Talk to Cambium. Sounds like the broadcast packing isn't making its way back. Do you have any of the multicast/broadcast things set?
[image: image.png] On Thu, Jan 19, 2023 at 11:32 AM Nate Burke <n...@blastcomm.com> wrote: > I've had this problem at limited times for a couple years, and I've > posted about it before here, But it's started becoming more frequent > across sites, and I curious if I'm still the only person with this problem. > > Mikrotik Router providing DHCP -> UBNT Edgepoint S16 -> EPMP 5ghz AP > (1000 or 3000) -> EPMP SM F300 -> EPMP 1000 2.4 AP (nonGPS) -> EPMP 1000 > 2.4 SM -> Customer Router. > > The Customer router will lose it's DHCP lease, and be unable to renew. > Mikrotik log fills with 'Offering lease without success' Rebooting the > EPMP 1000 2.4 AP (nonGPS) is the only way I've found to fix it. It does > not seem to affect any customers who's router is directly connected > directly to a F300 radio. Only one's that are using the EPMP1000 2.4 > radio to extend the network. > > This has happened on at least 5 sites now, and it's becoming very > annoying. Previously when I've posted, some people mentioned some Allow > firewall rules for DHCP Traffic in the mikrotik, those don't seem to help. > > My new piece of information yesterday is that I'm migrating customers > between 2 grain legs about 200 yards apart (no truck rolls, just > changing preferred AP). Both grain legs are built with EPMP 3000 Aps. > I have a customer that was installed on the new grain leg, has a > EPMP1000 2.4 AP (nonGPS) that feeds 4 EPMP1000 2.4 SMs on different > buildings and has been working fine for months. They have now had this > DHCP Issue twice now in the last 24 hours None of the 4 buildings could > get a DHCP Lease. Rebooting the 2.4 AP immediately fixed the problem. > So It's almost like this is triggered by another 5ghz SM on the 3000AP. > All SM's are set to block a DHCP Server below the SM. > > It's just strange that rebooting the 2.4 AP always fixes the problem. > Until it starts happening again, from a few hours, to several days. If > I put the EPMP1000 2.4 SM into NAT mode, it seems to be able to get a > DHCP lease from the mikrotik just fine. > > Open to any ideas. > > -- > AF mailing list > AF@af.afmug.com > http://af.afmug.com/mailman/listinfo/af_af.afmug.com >
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