Guidelines And Limitations - Cisco Nexus 9000 Series Configuration Manual

Guidelines and Limitations

Table 16: QoS TCAM Lite Regions
Feature
Layer 3 QoS
Port QoS
VLAN QoS
FEX QoS
Cisco Nexus 9200 Series switches do not support QoS TCAM lite regions.
Note
The region is applicable only for ALE enabled devices and are required for classification policies applied
Note
on 40G uplink ports.
You need to save the configuration and reload the system for the region configuration to become effective.
Note Either the regular version or the lite version of the QOS TCAM can be enabled. Both cannot be enabled
at the same time. For example, either the IPv4 Port QoS or the IPv4 Port QoS lite version can be enabled
at any one time.
Guidelines and Limitations
TCAM region sizes have the following configuration guidelines and limitations:
• show commands with the internal keyword are not supported.
• After TCAM carving, you must save the configuration and reload the switch.
• Cisco Nexus 9200 Series switches and Cisco Nexus 9300-EX Series switches are of the same type and
• By default, all IPv6 TCAMs are disabled (the TCAM size is set to 0).
• Use the show hardware access-list tcam region command to view the configured TCAM region size.
• Beginning with Cisco NX-OS Release 7.0(3)I5(2), the global CLI hardware qos classify ns-only
Cisco Nexus 9000 Series NX-OS Quality of Service Configuration Guide, Release 7.x
42
therefore, they have the same TCAM regions.
command is introduced to enable configuration of the QoS policy on the NS ports without carving the
T2 QoS region, for example, qos and l3-qos regions. This command removes the TCAM restrictions
Purpose
QoS policy applied on Layer 3
interfaces.
QoS policy applied on Layer 2
interfaces.
QoS policy applied on VLAN.
QoS policy applied on FEX
interfaces.
Configuring QoS TCAM Carving
Region Name
IPV4: l3qos-lite
IPV4: qos-lite
IPV4: vqos-lite
IPV4: fex-qos-lite