Solutions
Provider
for
FTTx,
RFoG
and
HFC
www.ascentcomtec.com
Page
29
of
114
shows
the
port
priority
list.
802.1P
Enable
or
disable
802.1P.
Port
‐
based
Priority
There
are
8
priorities
(0~7)
corresponding
to
802.1P
priority.
DSCP
Enable
or
disable
DSCP.
8.2
Scheduling
Mechanism
This
page
sets
the
queue
scheduling
mechanism
as
strict
priority
or
Weighted
Round
‐
Robin
(8:4:2:1).
Strict
Priority
:
SP
queue
‐
scheduling
algorithm
is
specially
designed
for
critical
service
applications.
An
important
feature
of
critical
services
is
that
they
demand
preferential
service
in
congestion
in
order
to
reduce
the
response
delay.
Assume
that
there
are
eight
output
queues
on
the
port
and
the
preferential
queue
classifies
the
eight
output
queues
on
the
port
into
eight
classes,
which
are
queue7,
queue6,
queue5,
queue4,
queue3,
queue2,
queue1,
and
queue0.
Their
priorities
decrease
in
order.
In
queue
scheduling,
SP
sends
packets
in
the
queue
with
higher
priority
strictly
following
the
priority
order
from
high
to
low.
When
the
queue
with
higher
priority
is
empty,
packets
in
the
queue
with
lower
priority
are
sent.
You
can
put
critical
service
packets
into
the
queues
with
higher
priority
and
put
non
‐
critical
service
(such
as
e
‐
mail)
packets
into
the
queues
with
lower
