Setting Ingress Port Cos; Modifying Class Maps - Cisco Nexus 7000 Series Configuration Manual

Configuring Queuing and Scheduling on M-Series I/O Modules
Table 32: System-Defined Queuing Class Maps with Default DSCP Values
Class Map Queue Name
8q2t-in-q1
8q2t-in-q2
8q2t-in-q3
8q2t-in-q4
8q2t-in-q5
8q2t-in-q6
8q2t-in-q7
8q2t-in-q-default

Setting Ingress Port CoS

You can set the CoS field in all ingress packets for untrusted ports. By default, ports are trusted and the CoS
field is not modified. You can use this method to configure the port state to trusted or untrusted.
For information about configuring ingress port CoS, see the "Configuring Ingress Port CoS" section.

Modifying Class Maps

You can modify the CoS values that are matched by system-defined queuing class maps, which modify the
CoS-to-queue mapping.
system-defined CoS values. Each CoS value appears only once in the queues of the same type.
If you want to change the system-default queuing class maps, you must also change the queuing policies
applied on the interfaces because any changes in the queuing class maps causes traffic disruptions and might
also cause packet drops.
Caution
When you modify a system-defined queuing class map, the changes occur immediately and it might disrupt
traffic on all virtual device contexts (VDCs).
Note
For traffic crossing Layer 3, the queue mapping CoS-to-queue occurs automatically.
For information about configuring class maps, see the "Modifying Queuing Class Maps for COS" section.
Note
Starting from Cisco NX-OS Release 6.2(2), DSCP-to-queue mapping on ingress class maps is supported on
M Series 10G modules. However, the DSCP-to-queue mapping on all egress class maps is not supported.
Description
Ingress queue 1 of type 8q2t
Ingress queue 2 of type 8q2t
Ingress queue 3 of type 8q2t
Ingress queue 4 of type 8q2t
Ingress queue 5 of type 8q2t
Ingress queue 6 of type 8q2t
Ingress queue 7 of type 8q2t
Ingress default queue of type 8q2t
Table 6: System-Defined Type queuing Class Maps, on page 15
Cisco Nexus 7000 Series NX-OS Quality of Service Configuration Guide
Setting Ingress Port CoS
Default DSCP Value
40-63
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—
—
—
—
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0-39
lists the default
91