0ddca28454
https://review.opendev.org/c/openstack/neutron/+/820897 added
a dead vlan flow that pushes the dead vlan tag onto frames
belonging to dead ports before these ports are reassigned to
their proper vlans. However add_flow and delete_flows race and
delete_flows may run before add_flow, in this case deleting 0 flows
but not giving us a chance to detect this: neither does it throw
an error nor does it return the number of deleted flows.
This leads to port staying inaccessible forever and hence
breaks corresponding DHCP or router.
Current patch suggests another approach to make sure no packets are
leaked from newly plugged ports: setting their "vlan_mode" attribute
to "trunk" and "trunks"=[4095] (along with assigning dead VLAN tag).
With this OVS normal pipeline will allow only packets tagged with 4095
from such ports [1], which normally not happens, but even if it does -
default rule in br-int will drop them anyway.
Thus untagged packets from such ports will also be dropped until
ovs agent sets proper VLAN tag and clears vlan_mode to default
("access").
This approach avoids the race between dhcp/l3 and ovs agents because
dhcp/l3 agents no longer modify flow table.
This partially reverts commit
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| api-ref | ||
| devstack | ||
| doc | ||
| etc | ||
| neutron | ||
| playbooks | ||
| rally-jobs | ||
| releasenotes | ||
| roles | ||
| tools | ||
| vagrant/ovn | ||
| zuul.d | ||
| .coveragerc | ||
| .gitignore | ||
| .gitreview | ||
| .mailmap | ||
| .pylintrc | ||
| .stestr.conf | ||
| CONTRIBUTING.rst | ||
| HACKING.rst | ||
| LICENSE | ||
| README.rst | ||
| TESTING.rst | ||
| bindep.txt | ||
| lower-constraints.txt | ||
| plugin.spec | ||
| requirements.txt | ||
| setup.cfg | ||
| setup.py | ||
| test-requirements.txt | ||
| tox.ini | ||
README.rst
OpenStack Neutron
Neutron is an OpenStack project to provide "network connectivity as a service" between interface devices (e.g., vNICs) managed by other OpenStack services (e.g., Nova).
To learn more about neutron:
- Documentation: https://docs.openstack.org/neutron/latest/
- Features: https://specs.openstack.org/openstack/neutron-specs
- Defects: https://launchpad.net/neutron
- Release notes: https://docs.openstack.org/releasenotes/neutron/index.html
- Source: https://opendev.org/openstack/neutron
Get in touch via email. Use [Neutron] in your subject.
To learn how to contribute, please read the CONTRIBUTING.rst file.