Rich Freeman on 3 Sep 2012 13:08:18 -0700

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Re: [PLUG] Strange networking (or Verizon marketing) question.

On Mon, Sep 3, 2012 at 2:15 PM, Robert Spangler <> wrote:
> On Monday 03 September 2012 07:35, the following was written:
>>  Some part of Verizon’s system may have memorized the MAC address of the
>>  computer. If it is the DSL modem, power-cycling it may be enough. If it is
>>  the endpoint on Verizon’s side of they connection you may have to try to
>>  convince tech support that your MAC changed. A less annoying way would be
>>  to have the router spoof the computer’s MAC.
> No need to call any tech support.  Just leave the devices unplugged from the
> DSL Modem for ~ 5 minutes and the known MAC should get erased from the switch
> table allowing a new device to be plugged in.

I've never heard of a Verizon DSL modem actually caching a MAC address
- that is the sort of thing normally associated with cable companies.
The FIOS ONT might do it - since it issues the IP to the router via
DHCP and of course that comes with a lease.  The lease is longer than
5 minutes though, and I think the lease comes from further upstream
than the ONT, so the only way to get out of that is to unplug the
router for hours or call up support.

Verizon DSL typically assigns an IP via PPPoE (at least, that is how
they used to do it), and that is a session-based protocol.  If you
drop your PPP session (it times out pretty quickly I'd think), then
there is no lease beyond that.

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