Regarding the VLAN ID for VXLAN VTEP

[Dongjianhua]

Hi,

I have a question. Why the VLAN ID for VXLAN VTEP must be the same in NSX.Please see the attachments.

[ajaynwops]

This seems to be a Typo.

[Dongjianhua]

Thanks ajaynwopsajaynwops. But the second attached picture indicate that it is not a typo.

[bayupw · Accepted solution]

VTEP configuration varies based on the underlying network topology, L2 or L3.

VTEP subnet will same for L2 network fabric and will differs per ToR for L3 network fabric.

Your attachment is L2, in NSX setup (based on design guide) your VDS spans across PODs, Cluster in POD A and POD B will be sharing a single VDS.

Therefore, the VLAN ID for the VDS uplink that will be used for VXLAN need to be the same but subnet/IP Address is different across POD.

For more explanations, you can watch the VMworld video in below links, the speaker explains about this VLAN ID spanning across PODs on minute 25:54

VMworld 2016 USA NET7857R Reference Design for SDDC with NSX and vSphere Part 1 001 - YouTube