[Bug 2032825] Re: classless routes served by DHCP not in installer/BusyBox

[Hartmut Koptein]

Hi,
i found an older bug report: 

https://bugs.launchpad.net/subiquity/+bug/1937110

The option comes from the DHCP-Server (it is Infoblox). If our network-
team switch it to the 'Option Router' busybox has a default-gw and the
installation process succeds. But the default option from the DHCP-
Server is - with more network interfaces, two, three, four, ... - the
DHCP Server sends all routing information for each interface (Option
121), not only the one for the default-GW.

The dhcp-client (in busybox) cannot handle this and the result is "no
route"

Greetings,

Hartmut

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https://bugs.launchpad.net/bugs/2032825

Title:
  classless routes served by DHCP not in installer/BusyBox

Status in casper package in Ubuntu:
  Incomplete
Status in isc-dhcp package in Ubuntu:
  Incomplete

Bug description:
  Hi,

  we have many installation with two or more network interfaces. The
  standard ist classless routes DHCP Option 121. This ist functional for
  SLES und RHEL Installations, but not for ubuntu installation.

  The bug ist with all version of ubuntu, namely we use currently
  ubuntu20 LTS and ubuntu22 LTS.

  After PXE booting, kernel und initial Ramdisk, the installer become IP
  and Nameserver and so on, but not a default GW IP, because of
  classless. So this installation cannot reach other server, for example
  foreman.

  Please fix this in BusyBox, this bug ist open for serveral years.

  Hope for a fast response,

  Hartmut Koptein

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