[ovs-git] [ovn-org/ovn] 58611a: ovn-northd: Optionally skip the check of lsp_is_up.

[Han Zhou]

  Branch: refs/heads/master
  Home:   https://github.com/ovn-org/ovn
  Commit: 58611a51051e76d22b46fcf1350023d9a4e55183
      https://github.com/ovn-org/ovn/commit/58611a51051e76d22b46fcf1350023d9a4e55183
  Author: Han Zhou <hzhou at ovn.org>
  Date:   2020-09-09 (Wed, 09 Sep 2020)

  Changed paths:
    M northd/ovn-northd.8.xml
    M northd/ovn-northd.c
    M ovn-nb.xml
    M tests/ovn-northd.at

  Log Message:
  -----------
  ovn-northd: Optionally skip the check of lsp_is_up.

The checking of lsp "up" status before adding ARP responder flows was
added to avoid confusion in cases when a network admin sees ARP response
for VM/containers that is not up on chassis yet. However, this check
introduces an extra round of flow change in SB and triggers computes
on hypervisors which is unnecessary cost in most cases, especially for
large scale environment. To improve this, this patch provides an option
ignore_lsp_down to disable the check for the use cases when ARP reponse for a
port that is "down" isn't considered harmful.

Acked-by: Numan Siddique <numans at ovn.org>
Signed-off-by: Han Zhou <hzhou at ovn.org>