Chnoili
Enthusiast
Enthusiast

T0 interface ip adressing

Hi

I am not shure, how i have to adress the interfaces of the T0 gateway and place the edge nodes to get a connection from my client to my servers. It is all in a nested environment with no physical uplinks.

At the moment all uplinks of the edge nodes are connected to the vswitch (Admin) where all admin/esx management is placed, incl. the client. The edge nodes/cluster has two switches configured, one with the overlay tz and one with the vlan tz. Both of the uplinks are connected to the vSwitch Admin portgroup.

See the enivronment on the pictureenvironment.PNG

For me at the moment it is not clear, how to adress the interfaces of the t0 gateway and the bgp neighbors.

Any help or ideas? Thank you

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Sreec
VMware Employee
VMware Employee

If your ask is how to establish BGP with existing T0 , as per your topology you have two Uplinks (unsure if they are in the same VLAN or different VLAN) . Either you can have a unique VLAN for each T0 interface or keep a common VLAN and assign the IP accordingly.  The next task would be to ensure T0 can reach the upstream router which is configured with BGP. As long as we have a Point to Point connectivity with BGP peer address IP neighbour ship should be UP. 

.Kindly refer https://docs.vmware.com/en/VMware-NSX-T-Data-Center/3.1/administration/GUID-4BC07C6A-DC62-496B-A6A9-...
Cheers,
Sree | CKA|CKAD|VCIX-3X| VCAP-4X| VExpert 5x
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CyberNils
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Enthusiast

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Chnoili
Enthusiast
Enthusiast

Hi Sree

Thanks for your input. Maybe my explanation was not clear. There is no upstream router. There is just a VM connected to "standard" portgroup / switch and i want to connect my "nsx world" with my world which is not in the nsx world - because it is a nested environment, the rest of the world is just connected to a switch (no router).

t1t0.PNG

Maybe this makes my question a little bit more clear?

Thanks you!

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Sreec
VMware Employee
VMware Employee

Appreciate for providing the clarity. Ensure Hosts are connected to VDS and Edges can be connected to VSS/VDS . In this example, you have connected Edge uplinks directly to VSS portgroup which is fine. VM client gateway will be on T0 edge(Single Edge) and Overlay tenants will have their gateway on T1 router.

Cheers,
Sree | CKA|CKAD|VCIX-3X| VCAP-4X| VExpert 5x
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mauricioamorim
VMware Employee
VMware Employee

First of all it would be nice to understand how you prepared your edge VMs. It is a little tricky, as the VMs theirselves have an N-VDS inside them and the N-VDS uplinks are the VMs vNICs connected to the host vSwitch (Admin).

The simplest way to achieve what you want is to directly connect a T0 uplink to your Admin Network and give it an address on 192.168.10.0/24 network. Since you probably have not configured any VLAN tagging here, to do this you have to create a segment in the VLAN TZ that your Edge has (this is why the Edge config is important) and use tag 0 (zero). Then create an uplink interface on the T0, connect it to this segment and give it an address on the 192.168.10.0/24 network. To finish the T0 configuration just configure a default route to the default gateway on that network.

To enable you client to reach the overlay segments it needs a route to the 172.16 networks pointing to the T0 uplink.

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