The RPM packages for Open vSwitch provide some integration with Red
Hat’s network scripts. Using this integration is optional.
To use the integration for a Open vSwitch bridge or interface named
This is a shell script that consists of a series of VARIABLE=VALUE
assignments. The following OVS-specific variable names are supported:
- DEVICETYPE: Always set to "ovs".
- TYPE: If this is "OVSBridge", then this file represents an OVS
bridge named . Otherwise, it represents a port on an OVS
bridge and TYPE must have one of the following values:
* "OVSPort", if is a physical port (e.g. eth0) or
virtual port (e.g. vif1.0).
* "OVSIntPort", if is an internal port (e.g. a tagged
VLAN).
* "OVSBond", if is an OVS bond.
* "OVSTunnel", if is an OVS tunnel.
* "OVSPatchPort", if is a patch port
- OVS_BRIDGE: If TYPE is anything other than "OVSBridge", set to
the name of the OVS bridge to which the port should be attached.
- OVS_OPTIONS: Optionally, extra options to set in the "Port"
table when adding the port to the bridge, as a sequence of
column[:key]=value options. For example, "tag=100" to make the
port an access port for VLAN 100. See the documentation of
"add-port" in ovs-vsctl(8) for syntax and the section on the
Port table in ovs-vswitchd.conf.db(5) for available options.
- OVS_EXTRA: Optionally, additional ovs-vsctl commands, separated
by "--" (double dash).
- BOND_IFACES: For "OVSBond" interfaces, a list of physical
interfaces to bond together.
- OVS_TUNNEL_TYPE: For "OVSTunnel" interfaces, the type of the tunnel.
For example, "gre", "vxlan", etc.
- OVS_TUNNEL_OPTIONS: For "OVSTunnel" interfaces, this field should be
used to specify the tunnel options like remote_ip, key, etc.
- OVS_PATCH_PEER: For "OVSPatchPort" devices, this field specifies
the patch's peer on the other bridge.
Note
----
* "ifdown" on a bridge will not bring individual ports on the bridge
down. "ifup" on a bridge will not add ports to the bridge. This
behavior should be compatible with standard bridges (with
TYPE=Bridge).
* If 'ifup' on an interface is called multiple times, one can see
"RTNETLINK answers: File exists" printed on the console. This comes from
ifup-eth trying to add zeroconf route multiple times and is harmless.
Examples
--------
Standalone bridge:
==> ifcfg-ovsbridge0 <==
DEVICE=ovsbridge0
ONBOOT=yes
DEVICETYPE=ovs
TYPE=OVSBridge
BOOTPROTO=static
IPADDR=A.B.C.D
NETMASK=X.Y.Z.0
HOTPLUG=no
Enable DHCP on the bridge:
* Needs OVSBOOTPROTO instead of BOOTPROTO.
* All the interfaces that can reach the DHCP server
as a space separated list in OVSDHCPINTERFACES.
DEVICE=ovsbridge0
ONBOOT=yes
DEVICETYPE=ovs
TYPE=OVSBridge
OVSBOOTPROTO="dhcp"
OVSDHCPINTERFACES="eth0"
HOTPLUG=no
Adding Internal Port to ovsbridge0:
==> ifcfg-intbr0 <==
DEVICE=intbr0
ONBOOT=yes
DEVICETYPE=ovs
TYPE=OVSIntPort
OVS_BRIDGE=ovsbridge0
HOTPLUG=no
Internal Port with fixed IP address:
DEVICE=intbr0
ONBOOT=yes
DEVICETYPE=ovs
TYPE=OVSIntPort
OVS_BRIDGE=ovsbridge0
BOOTPROTO=static
IPADDR=A.B.C.D
NETMASK=X.Y.Z.0
HOTPLUG=no
Internal Port with DHCP:
* Needs OVSBOOTPROTO or BOOTPROTO.
* All the interfaces that can reach the DHCP server
as a space separated list in OVSDHCPINTERFACES.
DEVICE=intbr0
ONBOOT=yes
DEVICETYPE=ovs
TYPE=OVSIntPort
OVS_BRIDGE=ovsbridge0
OVSBOOTPROTO="dhcp"
OVSDHCPINTERFACES="eth0"
HOTPLUG=no
Adding physical eth0 to ovsbridge0 described above:
==> ifcfg-eth0 <==
DEVICE=eth0
ONBOOT=yes
DEVICETYPE=ovs
TYPE=OVSPort
OVS_BRIDGE=ovsbridge0
BOOTPROTO=none
HOTPLUG=no
Tagged VLAN interface on top of ovsbridge0:
==> ifcfg-vlan100 <==
DEVICE=vlan100
ONBOOT=yes
DEVICETYPE=ovs
TYPE=OVSIntPort
BOOTPROTO=static
IPADDR=A.B.C.D
NETMASK=X.Y.Z.0
OVS_BRIDGE=ovsbridge0
OVS_OPTIONS="tag=100"
OVS_EXTRA="set Interface $DEVICE external-ids:iface-id=$(hostname -s)-$DEVICE-vif"
HOTPLUG=no
Bonding:
==> ifcfg-bond0 <==
DEVICE=bond0
ONBOOT=yes
DEVICETYPE=ovs
TYPE=OVSBond
OVS_BRIDGE=ovsbridge0
BOOTPROTO=none
BOND_IFACES="gige-1b-0 gige-1b-1 gige-21-0 gige-21-1"
OVS_OPTIONS="bond_mode=balance-tcp lacp=active"
HOTPLUG=no
==> ifcfg-gige-* <==
DEVICE=gige-*
ONBOOT=yes
HOTPLUG=no
An Open vSwitch Tunnel:
==> ifcfg-gre0 <==
DEVICE=ovs-gre0
ONBOOT=yes
DEVICETYPE=ovs
TYPE=OVSTunnel
OVS_BRIDGE=ovsbridge0
OVS_TUNNEL_TYPE=gre
OVS_TUNNEL_OPTIONS="options:remote_ip=A.B.C.D"
Patch Ports:
==> ifcfg-patch-ovs-0 <==
DEVICE=patch-ovs-0
ONBOOT=yes
DEVICETYPE=ovs
TYPE=OVSPatchPort
OVS_BRIDGE=ovsbridge0
OVS_PATCH_PEER=patch-ovs-1
==> ifcfg-patch-ovs-1 <==
DEVICE=patch-ovs-1
ONBOOT=yes
DEVICETYPE=ovs
TYPE=OVSPatchPort
OVS_BRIDGE=ovsbridge1
OVS_PATCH_PEER=patch-ovs-0
------fake bridge configuration--------------
DEVICE=vlan65 DEVICETYPE=ovs TYPE=OVSBridge ONBOOT=yes BOOTPROTO=static STP=off NM_CONTROLLED=no HOTPLUG=no OVS_EXTRA="br-set-external-id $DEVICE bridge-id $DEVICE" OVS_OPTIONS="br0 65"
Variation of fake bridge ==> ifcfg-vlan100 <== DEVICE=vlan12 ONBOOT=yes DEVICETYPE=ovs TYPE=OVSIntPort BOOTPROTO=static IPADDR=A.B.C.D NETMASK=X.Y.Z.0 OVS_BRIDGE=ovsbr OVS_OPTIONS="tag=12" OVS_EXTRA="set Interface $DEVICE external-ids:iface-id=$(hostname -s)-$DEVICE-vif" HOTPLUG=no
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