[Bug 1885169] Re: Some arping version only accept integer number as -w argument

[Pedro Guimarães]

I've ran a test with both arping and iputils-arping. I can notice that
using the "arping" package, indeed it works fine, just like @hopem
commented previously. However, if we run with "iputils-arping" package,
then I see the same issue:

$ sudo arping -A -I <IF> -c 1 -w 1.5 127.0.0.1
arping: invalid argument: '1.5'

As @nobuto mentioned, iputils-arping is the package we are interested on
and therefore, we need this fix on Neutron packages.

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https://bugs.launchpad.net/bugs/1885169

Title:
  Some arping version only accept integer number as -w argument

Status in devstack:
  Fix Released
Status in neutron:
  Fix Released
Status in neutron package in Ubuntu:
  Fix Released
Status in neutron source package in Focal:
  New

Bug description:
  For example, Bionic v2.19-4 accepts "4.5", but not Focal v2.20-1.

  LOG:
  stack at u20:/opt/stack$ arping -A -c 3 -w 4.5 -I br-ex 192.168.20.70
  arping: invalid argument: '4.5'

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