Configuring The Queue Limit At The Global Level - Cisco Nexus 6000 Series Configuration Manual

Configuring the Fabric Extender

Configuring the Queue Limit at the Global Level

The following are guidelines for the configuration of the queue limit:
• The tx queue limit specifies the buffer size used for each queue in the egress (n2h) direction.
• The rx queue limit specifies the buffer size used for each port in the ingress (h2n) direction.
• You can adjust the ingress queue limit when the FEX uplink experiences temporary congestion.
• You can adjust the egress queue limit for improved burst absorption or in a situation where there is a
• When you disable the tx queue limit, any output port is able to use the entire shared buffer.
Procedure
Step 1
Step 2
Step 3
This example shows how to configure the queue limit.
switch# configure terminal
switch(config)# fex 100
switch(config-fex)# hardware N2248TP-E queue-limit 83000 tx
switch(config-fex)#
many to one traffic pattern.
Command or Action
configure terminal
Example:
switch# configure terminal
switch(config)#
fex chassis_id
Example:
switch(config)# fex 100
switch(config)#
hardware N2248TP-E queue-limit
queue-limit tx|rx
Example:
switch(config-fex)# hardware
N2248TP-E queue-limit 83000 tx
Cisco Nexus 6000 Series NX-OS Layer 2 Switching Configuration Guide, Release 7.x
Configuring the Queue Limit at the Global Level
Purpose
Enters global configuration mode.
Enters configuration mode for the specified FEX.
The range of the chassis_id value is 100 to 199.
Controls the egress (tx) or ingress (rx) queue tail drop
threshold level on a FEX.
• The default queue limit for tx (egress) is 4 MB.
Note The hardware N2248TP-E queue-limit
command specifies the default tx queue
limit.
• The default queue-limit for rx (ingress) is 1 MB.
The hardware N2248TP-E queue-limit
Note
rx command specifies the default rx queue
limit.
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