We ran into this issue two weeks ago with Google as our SAS. Google had an outage, and cnMaestro lost connectivity. We had a bunch of radios get Suspended, it was a mess. Cambium verified it was the Google outage that caused the issue, but what is interesting about this, is that Evan at Cambium thought the folks on Federated wouldn’t see this behavior if Federated had an outage. There were some complicating factors we didn’t follow up on, like SMs hopping to a secondary color code AP as part of it. This factored into the suspended grant, but Evan thought Federated held the grant for 24 hours so that wouldn’t happen. Looks like the behavior is the same.
We upgraded to 16.2 (From 16.2 Beta 5) as there were some fixes for SMs reconnecting to APs in there, but we still experience a handful of SMs that have to physically be power cycled if they lose connection to the AP in order to reconnect. This never happened before the CBRS firmware versions. We aren’t sure if this problem is related to the way grants are managed between cnMaestro and the SAS or just some other bug in the firmware and is an unrelated problem. Regards, David Coudron From: AF <af-boun...@af.afmug.com> On Behalf Of Ken Hohhof Sent: Monday, April 6, 2020 3:33 PM To: 'AnimalFarm Microwave Users Group' <af@af.afmug.com> Subject: Re: [AFMUG] anybody else having Cambium CBRS issues this afternoon? I got a response on my ticket with Cambium that Federated had a problem: “Federated Wireless has reported an issue with their SAS connectivity around 13:15 ETD. Federated Wireless has resolved the connectivity issue and is currently investigating the cause of the outage.” Somehow I thought that in the event cnMaestro lost communication with the SAS, it wouldn’t terminate the grants. Yes, the 5 minute heartbeat timeout is a pain. Especially since the SAS only protects incumbents, there is no protection of GAA vs GAA. So until the PAL auction, in areas with no incumbents (we have no coastal radar in Illinois) the SAS basically just approves all grants. It is an extremely complicated system that currently isn’t doing much other than giving us some additional clean spectrum. Which ain’t nuthin’. The heartbeat thing seems aimed at letting PAL owners (read: mobile carriers) kick us off our channels. And I’m not really clear on how that happens. We request a 20 MHz channel at 3560 but now a bunch of PAL sites start operating and we can’t have that frequency or that channel width any more, do we get a new grant that automatically gets pushed out to the radios, or do our grants just get terminated and we need to take manual action to get the customers back online. I guess that’s a battle to fight another day. From: AF <af-boun...@af.afmug.com<mailto:af-boun...@af.afmug.com>> On Behalf Of Matt Hoppes Sent: Monday, April 6, 2020 2:24 PM To: AnimalFarm Microwave Users Group <af@af.afmug.com<mailto:af@af.afmug.com>> Subject: Re: [AFMUG] anybody else having Cambium CBRS issues this afternoon? Didn’t I say this would happen? And I was a shored by the vendors, the SAS providers, and everyone else that this wouldn’t happen. Here we are not even really into full production and a provider is down and people have customers down because the grounds don’t last more than five minutes. These grants need to at least last 24 hours if not longer, for this type of situation. On Apr 6, 2020, at 3:05 PM, Josh Luthman <j...@imaginenetworksllc.com<mailto:j...@imaginenetworksllc.com>> wrote: Mark @ Amplex said he has problems with CNM + Federated. Josh Luthman Office: 937-552-2340 Direct: 937-552-2343 1100 Wayne St Suite 1337 Troy, OH 45373 On Mon, Apr 6, 2020 at 2:34 PM Ken Hohhof <af...@kwisp.com<mailto:af...@kwisp.com>> wrote: I have multiple sectors apparently having SAS heartbeat timeouts and getting their grants terminated. Which is bad, bad, bad, because customers go down when that happens. Separate but unrelated, I am having problems with v14 of the import spreadsheet template they just released, two error messages, can’t import to add SMs or sectors. -- AF mailing list AF@af.afmug.com<mailto:AF@af.afmug.com> http://af.afmug.com/mailman/listinfo/af_af.afmug.com -- AF mailing list AF@af.afmug.com<mailto:AF@af.afmug.com> http://af.afmug.com/mailman/listinfo/af_af.afmug.com
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