Enabling Egress Qos (Ipv4) - Cisco Nexus 9000 Series Configuration Manual

Configuring QoS TCAM Carving
DETAILED STEPS
Command or Action
Step 1
hardware access-list tcam region region
tcam-size
Step 2 hardware access-list tcam region region
tcam-size
This example sets the FEX QoS (IPv4) TCAM size to 256. A FEX QoS (IPv4) of size 256 takes 512 entries
because QoS TCAM is double wide.
• Reduce the IPv4 FEX IFACL region by 512 entries and add a FEX QoS (IPv4) region with 512 entries.

Enabling Egress QoS (IPv4)

To enable QoS (IPv4) TCAM, you must decrease the TCAM size of another region and then increase the
TCAM size to enable the newQoS (IPv4) TCAM region.
Egress marking and policing are supported on all platforms. Egress classification for egress packet
Note
scheduling is supported only on 100G platforms.
Beginning in 7.0(3)I1(2), to enable egress QoS (IPv4), you must decrease the TCAM size of the e-racl region
and then increase the TCAM size for the egress QoS (IPv4) region.
The following are considerations for egress QoS (IPv4) and TCAM regions:
• Egress QoS TCAM is based on packet type, such as e-qos. TCAM carving is needed to match IPv4
• All egress QoS (IPv4, IPv6, and MAC) TCAM regions are double-wide, except for the e-qos-lite region
• Violated and non-violated statistics are supported for policing action when a double-wide TCAM is
• Violated statistics are not supported for policing action only when the single-wide TCAM (e-qos-lite)
Purpose
To enable carving your FEX QoS (IPv4) TCAM region, specify another
region to free up resources. Also specify the reduced TCAM size for the
region.
Note
Carve the new FEX QoS (IPv4) TCAM region including the TCAM size
(number of double wide entries).
switch(config)# hardware access-list tcam region fex-ifacl 0
Warning: Please reload the linecard for the configuration to take effect
switch(config)# hardware access-list tcam region fex-qos 256
Warning: Please reload the linecard for the configuration to take effect
packets on VLAN, layer 2, and layer 3 port types.
which is single-wide.
configured.
is configured.
Cisco Nexus 9000 Series NX-OS Quality of Service Configuration Guide, Release 7.x
Repeat this step for as many regions as necessary to free up
sufficient resources to carve the new FEX QoS (IPv4) TCAM
region.
Enabling Egress QoS (IPv4)
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