NSX-T – Deploying Tier-0 (T0) Router

Updated by

One of the things I like about NSX-T is the ability to deploy Tier-1 and Tier-0 routers. The T0 is the gateway that bridges the virtual world to the physical world.

Below you will find a screenshot of the logical architecture followed by a step by step process to deploy a T0 router in your NSX-T environment.

Screenshot of the architecture and where the Tier-0 router sits:

Topology diagram showing the Tier-0 logical router between a VLAN-backed switch and Tier-1 routers through an NSX Edge.

Networking>Tier-0 Gateways.
Add Tier-0 Gateway

Tier-0 gateway editor requesting the gateway name, HA mode, edge cluster, and tags.

We need to provide the T0 router a name and HA mode.

Tier-0 gateway configuration showing TO-LR-01 in Active-Active mode on Edge-Cluster01.
Select which Edge Cluster you have already created
NSX-T confirmation that the TO-LR-01 Tier-0 gateway was submitted successfully.
Yes
TO-LR-01 Tier-0 gateway editor after creation with route redistribution and interface sections available.
Next, select set next Route Re-Distribution
Tier-0 route-source selector for static routes, connected interfaces and segments, and advertised Tier-1 subnets.
For the sake of T0 deployment, Static Routes is typically enough. Advertised T1 subnets are for your segments you are attaching.
TO-LR-01 gateway configuration after route redistribution sources are selected and before interfaces are added.
Select Set next to Interfaces
Set Interfaces dialog for TO-LR-01 before an external interface is added.
Add interface
Tier-0 interface form requesting the interface name, IP mask, connected segment, MTU, and edge node.
You need to provide the interface a name, IP, and select which edge node
TO-LR-01 gateway editor showing the BGP section where the local AS and neighbor settings are configured.
You are going to want to enter in your AS and keep everything default before clicking on next for BGP Neighbors
Set BGP Neighbours dialog for TO-LR-01 before any external peer is added.
Tier-0 BGP-neighbor editor with peer IP, BFD, remote AS, filters, timers, password, and enablement controls.
Tier-0 Gateways inventory showing TO-LR-01 in Active-Active mode with the configured edge cluster.

Once you have saved your BGP Neighbors information you are good to save changes on your T0 router.

Summary:
I know a lot of people hear deploying a Tier-0 router and making a BGP connection with the external network sounds scary but as you can see it is easy. Next we will need to connect our Tier-1 routers up to our newly created Tier-0 router.

Continue reading

NSX-T – Attach a Tier-1 Gateway to Tier-0 Gateway

Explore another guide in this topic and build on what you have just read. Read the article

Leave a Reply

Discover more from Digital Thought Disruption

Subscribe now to keep reading and get access to the full archive.

Continue reading