81e793d9f1
This patch introduces VXLAN support for Linuxbridge agent alongside with ml2 plugin support in linubridge mechnism driver. A new vxlan configuration section is added for vxlan related parameters. The agent also implements l2population RPC callbacks which allows ml2 plugin using l2population mechnism driver to populate vxlan forwarding and neighbor tables following portbinding events. It allows agent to respond locally to ARP requests for remote VMs and avoid dataplane based learning. This should help limiting the use of multicast or flooding for broadcast emulation in vxlan networks. These changes should anyway have a limited risk, as agent behaviour shouldn't be affected, except when vxlan is enabled alongside ml2 plugin. Implements: blueprint l2-population Change-Id: I99a961c53f9e451409f1affb079042936d8ae5c6
50 lines
1.5 KiB
Python
50 lines
1.5 KiB
Python
# vim: tabstop=4 shiftwidth=4 softtabstop=4
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#
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# Copyright 2012 Cisco Systems, Inc. All rights reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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#
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# @author: Sumit Naiksatam, Cisco Systems, Inc.
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FLAT_VLAN_ID = -1
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LOCAL_VLAN_ID = -2
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# Values for network_type
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TYPE_FLAT = 'flat'
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TYPE_VLAN = 'vlan'
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TYPE_VXLAN = 'vxlan'
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TYPE_LOCAL = 'local'
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TYPE_NONE = 'none'
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# Supported VXLAN features
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VXLAN_NONE = 'not_supported'
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VXLAN_MCAST = 'multicast_flooding'
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VXLAN_UCAST = 'unicast_flooding'
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# Corresponding minimal kernel versions requirements
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MIN_VXLAN_KVER = {VXLAN_MCAST: '3.8', VXLAN_UCAST: '3.11'}
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# TODO(rkukura): Eventually remove this function, which provides
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# temporary backward compatibility with pre-Havana RPC and DB vlan_id
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# encoding.
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def interpret_vlan_id(vlan_id):
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"""Return (network_type, segmentation_id) tuple for encoded vlan_id."""
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if vlan_id == LOCAL_VLAN_ID:
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return (TYPE_LOCAL, None)
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elif vlan_id == FLAT_VLAN_ID:
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return (TYPE_FLAT, None)
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else:
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return (TYPE_VLAN, vlan_id)
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