nanog mailing list archives

Re: Will wholesale-only muni actually bring the boys to your yard?


From: "Robert E. Seastrom" <rs () seastrom com>
Date: Wed, 06 Feb 2013 11:28:19 -0500


Scott Helms <khelms () zcorum com> writes:

On Wed, Feb 6, 2013 at 10:30 AM, Robert E. Seastrom <[[rs () seastrom com]]>
wrote:

               If you were talking about layer 2 handoffs, your statement
     is perhaps
     even more untrue - active ethernet and PON layer 2 handoffs are
     approximately as easy as each other.
     
Perhaps you'd share some specifics?  I certainly haven't worked on all of the
PON systems that are out there, but the ones I have worked one didn't have (or
I didn't find) a good way to separate traffic at layer 2 so that several
operators could handle their own Layer 3 provisioning for customers on the
same OLT.  

Every PON OLT that I have touched has supported both vlan-per-customer
(has scaling issues) and vlan-per-service configuration abstractions.
There are other ways to do it too (double and triple tagging) but to
keep it simple if one creates profiles along the lines of:

SP1-VOIP
SP1-VIDEO
SP1-INTARWEBZ

and repeats for sp2, sp3, etc...  trunk out the top, split off vlans
and backhaul as appropriate (choose wisely!) with appropriate QoS if
you like, to equal access provider.

Provisioning the ONT/ONU and the inter-provider interface to do so
(REST XML?  JSON?  something else?) is left as an exercise to the
implementer.

Reading this:
https://sites.google.com/site/amitsciscozone/home/gpon/gpon-vlans-and-gem-ports
may prove informative for the GPON case.

-r



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