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Configuring QoS on the System
• Enter the system jumbomtu command to define the upper bound of any MTU in the system. The system
• The system class MTU sets the MTU for all packets in the class. The system class MTU cannot be
• The FCoE system class (for Fibre Channel and FCoE traffic) has a default MTU of 2158 bytes. This
• The switch sends the MTU configuration to network adapters that support DCBX.
Configuring System QoS
Attaching the System Service Policy
The service-policy command specifies the system class policy map as the service policy for the system.
Procedure
Step 1
Step 2
Step 3
OL-26657-01
jumbo MTU has a default value of 9216 bytes. The minimum MTU is 2158 bytes and the maximum
MTU is 9216 bytes.
configured larger than the global jumbo MTU.
value cannot be modified.
MTU is not supported in Converged Enhanced Ethernet (CEE) mode for DCBX.
Note
Command or Action
switch# configure terminal
switch(config)# system qos
switch(config-sys-qos)#
service-policy type
{network-qos | qos | queuing}
[input | output] policy-name
Cisco Nexus 5000 NX-OS Quality of Service Configuration Guide, Release 5.1(3)N2(1)
Purpose
Enters global configuration mode.
Enters system class configuration mode.
Specifies the policy map to use as the service policy for the system.
There are three policy-map configuration modes:
• network-qos—Network-wide (system qos) mode.
• qos—Classification mode (system qos input or interface input
only).
• queuing—Queuing mode (input and output at system qos and
interface).
There is no default policy-map configuration mode; you
Note
must specify the type. The input keyword specifies that
this policy map should be applied to traffic received on an
interface. The output keyword specifies that this
policy-map should be applied to traffic transmitted from
an interface. You can only apply input to a qos policy;
you can apply both input and output to a queuing policy.
Configuring System QoS
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