system vlan nve-overlay id

[shados]

Hi, I found this command in the official Cisco configuration guide for vxlan.  

system vlan nve-overlay id

• For scale environments, the VLAN IDs related to the VRF and Layer-3 VNI (L3VNI) must be reserved with the system vlan nve-overlay id command.

However, I have never used it and everything seems to be working without it just fine (l3vni(routing) l2vni(bridging), and IRB overall)

It says this should be configured in scale environments, does this mean that this command is purely cosmetic to avoid potential misconfigs and duplicates and is optional to use?

[AshSe]

Hi @shados 

The system vlan nve-overlay id command is not purely cosmetic. It is a best practice for scale environments to avoid potential VLAN ID conflicts and ensure operational consistency. However, in smaller or simpler environments, it is optional as long as you carefully manage VLAN ID assignments and avoid conflicts manually. If you anticipate your environment growing or becoming more complex, it would be wise to start using this command proactively.

Hope This Helps!!!

AshSe

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[Pavel Tarakanov]

You can find this command in configuration guide only for NX-OS 7.x train:

https://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus9000/sw/7-x/vxlan/configuration/guide/b_Cisco_Nexus_9000_Series_NX-OS_VXLAN_Configuration_Guide_7x/b_Cisco_Nexus_9000_Series_NX-OS_VXLAN_Configuration_Guide_7x_chapter_0100.html

This is required to optimize the VXLAN resource allocation to scale the following platforms:

• Cisco Nexus 9200 platform switches beginning with the Cisco NX-OS Release 7.0(3)I1(2) through 7.0(3)I5(2)

• Cisco Nexus 9300-EX, 9300-FX, and 9300-FX2 platforms switches beginning with the Cisco NX-OS Release 7.0(3)I1(2) through 7.0(3)I5(2)

• Cisco Nexus 9300 platforms switches beginning with the Cisco NX-OS Release 7.0(3)I1(2)

• Cisco Nexus 9500 platforms switches with -EX and -FX line cards.

I believe in next releases there is no need in this command and it was hidden/removed.