Purpose
Command or Action
Associates a class map with the policy map, and enters
configuration mode for the specified system class.
The associated class map must be the same type as the
policy map type.
Note
switch(config-pmap-nq)#
class
type network-qos class-name
Step 11
Sets the MTU to 2158 bytes in the policy map for class-fcoe.
switch(config-pmap-c-nq)#
mtu 2158
Step 12
Configures a no-drop class. If you do not specify this command,
the default policy is drop.
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.
The pfc-cos-value range is from 0 to 7. This option is
supported only for a ACL-based system class (which
filters traffic using criteria other than cos-based
matches).
Note
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
switch(config-pmap-c-nq)#
pause no-drop
[
pfc-cos
pfc-cos-value
]
Step 13
Associates the default system class (class-default) with the policy
map, and enters configuration mode for the specified system
class.
The associated class map must be the same type as the
policy map type.
Note
switch(config-pmap-nq)#
class
type network-qos class-name
Step 14
Enables the jumbo MTU for the whole switch by setting the MTU
to its maximum size (9216 bytes) in the policy map for the default
system class (class-default).
switch(config-pmap-c-nq)#
mtu 9216
Step 15
This example shows how to configure a no-drop policy map.
switch#
configure terminal
switch(config)#
class-map type network-qos c1
switch(config-cmap-nq)#
match qos-group 2
switch(config-cmap-nq)#
exit
switch(config)#
class-map type network-qos class-fcoe
switch(config-cmap-nq)#
match qos-group 1
switch(config-cmap-nq)#
exit
switch(config)#
policy-map type network-qos p1
switch(config-pmap-nq)#
class type network-qos c1
switch(config-pmap-c-nq)#
pause no-drop
switch(config-pmap-nq)#
class type network-qos class-fcoe
switch(config-pmap-c-nq)#
mtu 2158
switch(config-pmap-c-nq)#
pause no-drop
switch(config-pmap-nq)#
class type network-qos class-default
switch(config-pmap-c-nq)#
mtu 9216
Cisco Nexus 5500 Series NX-OS SAN Switching Configuration Guide, Release 7.x
OL-30895-01
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Configuring iSCSI TLV
Configuring No-Drop Policy Maps
