3Com MSR 50 Series Configuration Manual page 1666

1666 C 86: C
HAPTER ONGESTION
n
n
M
ANAGEMENT
To do...
Define a traffic
behavior and enter
traffic behavior view
Configure the drop
type to be random
drop
Display traffic
behavior information
The wred [ dscp | ip-precedence ] command can be used only after the
■
queue af or queue wfq command have been configured. The wred and
queue-length are mutually exclusive.
Other configurations under the random drop will be deleted when WRED is
■
deleted.
When a QoS policy included WRED is applied on an interface, the original
■
WRED configuration on interface will be ineffective.
6 Configuring exponent for calculating average queue length by WRED
Follow these steps to configure exponent for calculating average queue length by
WRED:
To do...
Enter system view
Define a traffic behavior and
enter traffic behavior view
Configure exponent for
calculating average queue
length by WRED
Display traffic behavior
information
The wred weighting-constant command is available only after the queue af
command or the queue wfq command has been configured and the wred
command has been used to enable WRED.
7 Configuring DSCP lower-limit, upper-limit and discard probability of WRED
The DSCP based WRED drop type has been enabled via the wred dscp command.
Use the command...
traffic behavior
behavior-name
wred [ dscp |
ip-precedence ]
display traffic behavior
{ system-defined |
user-defined }
[ behavior-name ]
Use the command...
system-view
traffic behavior
behavior-name
wred weighting-constant
exponent
display traffic behavior
{ system-defined |
user-defined }
[ behavior-name ]
Remarks
Required
behavior-name: Name of the traffic
behavior. It is not allowed to
pre-define traffic behavior for the
system.
Required
dscp: Uses DSCP value for calculating
drop probability for a packet.
ip-precedence indicates that the IP
precedence value is used to calculate
drop probability for a packet, which is
the default setting.
Optional
The display command can be
executed in any view.
Remarks
-
Required
behavior-name: Name of the
traffic behavior. It is not
allowed to pre-define traffic
behavior for the system.
Required
9 by default.
Optional
The display command can be
executed in any view.