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Policy-Map Commands
XSR CLI Reference Guide 12-93
random-detect (WRED)
This
command
configures
and
enables
Weighted
Random
Early
Detect
(WRED)
for
the
class.
WRED
is
a
congestion
avoidance
mechanism
that
slows
traffic
by
randomly
dropping
packets
when
congestion
exists.
WRED
is
useful
with
protocols
like
TCP
that
respond
to
dropped
packets
by
decreasing
the
transmission
rate.
To
set
or
change
WRED
parameters,
use
the
random-detect
{
dscp
|
precedence
}
command.
If
no
parameter
passed
to
the
command,
the
default
is
prec
‐
based
WRED.
Syntax
random-detect
{
dscp-based
|
prec-based
}
Syntax of the “no” Form
The
no
form
of
this
command
disables
WRED
on
an
interface:
no random-detect
Mode
Policy
‐
Map
Class
configuration:
XSR(config-pmap-c-<
xx>
)#
Default
Prec
‐
based
Example
The
following
example
enables
WRED
as
DSCP
‐
based
with
the
default
values
for
parameters:
XSR(config)#policy-map DSCP
XSR(config-pmap<DSCP>)#class A
XSR(config-pmap-c<a>)#random-detect dscp-based
random-detect dscp
This
command
changes
the
Weighted
Random
Early
Detect
(WRED)
minimum
and
maximum
threshold
and
maximum
drop
probability
for
a
DiffServ
Code
Point
(DSCP)
value.
This
command
specifies
the
DiffServ
Code
Point
(DSCP)
value.
The
DSCP
can
be
a
number
from
0
to
63,
or
any
of
the
following
keywords:
af1,
af12
,
af13,
af21,
af22,
af23,
af31,
af32,
af33,
af41,
af42,
af43,
cs1,
cs2,
cs3,
cs4,
cs5,
cs6,
cs7,
ef
or
default.
Each
DSCP
value
has
initial
WRED
parameters.
Table
12
‐
1
provides
initial
parameter
settings
for
each
DSCP
value.
The
last
row
details
parameters
for
DSCP
values
not
shown
in
the
table.
dscp-based
WRED
uses
DSCP
values
when
calculating
drop
probability.
prec-based
WRED
uses
IP
precedence
values
when
calculating
drop
probability.
Note:
This command must be used in conjunction with the
random-detect
(interface) command.
Also,
random-detect dscp
is available only if you specified the dscp-based argument when
using the
random-detect
(interface) command.
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...