Cisco Nexus 9000 Routing Limitations

This is a memo and reminder about the routing limitations that I stumbled into when working with Nexus 9000 series switches running NX-OS.

FeatureLimitationLink to documentation
PBRYou cannot configure PBR on port-channel subinterfacesInterfaces configuration guide for 9.3(x)
QoSYou cannot configure QoS on port-channel subinterfacesQoS configuration guide for 9.3(x)
QoSYou cannot configure egress QoS on Ethernet subinterfacesQoS configuration guide for 9.3(x)

For example, when I wanted to police the traffic outbound to an external connection, routed on an Ethernet subinterface, I couldn’t do that. And since I had the upstream link as a layer 3 port-channel with subinterfaces, I couldn’t do the policing there (inbound) either.

At the time of this writing (21-Feb-2021) the recommended NX-OS release for Nexus 9000 series switches is 7.0(3)I7(9). It has additional limitation:

FeatureLimitationLink to documentation
SubinterfacesThere is no statistics available for subinterfaces on NX-OS 7.x (it works starting from 9.3(3) with some limitations: 9.3(x))Interfaces configuration guide for 7.x

Links for Cisco Nexus 9000 series switches:

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