Inter-AS intra-AS routing test

[Nirmala Shenoy]

Hello I would like to set up several AS with a maximum of 15 nodes and then connect 7 of these ASes. This would take 105 nodes. is it possible to reserve this many nodes in a slice?

Would it be more reasonable to reserve for each AS in a site and then connect them.

We plan to conduct some performance studies of inter-AS and intra-AS communications.

[Ilya Baldin]

At least in my experience you are not likely to succeed getting a single slice this large in one shot. One of two things is a better approach:

1. Build separate slices (if you are using FABNetv4 or FABNetv4Ext it is easy to get them all to communicate with each other)
2. Build up a single slice by growing it via ‘modify’ (if a modify fails on a given site because it is out of resources, you move on to the next to get more nodes)

I am not sure (2) is worth the trouble for what you are describing.

• This reply was modified 4 months, 3 weeks ago by Ilya Baldin.

[Ilya Baldin]

I have this artifact notebook that shows how to do (2), but again, for your example I wouldn’t worry about this

https://artifacts.fabric-testbed.net/artifacts/e1771f8d-ca7a-42fc-b6ec-542df83168a8

 

[Nirmala Shenoy]

Thanks Ilya.

Any jupyter examples that I can use to test option 1?

 

thanks

 

[Ilya Baldin]

I think this example creates multiple slices to test MTU between sites

https://github.com/fabric-testbed/jupyter-examples/blob/e5487fce171e22f47c89a1dd6b0dda56342d0496/fabric_examples/acceptance_testing/Acceptance%20Tests%204.2.2/functional_test_4.2.2-shared-nic.ipynb

 

[Tejas Ramakant Mhadgut]

Hi Ilya,

using your above example, I am able to create multiple slices but how do I setup a gateway communication between those slices?

Thanks

[Ilya Baldin]

Assuming all your slices have their own instances of FABNetv4 network, simply adding a route pointed at the FABNetv4 gateway to the entire FABNetv4 subnet will let your nodes in different slices talk to each other:

full_subnet = ipaddress.IPv4Network('10.128.0.0/10')

node.ip_route_add(subnet=full_subnet, gateway=site_net.get_gateway())

 

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