Working with Networks in Horizon

auto_allocated_network

Every Jetstream2 allocation is automatically provisioned with an auto_allocated_network. Most users can skip creating a network entirely and simply use auto_allocated_network for their instances.

Create a Network

1. Network

• You will need a network that Virtual Machines can use.

• If auto_allocated_network exists from Exosphere, you may wish to use that one and can skip ahead.
  -Otherwise-
  

• In the left menus, click on Project → Network → Network Topology → +Create Network

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2. Network name

• Enter a network name, for example, <username>_net.

• After giving it a descriptive name, press the blue NEXT button.

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3. Subnet

• Enter a subnet name, e.g. <username>_subnet, and
  a network address, e.g. 10.1.1.0/24, and
  a gateway address, e.g. 10.1.1.1.

  • This should be a non-routable subnet.
  • You can use 10.0.0.0 - 10.255.255.255, 172.16.0.0 - 172.31.255.255, 192.168.0.0 - 192.168.255.255.

• If you’re not sure what to choose, you can go with 10.1.1.0/24 → this will give you 255 available addresses in the 10.1.1.0 domain.

• If you choose 10.1.1.0/24 you can then set the gateway address to be 10.1.1.1

• After giving it a descriptive name, press the blue NEXT button.

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4. Create

• Click Create to create the new network.

  DHCP

  Do NOT uncheck the Enable DHCP box unless you are familiar with setting the advanced features of OpenStack networks, subnets, and routers.

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5. Router

• Jetstream2 Policy defaults to router quota = 1.
  If you already have the auto_allocated_network and have not requested a quota increase, the button +Create Router may be greyed out.
  -Otherwise-
  

• Click on +Create Router.

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6. Router name

• Enter a router name, for example, <username>_router.
• Under the External Network dropdown, select public, then click Create Router
• After giving it a descriptive name, press the blue NEXT button.

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7. Connect Network to Router

• You’ll need to connect your private network to the router.
  Make sure you’re in Graph mode (vs Topology mode). Your screen should look like the top image on the right.

  • If it looks like it’s in Topology mode, click the Graph tab under the Network Topology page heading to put it into Graph mode

• Click on the router you just created (or auto_allocated_router ),
  then +Add Interface.

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8. Select subnet

• Select the subnet you previously created from the dropdown list.

• Click Submit

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9. The network should now be connected to the new router. The end result will look similar to the diagram.

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