[ixpmanager] Multiple IP addresses on 1 vlan

[Barry O'Donovan]

Hi Arnold,

Arnold Nipper wrote on 23/12/2020 01:37:
> I'm absolutely not familiar with IXP Manager but get confronted with
> this situation.
> 
> With PeeringDB [0] you are able to define as may prefixes on a Vlan as
> you wantl
> 
> With IXP Manager .. or to be more precise with its IX-F JSON export
> there can't only be one per vlan.
 >
> How to model this? E.g in case of a LAN migration.

When INEX faced a LAN migration we looking at specific development 
effort in IXP Manager vs. other options. In the end, we cloned IXP 
Manager and manually updated the database to swap all, for example, 
x.x.x.z addresses to y.y.y.z addresses.

Then at various advertised points during the ~5 day migration window, we 
pointed API endpoints of, e.g., route servers at the new instance, etc. 
which eventually became the production instance.

We probably still have a chunk of this documented and some slides lying 
about and would be happy to turn it into some operational documentation 
for IXP Manager in the new year if an IXP is facing this. It was well 
thought out and went off pretty much flawlessly.

In IXP Manager you can add any addresses you like so there's no specific 
restriction there. There is a restriction on a single network address 
and prefix per VLAN though and this is to match the IX-F Export Schema.

If there's to be a discussion on that, the schema's GitHub issues / 
discussions page on GitHub might be the place for it?

  - Barry