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All:
going
through my notes I would like to address certain terms.
Terms
for the RAH:
objectives: scalable
objectives: meet applications, SLA
enabled
objectives: robust, carrier grade?
reserve 1: reserved all the way around the
ring
reserve 2: reserved on a link
reclaimed BW
non-reclaimed BW
ring
access
ingress access
QoS
classes: High, medium, and low
QoS classes: A,
B, and C
Behavior: packet loss
Behavior:
jitter
access jitter, ring
fitter
Behavior:
delay
Behavior:
utilization
throughput and
goodput
Fairness
behaviors
weighted
I may have missed
some we can capture and discuss during today's
call.
... Harry
The Rate Ad Hoc (hence known as RAH) met and agreed to
discuss concerns and then plan how to continue. The following people expressed
the following concerns.
Necdet Uzun: No packet loss on ring; not preclude STB; not
complicate MAC design; high priority should be shaped to CBR; jitter can be
worsened by control packets; ring not owned/operated by one entity, can trust
all MACs, but not all clients
John Lemon:
STB (or small second buffer of DTB) doesn't compromise DTB on same
ring, such as effecting jitter sensitive traffic; reservation per link,
different allowed; reserved traffic jitter bounded by N MTU; topology
negotiated secondary buffer size determining ramp up of low pri traffic; loss
< jitter < utilization; not constrained by 802 bridging, just support
superset of 802 bridging – dumb client sends all BE traffic
Harry Peng: STB design is not precluded; must interop, but
maybe at slightly reduced performance; separation of access jitter and transit
jitter; constrained by 802 bridging compliance, make sure we don't break
it
Luis Rovira: concerned about complexity; wants
simulation/calculation proof/certainty
Stein Gjessing: how do we specify what values are
advertised and how do we specify node's behavior to comply
Italo Busi: negotiate for priorities for loss, jitter,
utilization
Yiming Yao: allow customer to choose between loss, jitter,
and utilization
Anoop: should not preclude VDQ; should allow algorithm
other than ramp up/down
Other attendees: Tricia Hill, Vitorio
Mascolo, Yongdong Zhao, Rhett Brikovskis, Li Mo, Peter Jones.
Going forward:
- General interest
messages sent to reflector with titles starting with RAH
- Ad hoc bridge + face
to face (9:00 am PT, Tuesdays, starting 3/19), Necdet sets bridge
- Define priority,
reservation, reclamation, classes of service, etc and give usage
- Propose how to meet
all of above requirements
- Document
- Define scenarios to
evaluate against
- Simulate against
simulation reference model
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