Cisco Nexus 5000 Series Switch CLI Software Configuration Guide (OL-16597-01, July 2009)

PurposeCommand or Action
Associates a class map with the policy map, and enters
configuration mode for the specified system class.
switch(config-pmap-nq)# class
type network-qos class-name
Step 3
The associated class map must be the same type as
the policy map type.
Note
Specifies the MTU value in bytes.switch(config-pmap-c-nq)# mtu
mtu-value
Step 4
The mtu-value that you configure must be less than
the value set by the system jumbomtu command.
Note
(Optional)
Resets the MTU value in this class.
switch(config-pmap-c-nq)# no
mtu
Step 5
Enables multicast optimization. Multicast traffic in this class
will be served by all available multicast queues.
switch(config-pmap-c-nq)#
multicast-optimize
Step 6
Only one class in a policy map can be configured
for multicast optimization.
Note
(Optional)
Disables multicast optimization.
switch(config-pmap-c-nq)# no
multicast-optimize
Step 7
Configures a no-drop class. If you do not specify this
command, the default policy is drop.
switch(config-pmap-c)# pause
no-drop [pfc-cos pfc-cos-value]
Step 8
The operation for the drop policy is a simple tail
drop, where arriving packets will be dropped if the
queue increases to its allocated size.
Note
The pfc-cos-value range is from 0 to 7. This option is
supported only for for a ACL-based system class (which
filters traffic using criteria other than cos-based matches).
The list of CoS values can potentially include the
CoS value that is used for FCoE traffic in
class-fcoe. You must determine if this is desired
behavior for your topology.
Caution
(Optional)
Removes the no-drop option from this class.
switch(config-pmap-c-nq)# no
pause no-drop
Step 9
Specifies the tail drop threshold on this interface. The
threshold range is from 20480 to 204800 bytes.
switch(config-pmap-c-nq)#
queue-limit number-bytes bytes
Step 10
The queue limit can only be configured on drop
classes. If you try to configure a queue limit on a
no-drop class, or try to configure no-drop on a class
where a queue limit is already defined, the CLI will
return an error.
Note
(Optional)
Disables the queue limit specification in this class.
switch(config-pmap-c-nq)# no
queue-limit number-bytes bytes
Step 11
Specifies a 802.1Q CoS value which is used to mark packets
on this interface. The value range is from 0 to 7.
switch(config-pmap-c-nq)# set cos
cos-value
Step 12
Cisco Nexus 5000 Series Switch CLI Software Configuration Guide
OL-16597-01 439
Configuring System Classes
Configuring Type Network QoS Policies