Dino Farinacci wrote:
The hosts do not have visibility of the path. They only know the
other
end is sending them packets. And you get this as well from a
router-based approach.
Dino,
in both host-based and network based solutions, the availability
status
of a path needs to be measured through the delivery, or the lack of
delivery, of packets. My point is that the faithfulness of such
measurements differs between host-based and network-based solutions:
Agree, but thats much different than having "end-to-end path
visibility". Visibility of the path is knowing each node along the
path which either approach doesn't have by default.
For host-based solutions, delivery of a packet is reliable evidence
that a path is available because the packet has traveled the entire
end-to-end path. For network-based solutions, delivery of a packet is
less reliable evidence, because it doesn't account for path failures
downstream of the router receiving the packet.
Yes, but there is typical packet loss in the core than the edges. So
it's a probability game.
Dino
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