You can use existing vds or create a new one, MTU has to be 1600 or higher. It will be used for your overlay network. I will use two port groups and two uplinks and make them active / standby.

High-level

  1. Create a new vds – ‘nsx-t’ with two uplinks
  2. Create two port groups – ‘pg-nsxt-1’ & ‘pg-nsxt-2’
  3. Add hosts to new vds – using vmnic 2 and 3 / uplink1 and 2 (using spare vmnic’s)
  4. Change port groups to VLAN Trunking.
  5. Change port groups to use explicit failover and active and standby uplinks. (‘pg-nsxt-1’ – active – uplink 1 / standby – uplink 2) (‘pg-nsxt-2’ – active – uplink 2 / standby – uplink 1)
  6. Change MTU for vds to 9000 (1600 or higher)

Implementation

Login to vCenter > Click your networking icon > right click your cluster > select distributed switch > Click new distributed switch

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Give your new switch a name ‘nsx-t’> Click next

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Click next

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Number of uplinks 2, give the first port group a name ‘pg-nsxt-1’ > click next

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Click finish

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Right on the new vds > click add and manage hosts

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Click Add hosts

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Select the hosts your want to add > click next

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Select the uplinks not in use > vmnic 2 and 3 for uplink1 and 2 > click next

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Click next

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Click next

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Click finish

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Right click your vds > select distributed port group > click new distributed port group

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Give your second port group a name  ‘pg-nsxt-2’ > click next

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Change to VLAN Trunking > click next

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Click finish

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Change your first port group you create to VLAN trunking as well by editing the setting of ‘pg-nsxt-1’ > select the VLAN tab

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Click teaming and failover > change load balancing to use explicit failover order > change failover order to uplink 1 as active and standby to uplink 2 for ‘pg-nsxt-1’ > click ok

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Change your second port group teaming and failover ‘pg-nsxt-2’ > load balancing use explicit failover order > failover order, active to uplink 2 and standby to uplink 1 > click ok

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Edit settings on your vds for ‘nsx-t’ > click advanced  tab > change MTU to 9000 (1600 or higer)

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By Kader