====== Driver test: link interruption ======

===== Rationale =====

Downloading a large file via HTTP provides an opportunity to test the ability of the card to cope with a temporary link loss.

{{ :clipart:nic.jpeg?237x222|A network card}}

===== Preparation ======

Create a 512MB file containing pseudo-random data, using e.g.:

    dd if=/dev/urandom of=512mb bs=1M count=512

Copy your pseudo-random data file to a web server on your local network.

===== Test sequence =====

  - Before starting, ensure the network cable is connected to a network which provides a DHCP server and a web server which can serve your pseudo-random data file.
  - Boot into iPXE.
  - Use ifstat to identify the name of your network interface (hereafter assumed to be ''net0'').
  - Open the interface and obtain an IP address using ''[[:cmd:dhcp]] net0''.
  - Download the pseudo-random data file using ''[[:cmd:imgfetch]]''.
  - Before the transfer completes, disconnect the network cable.
  - Verify that the transfer stops making progress.
  - After a few seconds, reconnect the network cable.
  - Verify that the transfer resumes and completes successfully.