[Bug 1914740] Re: IPs are not assigned for Hipersockets in DHCP mode

[Dimitri John Ledkov]

I have made this PPA

https://launchpad.net/~ci-train-ppa-service/+archive/ubuntu/4477

It has packages for focal versioned above current focal-updates version,
but lower than the next SRU.

sudo add-apt-repository ppa:ci-train-ppa-service/4477
sudo apt install systemd

Should be enough to upgrade networkd. After that if you have installed
network.d snippets you should remove them, and then reboot and things
should just work. If reboot is too much doing chzdev -d / -e on the
hipersocket interfaces that are in l3 should do the trick as well.

After testing you can downgrade / remove those packages with ppa-purge,
or just leave them until next SRU update arrives.

If you can't use add-apt-repository (needs http(s) access to
api.launchpad.net and ppa.launchpad.net) you can also download the .deb
files from https://launchpad.net/~ci-train-ppa-
service/+archive/ubuntu/4477/+build/21099271 and install them with $
sudo apt ./*.deb => do not it has to "absolute path names, or paths
prefixed with ./" for apt to recognise them to install from local files
instead of trying to fetch things from the mirror.

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https://bugs.launchpad.net/bugs/1914740

Title:
  IPs are not assigned for Hipersockets in DHCP mode

Status in Ubuntu on IBM z Systems:
  Incomplete
Status in isc-dhcp package in Ubuntu:
  Confirmed
Status in netplan.io package in Ubuntu:
  Confirmed
Status in systemd package in Ubuntu:
  Confirmed

Bug description:
  ---Problem Description---
  IPs are not getting assigned for Hipersockets in DHCP mode
   
  Contact Information = Asha Shekharappa(ashshekh at in.ibm.com)  Sankar(sankar453 at in.ibm.com) 
   
  ---uname output---
  52-Ubuntu SMP Thu Sep 10 10:59:04 UTC 2020 s390x s390x s390x GNU/Linux
   
  Machine Type = s390x 
   
  ---Debugger---
  A debugger is not configured
   
  ---Steps to Reproduce---
   Ubuntu 20.04
  Netplan with systemd-networkd as renderer

  Creating ethernet connection on Hipersockets device in DHCP mode fails
  to assign IPs

  1. Configure a Hipersockets device
     chzdev -e 0.0.8f00

  2. Create a .yaml file with the below details

  network:
      version: 2
      ethernets:
          enc8f00:
              dhcp4: yes

  3. netplan apply

  
  4. The IP is not assigned as seen below

  root at M96SANKAR:/etc/netplan# ip a s

  enc8f00: <BROADCAST,MULTICAST,NOARP,UP,LOWER_UP> mtu 32768 qdisc mq state UP group default qlen 1000
      link/ether fe:da:af:44:08:02 brd ff:ff:ff:ff:ff:ff

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