Qos Dbl - Cisco 4500M Command Reference Manual

qos dbl

qos dbl
To enable Dynamic Buffer Limiting (DBL) globally on the switch, use the qos dbl command. To disable
DBL, use the no form of this command.
Syntax Description
buffers
aggressive-flow
buffers
credits
credits
maximum
max
exceed-action
ecn
probability
percent
flow
include
layer4-ports
vlan
Defaults
The default settings are as follows:
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Command Modes
Global configuration
QoS policy-map class configuration
Catalyst4500 Series SwitchCiscoIOS Command Reference—Release 12.2(18)EW
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qos dbl [buffers {aggressive-flow buffers} | credits {aggressive-flow credits |
maximum max} | exceed-action {ecn | probability percent } |
flow {include [layer4-ports ] [vlan]}]
no qos dbl [buffers {aggressive-flow buffers} | credits {aggressive-flow credits |
maximum max} | exceed-action {ecn | probability percent } |
flow {include [layer4-ports ] [vlan]}]
(Optional) Specifies buffer limit for aggressive flows.
(Optional) Specifies aggressive flow.
(Optional) Number of buffers for aggressive flows; valid values are from 0 to 255.
(Optional) Specifies credit limit for aggressive flows and all flows.
(Optional) Number of credits for aggressive flows; valid values are from 0 to 15.
(Optional) Specifies maximum credit for all flows.
(Optional) Number of credits for all flows; valid values are from 0 to 15.
(Optional) Specifies packet marking when limits are exceeded.
(Optional) Specifies explicit congestion notification.
(Optional) Specifies probability of packet marking.
(Optional) Probability number; valid values are from 0 to 100.
(Optional) Specifies flows for limiting.
(Optional) Allows Layer 4 ports and VLANs to be included in flows.
(Optional) Includes Layer 4 ports in flows.
(Optional) Includes VLANs in flows.
QoS DBL is disabled.
Aggressive-flow buffers is set to 2.
Aggressive-flow credits is set to 2.
Layer 4 ports are included.
VLANs are included.
15 maximum credits are allowed.
15% drop probability is set.
Chapter2 Cisco IOS Commands for the Catalyst 4500 Series Switches
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