© 2004 Cisco Systems, Inc. All rights reserved. Printed in USA.
Presentation_ID.scr
121121121
© 2004 Cisco Systems, Inc. All rights reserved.
RST-3508
9805_05_2004_c2
Enabling QoS and DBL
on Cisco IOS Supervisors
Cat4500(config)#qos
Cat4500(config)#qos dbl
Cat4500# show qos dbl
DBL is enabled globally
DBL flow includes vlan
DBL flow includes layer4-ports
DBL does not use ecn to indicate congestion
DBL exceed-action probability: 15%
DBL max credits: 15
DBL aggressive credit limit: 10 // NAF
threshold
DBL aggressive buffer limit: 2 packets // NAF’s
are limited
The Information Is Applied per Port per Queue
122122122
© 2004 Cisco Systems, Inc. All rights reserved.
RST-3508
9805_05_2004_c2
C4506# show policy
Policy Map LAB-POLICY
class FTP
set ip dscp 0
dbl
class UDP
set ip dscp 0
dbl
class WEB
set ip dscp 16
class TELNET
set ip dscp 48
C4506(config)# policy-map LAB-POLICY
C4506(config-pmap)# class UDP
C4506(config-pmap-c)# dbl
C4506(config-pmap)# class FTP
C4506(config-pmap-c)# dbl
Dynamic Buffer Limiting…Activated
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