On 12/27/24 18:28, Tom Beecher wrote:
These days, it's a LOT easier to get dedicated ethernet wave service
between A and Z than it used to be. The pseudowire options were
developed to fill that gap that customers wanted.
Still certainly use cases for it, but generally the dedicated waves
are much easier to get and probably cheaper. The providers would
certainly prefer NOT to sell you that service either in most cases,
because they don't want the overhead of running their parts either,
and would like to see it die on the vine.
You begin to run into commercial and technical constraints (let's not
call them limits) when your EoMPLS orders start to enter the 15G - 20G
range and higher.
Technically, if a customer wants DWDM-type behaviour where the path is
fixed, you have to build an RSVP-TE tunnel, which is admin. It's
possible this can be done more easily with SR-MPLS, but it's still a bit
of admin. Then you have to make considerations for failure scenarios in
your core, and how you guarantee your pw customer remains happy.
Commercially, if customers do not demand DWDM-type behavious driven by
ERO's, you have a conundrum about whether you charge for automatic
protection or not, because without an ERO, the customer will failover
when the backbone fails over due to a core outage of some sort.
Mark.
