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Policy-Map Commands
12-96 Configuring Quality of Service
Syntax of the “no” Form
The
no
form
of
this
command
sets
the
constant
to
the
default
value
of
9:
no random-detect exponential-weighting-constant
Mode
Policy
‐
Map
Class
configuration:
XSR(config-pmap-c-<
xx>
)#
Example
The
following
example
enables
WRED
and
sets
the
weight
constant
to
(1/2)^5
:
XSR(config)#policy-map wred
XSR(config-pmap<wred>)#class a
XSR(config-pmap-c<a>)#random-detect dscp-based
XSR(config-pmap-c<a>)#random-detect exponential-weighting-constant 5
random-detect precedence
This
command
sets
Weighted
Random
Early
Detect
(WRED)
the
minimum
and
maximum
threshold
and
maximum
drop
probability
values
for
a
IP
precedence
value.
The
default
WRED
maximum
drop
probability
(
MaxP
)
is
1/10
and
the
default
maximum
threshold
(
MaxTh
)
is
40
for
all
IP
precedence
values.
The
default
minimum
threshold
is
calculated
from
MaxTh
based
on
following
formula:
MinTh
=
(1/2
‐
precvalue/16)
x
MaxTh
To
change
the
default
setting,
use
the
random-detect precedence default
command.
By
doing
so,
all
IP
precedence
will
share
the
same
values
except
those
which
were
explicitly
configured
with
random-detect precedence
.
This
setting
is
useful
if
WRED
should
operate
as
RED.
To
revert
to
the
original
default
setting,
enter
no random-detect precedence default
.
Syntax
random-detect precedence
prec-value min-thres max-thres
[
mark-prob
]default
Syntax of the “no” Form
The
no
form
of
this
command
reverts
WRED
parameters
to
the
default
for
a
precedence
value:
no random-detect precedence
prec-value
prec-value
Precedence
value,
ranging
from
0
to
7
with
the
keyword
default
.
min-thres
Minimum
number
of
packets
in
the
queue,
ranging
from
1
to
4096,
beyond
which
the
XSR
randomly
drops
packets.
max-thres
Maximum
number
of
packets
in
the
queue,
ranging
from
1
to
4096,
beyond
which
the
XSR
drops
all
packets.
mark-prob
Mark
probability
denominator.
Liklihood
of
queued
packets
to
be
dropped
when
their
number
exceeding
the
minimum
limit
is
between
0
and
(1/mark
‐
prob).
Range:
1
to
65,536.
Содержание X-Pedition XSR
Страница 1: ...X Pedition Security Router XSR CLI Reference Guide Version 7 6 P N 9033842 07...
Страница 2: ......
Страница 10: ...viii...
Страница 14: ...xii...
Страница 134: ...Bootrom Monitor Mode Commands 3 128 Configuring the XSR Platform...
Страница 278: ...VRRP Clear and Show Commands 5 202 Configuring the Internet Protocol...
Страница 352: ...IGMP Clear and Show Commands 7 104 Configuring IP Multicast...
Страница 406: ...Multilink Show Commands 8 136 Configuring the Point to Point Protocol...
Страница 436: ...Frame Relay Clear and Show Commands 9 112 Configuring Frame Relay...
Страница 460: ...Dialer Watch Commands 10 106 Configuring the Dialer Interface...