We currently have zero out of band management anywhere (hundreds of locations/stores/branch offices). In areas where we do have the actual out of band management interface hooked up, it's just hooked back to the in-band management VLAN so it really doesn't help us reach the equipment in the event the in-band network goes out.
I was thinking of using something like Twilio Programmable Wireless to facilitate wireless out of band management access. We're talking $2 a month per connected cellular device and then metered billing for data. The thought is that this cellular network would only be used if the in-band management network goes down and therefore have almost no cellular data cost associated with it. When a site did go down, and the management network was accessed, we're only talking a MB or two for the SSH session to the equipment.
Does anyone have any experience with metered SIMs in OOBM solutions? I was looking at opengear but I've never used one before and may just get one to test out. Connectivity should allow for two devices minimum (1 router and 1 switch) either via the serial console or the ethernet OOBM port. Thoughts?
These locations also have no POTS lines so no modem to dial in with.
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