Comment 1 for bug 1934904

A possible solution would be to use noop driver.

[securitygroup]
{% if neutron_security_groups and not enable_dpdk -%}
enable_security_group = True
firewall_driver = {{ firewall_driver }}
{% else -%}
enable_security_group = False
firewall_driver = neutron.agent.firewall.NoopFirewallDriver
{% endif -%}