nbsp;wrote:
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Another concerning issue is that the Satellite keeps sending out ARP requests from 192.168.1.250.&nbsp; This must be some preconfigured IP address which doesn't even match the configured network of 192.168.0.0/24.&nbsp; .........

This IP address must be coming from another router in your network. Are you sure that the ISP modem (the internet box) is bridged and is not acting as another DHCP server in the network?

NetworkEng · Answer

There are no other routers in the network.&nbsp; The cable modem is a Netgear CM1100.&nbsp; The IP 192.168.1.250 has the same MAC address as the other IP 192.168.0.27 that the Orbi Satellite is using.&nbsp; It's just bad behavior, some static backup IP configured on the satellite.&nbsp; It just sits there arping for all the IPs it used to know about before the restart of the Orbi router.&nbsp; All the network clients ignore it since it's on the wrong network.&nbsp; It just suggests to me the router/satellite combo doesn't fully reconfigure itself to the new network range.
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I'm actually more concerned about the lack of DHCP lease persistance.&nbsp; Every time I restart the router everything gets a new address (and yes it's the Orbi doing the DHCP).&nbsp; Ironically I noticed it&nbsp;while&nbsp;reserving static IP addresses to avoid things like printers changing IP addresses.&nbsp; I recall folks were having a problem with a particular doorbell and the solution was to give it a static IP.&nbsp; DHCP servers need to remember the addresses they have already assigned when they restart or else there is chaos.

ekhalil · Answer

NetworkEng&nbsp;wrote:
.......&nbsp; Ironically I noticed it&nbsp;while&nbsp;reserving static IP addresses to avoid things like printers changing IP addresses.&nbsp; .......

How do you do "reserve static IP addresses"?

ekhalil · Answer

NetworkEng&nbsp;wrote:
........&nbsp;The IP 192.168.1.250 has the same MAC address as the other IP 192.168.0.27 that the Orbi Satellite is using.&nbsp;.......

I think I saw this IP address assigned at first to my satellite. It seems it's a default "temporary" IP address for the satellite when it has no connection to the router. Once the satellite finds the router it will get assigned the correct IP address by the router.

st_shaw · Answer

The satellites do have 192.168.1.250 hardcoded as a backup address. This is used if the satellite is not configured, but I'm not sure whether this is used at every boot-up or only when the satellite has been reset and has no prior configuration.
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I'm not sure about the DHCP issues you are having. &nbsp;I run my Orbi in AP mode with another router so I don't see anything like this. &nbsp;What you describe doesn't make sense though. &nbsp;Devices receive addresses via DHCP and will hold onto the addresses until the lease expires. &nbsp;Clients don't know the Orbi rebooted and restarting Orbi doesn't&nbsp;cause your devices to request new addresses.
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Something else must be going on. &nbsp;Hard coding IPs into devices&nbsp;could cause problems, if the hard coded addresses were within the DHCP range of Orbi.
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DHCP leases not persistant after restart

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