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Cisco 10000 Series Router Quality of Service Configuration Guide
OL-7433-09
Chapter 11 Managing Packet Queue Congestion
Verifying and Monitoring Layer 3 Packet Dropping
Router(config-pmap)#
class class1
Router(config-pmap-c)#
random-detect atm-clp-based
Router(config-pmap-c)#
random-detect clp 1 12 25 10
Router(config-pmap-c)#
exit
Router(config-pmap)#
exit
Verifying and Monitoring Layer 3 Packet Dropping
For releases prior to Cisco IOS Release 12.0(25)SX and Release 12.3(7)XI, the router maintains only
the total random and tail drop statistics for all IP precedence levels.
In Cisco IOS Release 12.0(25)SX and Release 12.3(7)XI, and later releases, the router maintains
separate WRED drop statistics for each IP precedence, DSCP, and discard-class value.
The router collects the following statistical information:
•
Current average queue length
•
Per-precedence random and maximum threshold packets and bytes dropped
To verify and monitor packet dropping, use any of the following commands in privileged EXEC mode:
Command
Purpose
Router#
show interface
type
slot
/
module
/
port.subinterface
Displays configuration information about the interface you
specify, including the current queue limit.
Router#
show policy-map
policy-map-name
Displays configuration information about the policy map you
specify.
In Cisco IOS Release 12.3(7)XI and later releases, this command
shows WRED drop counts for each IP precedence, DSCP value,
and discard class.
In all releases prior to Cisco IOS Release 12.3(7)XI, this
command shows drop counts for each class.
Router#
show policy-map interface
Displays the configuration of classes configured for service
policies on all interfaces.
Router#
show pxf cpu queue interface
Displays the queuing statistics of an interface or VC.
