Muni fiber: L1 or L2?

Mon Feb 4 22:28:27 UTC 2013

Jean-Francois Mezei wrote:

> This is where one has to be carefull.  The wholesale scenario in Canada
> leaves indepdendant ISPs having to explain to their customers that they
> can't fix certain problems and that they must call the telco/cableco to
> get it fixed. (in the case of a certain cable company, they can't even
> call them, it has to be done by email with response of at least 48 hours).
> 
> So splitting responsabilities can be an annoyance if it becomes very
> visible to the end users.

No different from competing ISPs using DSL or PON.

> Another aspect: customers espect to be able to switch seamlessly from
> one ISP to the next. But ISP-2 can't take over from ISP-1 until ISP-1
> has relinquised control over the line to the end user.

No different from competing ISPs using DSL or PON.

> In a layer 1
> scenario, it means ISP-1 has to physically go and deinstall their CPE
> and disconnect strand from their OLT, and then ISP-2 can do the reverse
> and reconnect evrything to provide services.

No. Just say optical MDF.

> What happens when ISP-1 isn't interested in a quick disconnect and ISP-2
> has to wait days/weeks with end use without service ?

You assume ISP-1 quickly stop servicing the end user, don't you?

> In a layer2 service, it is a matter of reconfiguring the OLT to pass
> ethernet packets to a different VLAN to a different ISP.  No physical

What happens when OLT operator isn't interested in a quick
reconfiguration, ISP-1 quickly stop servicing the end user
and ISP-2 has to wait days/weeks with end user without service?

						Masataka Ohta