[Bug 1964364] [NEW] Autoinstall does not support more than two vlans on a bonded interface

[Tim Keller]

Public bug reported:

While attemping to pxe autoinstall a large number of Ubuntu 20.04 servers, we discovered the maximum number of vlan's supported by a bonded interface is two.
Adding a third vlan to the YAML config causes the autoinstall to crash.
Removing that third vlan causes the autoinstall to work just fine.

** Affects: subiquity (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1964364

Title:
  Autoinstall does not support more than two vlans on a bonded interface

Status in subiquity package in Ubuntu:
  New

Bug description:
  While attemping to pxe autoinstall a large number of Ubuntu 20.04 servers, we discovered the maximum number of vlan's supported by a bonded interface is two.
  Adding a third vlan to the YAML config causes the autoinstall to crash.
  Removing that third vlan causes the autoinstall to work just fine.

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