Silver Spring Networks Access Point: Difference between revisions
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Add on-air identification — EUI-64 addressing, mesh-root role, backhaul |
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<gallery> | <gallery mode="packed" heights="250"> | ||
File:SilverSpringRouter1.JPG | File:SilverSpringRouter1.JPG| Top of Housing | ||
File:SilverSpringRouter3.JPG | File:SilverSpringRouter3.JPG| Interior showing cellular modem and circuit boards | ||
File:SilverSpringRouter4.JPG | File:SilverSpringRouter4.JPG| Inside of metal lid | ||
File:SilverSpringRouter5.JPG | File:SilverSpringRouter5.JPG| Model number | ||
File:SilverSpringRouter6.JPG | File:SilverSpringRouter6.JPG | ||
File:SilverSpringRouter7.JPG | File:SilverSpringRouter7.JPG| GPS and cellular antenna connector | ||
File:SilverSpringRouter8.JPG | File:SilverSpringRouter8.JPG| Power connector | ||
</gallery> | </gallery> | ||
== On-air identification and role == | |||
(From passive capture of a fixed-AMI NIC 511 network — see | |||
[[Silver Spring Networks Protocol]] for the frame format.) | |||
Access points are the root of a local mesh cell: endpoints and relays route | |||
toward them, and they backhaul to the utility head-end over cellular (the modem | |||
in the teardown photos above) or fibre. | |||
They are addressed by '''EUI-64''', distinct from endpoint meters: | |||
* Access point / infrastructure: <code>00:13:50:FF:FE:60:xx:xx:xx</code> — the | |||
Silver Spring OUI <code>00:13:50</code> with the standard MAC-48 → EUI-64 | |||
<code>FF:FE</code> expansion. The Itron OUI <code>00:07:81</code> is also seen | |||
post-acquisition. | |||
* Endpoint meters: serial form <code>00:13:50:05:00:xx:xx:xx</code>. | |||
An access point is '''not heard directly''' from an endpoint's vantage — it sits | |||
on the far side of the tree on channels a fixed receiver near one meter does not | |||
follow. It is identified instead by reference: a [[Silver Spring Networks Relay|relay]] | |||
lists its uplink access point(s) in its beacon's neighbour records, each with a | |||
link-quality metric. In one capture a relay was dual-homed to two access points | |||
(a stable primary and a volatile secondary) for the whole observation window. | |||
Latest revision as of 20:56, 31 August 2026
-
Top of Housing -
Interior showing cellular modem and circuit boards -
Inside of metal lid -
Model number -
-
GPS and cellular antenna connector -
Power connector
On-air identification and role
(From passive capture of a fixed-AMI NIC 511 network — see Silver Spring Networks Protocol for the frame format.)
Access points are the root of a local mesh cell: endpoints and relays route toward them, and they backhaul to the utility head-end over cellular (the modem in the teardown photos above) or fibre.
They are addressed by EUI-64, distinct from endpoint meters:
- Access point / infrastructure:
00:13:50:FF:FE:60:xx:xx:xx— the
Silver Spring OUI00:13:50with the standard MAC-48 → EUI-64FF:FEexpansion. The Itron OUI00:07:81is also seen post-acquisition.
- Endpoint meters: serial form
00:13:50:05:00:xx:xx:xx.
An access point is not heard directly from an endpoint's vantage — it sits on the far side of the tree on channels a fixed receiver near one meter does not follow. It is identified instead by reference: a relay lists its uplink access point(s) in its beacon's neighbour records, each with a link-quality metric. In one capture a relay was dual-homed to two access points (a stable primary and a volatile secondary) for the whole observation window.