Thank you Janos. Two clarifications under retained text, with the rest
elided.
Yours,
Joel
On 10/19/18 3:10 PM, János Farkas wrote:
....
On 9/22/2018 2:59 AM, Joel Halpern wrote:
....
Minor issues:
Section 3.1 states that worst case delay for priority queueing is
unbounded. That does not match my understanding. I know that DelayBound
DSCP behavior tightly (although, I think, not as tightly as Detnet) limits
both the worst case delay and the delay variation.
Strict priority is not good enough for DetNet. A high priority packet
may need to wait until the transmission of a lower priority packet is
finished at an outbound port, which can cause too much uncertainties in
the network.
I understand that strict priority queueing is viewed as insufficient. I
wasn;t arguing about that. I was arguing with the use of the word
"unbounded". As far as I can tell, with suitable priority queueing the
worst case delay is bounded, simply not well enough bounded.
....
In section 4.1.2, I realized that the Detnet Transit node terminology had
mildly confused me. The text says "DetNet enabled nodes are interconnected
via transit nodes (e.g., LSRs) which support DetNet, but are not DetNet
service aware." Reading this, and the definitions in section 2.1, it
appears that a Detnet Transit node is a node that is providing transport
behavior that detnet needs, but is not actually modified for detnet.
Based on last call comments:
https://www.ietf.org/mail-archive/web/detnet/current/msg01791.html, the
phrase "DetNet enabled nodes" is removed from the document and it has
been made clear what type of DetNet node is meant:
The text is updated to:
A "Deterministic Network" will be composed of DetNet enabled end
systems, DetNet edge nodes, DetNet relay nodes and collectively
deliver DetNet services. DetNet relay and edge nodes are
interconnected via DetNet transit nodes (e.g., LSRs) which support
DetNet, but are not DetNet service aware.
Any chance you could simply say "transit nodes" instead of "DetNet
transit nodes? As far as I can tell, they are existing nodes that were
designed and implemented (and even configured) potentially before DetNet
was even defined?
....
