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Configuring Queuing and Flow Control
Step 5
Step 6
Step 7
This example shows how to configure the no-drop buffer threshold for the Cisco Nexus device for 3000
meters.
switch(config-pmap-nq)# policy-map type network-qos nqos_policy
switch(config-pmap-nq)# class type network-qos nqos_class
switch(config-pmap-nq-c)# pause no-drop buffer-size 152000 pause-threshold 103360
resume-threshold 83520
switch(config-pmap-nq-c)# exit
switch(config-pmap-nq)# exit
switch(config)# exit
switch#
Configuring the Buffer Threshold for the Cisco Nexus 2148T Fabric Extender
In the Fabric Extender configuration mode, you can configure the buffer threshold for the Cisco Nexus 2148T
Fabric Extender. The buffer threshold sets the consumption level of input buffers before an indication is sent
to the egress queue to start observing the tail drop threshold. If the buffer usage is lower than the configured
buffer threshold, the tail drop threshold is ignored.
Procedure
Step 1
OL-26657-01
Command or Action
switch(config-pmap-nq-c)# no
pause no-drop buffer-size
buffer-size pause-threshold
xoff-size resume-threshold
xon-size
switch(config-pmap-nq-c)# exit
switch(config-pmap-nq)# exit
Command or Action
switch# configure terminal
Cisco Nexus 5000 NX-OS Quality of Service Configuration Guide, Release 5.1(3)N2(1)
Configuring the Buffer Threshold for the Cisco Nexus 2148T Fabric Extender
Purpose
• resume-threshold—Specifies the buffer limit at which
the port resumes the peer.
• xon-size—Buffer limit at which to resume, in bytes. Valid
values are 0 to 490880.
On a Cisco Nexus 5020 switch, you can
Note
configure a maximum resume-threshold value
of 38400 bytes.
On a Cisco Nexus 5500 Series device, you can
configure a maximum resume-threshold value
of 83520 bytes.
(Optional)
Removes the buffer threshold settings for pause and resume
for 3000m lossless Ethernet.
Exits class mode.
Exits policy-map network-qos mode.
Purpose
Enters global configuration mode.
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