Comment 2 for bug 1454734

Reviewed: https://review.openstack.org/209249
Committed: https://git.openstack.org/cgit/openstack/networking-cisco/commit/?id=77d4a60fbce7f81275c3cdd9fec3b28a1ca0c57c
Submitter: Jenkins
Branch: stable/kilo

commit 77d4a60fbce7f81275c3cdd9fec3b28a1ca0c57c
Author: Rich Curran <email address hidden>
Date: Wed Jul 1 13:06:07 2015 -0400

    ML2 cisco_nexus MD: If configured, close ssh sessions

    Most (if not all) Nexus switches have a limit of eight ssh sessions open
    at one time. With the openstack/neutron introduction of rpc and api workers
    (setting these variables results in additional neutron-server processes
    being forked) when more than eight processes are in use (including one for
    the parent neutron-server process) the ssh limit on the nexus switches is
    exceeded and exceptions are taken. More importantly is that communication
    to the nexus switches can not be made for the nineth (or above) processes.

    This nexus switch limitation will be fixed by closing each session after
    each event if the overall number of processes is >= eight.

    Change-Id: Ie953c955c6e045a1b252e6973f53b38284833f37
    Closes-Bug: #1454734
    (cherry picked from commit 1eec7fb821e4d75fb6f875f9edeb2977bfcd88ef)