NSX-T 2.5: Add a Tier-0 Gateway and configure bgp

the Tier-0 gateway provides N-S connectivity and connects to the physical routers. The Tier-0 gateway could use static routing or BGP to connect to the physical routers. The Tier-1 gateway cannot connect to physical routers directly; it has to connect to a Tier-0 gateway to provide N-S connectivity to the subnets attached to it.

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  • A DR component for the Tier-0 Gateway is instantiated on all Transport Nodes when a T1-Gateway is connected to it.
  • An SR component for the Tier-0 Gateway is instantiated on the Edge Nodes when Physical routing, DNAT, Edge firewall services are configured.
  • Auto Plumbing of T1 SR to T0 DR is done by “Inter-Tier” LS/Segment (VNI 65549) using 100.64 subnet (reserved)
  • Auto Plumbing of DR to SR is done by “Transit Segment” LS/Segment (VNI 69639) using 169.254 subnet (reserved)

Follow the steps below to create T1 Gateway.

1 – Select Networking > Tier 1 Gateways > ADD TIER-0 GATEWAY.

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2 – Type a name for Tier-0 Gateway, select the HA mode that you choose, select the egde cluster and Click save.

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3 – Click “Yes” to continue configuring the Tier-0 Gateway.

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4 – Click interfaces and set.

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5 – Click add interface and then configure the uplink.

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6 – Validate the status.

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7 – Click BGP, set the AS Local number 65111 and click save.

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8 –  Click BGP neighbors.

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9 – And then configure the neighbors.

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10 – Validate the status and click close.

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11 – Finally validate the status of Tier-0 Gateway.

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Hoping you have enjoyed this post, see you next time.

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