I'm curious if the community would be willing to share their
best-practices and/or recommendations and thoughts on how they handle
situations where a customer buys X amount of bandwidth, but the physical
link is capable of Y, where Y > X. (Yes, I speak of policy-maps,
tx/rx-queues, etc.)
For example, it might be arguably common to aggregate customer links
Layer 2, and then push them upstream to where they anchor Layer 3. That
Layer 2 <-> Layer 3 could be a couple of meters or several kilometers.
So, as I see it, my options are:
* Rate-limit at the Layer 2 switch for both customer ingress/egress,
* Rate-limit at the Layer 3 router upstream, i/e, or
* Some combination thereof? E.g.: Rate-limit my traffic towards the
customer closer to the core, and rate-limit ingress closer to the edge?
I've done all three on some level in my travels, but in the past it's
also been oftentimes vendor-centric which hindered a scalable or
"templateable" solution. (Some things police in only one direction, or
only well in one direction, etc.)
In case someone is interested in a tangible example, imagine an Arista
switch and an ASR9k router. :)
Thoughts?
