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Diffstat (limited to 'python/vyos/ifconfig/vxlan.py')
-rw-r--r-- | python/vyos/ifconfig/vxlan.py | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/python/vyos/ifconfig/vxlan.py b/python/vyos/ifconfig/vxlan.py new file mode 100644 index 000000000..bc2ec508b --- /dev/null +++ b/python/vyos/ifconfig/vxlan.py @@ -0,0 +1,91 @@ +# Copyright 2019 VyOS maintainers and contributors <maintainers@vyos.io> +# +# This library is free software; you can redistribute it and/or +# modify it under the terms of the GNU Lesser General Public +# License as published by the Free Software Foundation; either +# version 2.1 of the License, or (at your option) any later version. +# +# This library is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +# Lesser General Public License for more details. +# +# You should have received a copy of the GNU Lesser General Public +# License along with this library. If not, see <http://www.gnu.org/licenses/>. + + +from vyos.ifconfig.interface import Interface + + +class VXLANIf(Interface): + """ + The VXLAN protocol is a tunnelling protocol designed to solve the + problem of limited VLAN IDs (4096) in IEEE 802.1q. With VXLAN the + size of the identifier is expanded to 24 bits (16777216). + + VXLAN is described by IETF RFC 7348, and has been implemented by a + number of vendors. The protocol runs over UDP using a single + destination port. This document describes the Linux kernel tunnel + device, there is also a separate implementation of VXLAN for + Openvswitch. + + Unlike most tunnels, a VXLAN is a 1 to N network, not just point to + point. A VXLAN device can learn the IP address of the other endpoint + either dynamically in a manner similar to a learning bridge, or make + use of statically-configured forwarding entries. + + For more information please refer to: + https://www.kernel.org/doc/Documentation/networking/vxlan.txt + """ + + options = ['group', 'remote', 'dev', 'port', 'vni'] + + default = { + 'type': 'vxlan', + 'vni': 0, + 'dev': '', + 'group': '', + 'remote': '', + 'port': 8472, # The Linux implementation of VXLAN pre-dates + # the IANA's selection of a standard destination port + } + + def __init__(self, ifname, **kargs): + super().__init__(ifname, **kargs) + + def _create(self): + # we assume that by default a multicast interface is created + group = 'group {}'.format(self.config['group']) + + # if remote host is specified we ignore the multicast address + if self.config['remote']: + group = 'remote {}'.format(self.config['remote']) + + # an underlay device is not always specified + dev = '' + if self.config['dev']: + dev = 'dev {}'.format(self.config['dev']) + + cmd = 'ip link add {ifname} type vxlan id {vni} {group} {dev} dstport {port}'.format( + **config) + self._cmd(cmd) + + @staticmethod + def get_config(): + """ + VXLAN interfaces require a configuration when they are added using + iproute2. This static method will provide the configuration dictionary + used by this class. + + Example: + >> dict = VXLANIf().get_config() + """ + config = { + 'vni': 0, + 'dev': '', + 'group': '', + 'port': 8472, # The Linux implementation of VXLAN pre-dates + # the IANA's selection of a standard destination port + 'remote': '' + } + return config |