vtep(5) Open vSwitch Manual vtep(5)
NAME
vtep - hardware_vtep database schema
This schema specifies relations that a VTEP can use to integrate physi‐
cal ports into logical switches maintained by a network virtualization
controller such as NSX.
Glossary:
VTEP VXLAN Tunnel End Point, an entity which originates and/or
terminates VXLAN tunnels.
HSC Hardware Switch Controller.
NVC Network Virtualization Controller, e.g. NSX.
VRF Virtual Routing and Forwarding instance.
Common Column
Some tables contain a column, named other_config. This column has the
same form and purpose each place that it appears, so we describe it
here to save space later.
other_config: map of string-string pairs
Key-value pairs for configuring rarely used or propri‐
etary features.
Some tables do not have other_config column because no
key-value pairs have yet been defined for them.
TABLE SUMMARY
The following list summarizes the purpose of each of the tables in the
hardware_vtep database. Each table is described in more detail on a
later page.
Table Purpose
Global Top-level configuration.
Manager OVSDB management connection.
Physical_Switch
A physical switch.
Tunnel A tunnel created by a physical switch.
Physical_Port
A port within a physical switch.
Logical_Binding_Stats
Statistics for a VLAN on a physical port bound to a logical
network.
Logical_Switch
A layer-2 domain.
Ucast_Macs_Local
Unicast MACs (local)
Ucast_Macs_Remote
Unicast MACs (remote)
Mcast_Macs_Local
Multicast MACs (local)
Mcast_Macs_Remote
Multicast MACs (remote)
Logical_Router
A logical L3 router.
Arp_Sources_Local
ARP source addresses for logical routers
Arp_Sources_Remote
ARP source addresses for logical routers
Physical_Locator_Set
Physical_Locator_Set configuration.
Physical_Locator
Physical_Locator configuration.
ACL_entry ACL_entry configuration.
ACL ACL configuration.
Global TABLE
Top-level configuration for a hardware VTEP. There must be exactly one
record in the Global table.
Summary:
switches set of Physical_Switchs
Database Configuration:
managers set of Managers
Common Column:
other_config map of string-string pairs
Details:
switches: set of Physical_Switchs
The physical switch or switches managed by the VTEP.
When a physical switch integrates support for this VTEP schema,
which is expected to be the most common case, this column should
point to one Physical_Switch record that represents the switch
itself. In another possible implementation, a server or a VM
presents a VTEP schema front-end interface to one or more physi‐
cal switches, presumably communicating with those physical
switches over a proprietary protocol. In that case, this column
would point to one Physical_Switch for each physical switch, and
the set might change over time as the front-end server comes to
represent a differing set of switches.
Database Configuration:
These columns primarily configure the database server (ovsdb-server),
not the hardware VTEP itself.
managers: set of Managers
Database clients to which the database server should connect or
to which it should listen, along with options for how these con‐
nection should be configured. See the Manager table for more in‐
formation.
Common Column:
The overall purpose of this column is described under Common Column at
the beginning of this document.
other_config: map of string-string pairs
Manager TABLE
Configuration for a database connection to an Open vSwitch Database
(OVSDB) client.
The database server can initiate and maintain active connections to re‐
mote clients. It can also listen for database connections.
Summary:
Core Features:
target string (must be unique within table)
Client Failure Detection and Handling:
max_backoff optional integer, at least 1,000
inactivity_probe optional integer
Status:
is_connected boolean
status : last_error optional string
status : state optional string, one of ACTIVE, BACKOFF,
CONNECTING, IDLE, or VOID
status : sec_since_connect optional string, containing an integer,
at least 0
status : sec_since_disconnect
optional string, containing an integer,
at least 0
status : locks_held optional string
status : locks_waiting optional string
status : locks_lost optional string
status : n_connections optional string, containing an integer,
at least 2
Connection Parameters:
other_config : dscp optional string, containing an integer
Details:
Core Features:
target: string (must be unique within table)
Connection method for managers.
The following connection methods are currently supported:
ssl:host[:port]
The specified SSL port (default: 6640) on the given host,
which can either be a DNS name (if built with unbound li‐
brary) or an IP address.
SSL key and certificate configuration happens outside the
database.
tcp:host[:port]
The specified TCP port (default: 6640) on the given host,
which can either be a DNS name (if built with unbound li‐
brary) or an IP address.
pssl:[port][:host]
Listens for SSL connections on the specified TCP port
(default: 6640). If host, which can either be a DNS name
(if built with unbound library) or an IP address, is
specified, then connections are restricted to the re‐
solved or specified local IP address.
ptcp:[port][:host]
Listens for connections on the specified TCP port (de‐
fault: 6640). If host, which can either be a DNS name (if
built with unbound library) or an IP address, is speci‐
fied, then connections are restricted to the resolved or
specified local IP address.
Client Failure Detection and Handling:
max_backoff: optional integer, at least 1,000
Maximum number of milliseconds to wait between connection at‐
tempts. Default is implementation-specific.
inactivity_probe: optional integer
Maximum number of milliseconds of idle time on connection to the
client before sending an inactivity probe message. If the Open
vSwitch database does not communicate with the client for the
specified number of seconds, it will send a probe. If a response
is not received for the same additional amount of time, the
database server assumes the connection has been broken and at‐
tempts to reconnect. Default is implementation-specific. A value
of 0 disables inactivity probes.
Status:
is_connected: boolean
true if currently connected to this manager, false otherwise.
status : last_error: optional string
A human-readable description of the last error on the connection
to the manager; i.e. strerror(errno). This key will exist only
if an error has occurred.
status : state: optional string, one of ACTIVE, BACKOFF, CONNECTING,
IDLE, or VOID
The state of the connection to the manager:
VOID Connection is disabled.
BACKOFF
Attempting to reconnect at an increasing period.
CONNECTING
Attempting to connect.
ACTIVE Connected, remote host responsive.
IDLE Connection is idle. Waiting for response to keep-alive.
These values may change in the future. They are provided only
for human consumption.
status : sec_since_connect: optional string, containing an integer, at
least 0
The amount of time since this manager last successfully con‐
nected to the database (in seconds). Value is empty if manager
has never successfully connected.
status : sec_since_disconnect: optional string, containing an integer,
at least 0
The amount of time since this manager last disconnected from the
database (in seconds). Value is empty if manager has never dis‐
connected.
status : locks_held: optional string
Space-separated list of the names of OVSDB locks that the con‐
nection holds. Omitted if the connection does not hold any
locks.
status : locks_waiting: optional string
Space-separated list of the names of OVSDB locks that the con‐
nection is currently waiting to acquire. Omitted if the connec‐
tion is not waiting for any locks.
status : locks_lost: optional string
Space-separated list of the names of OVSDB locks that the con‐
nection has had stolen by another OVSDB client. Omitted if no
locks have been stolen from this connection.
status : n_connections: optional string, containing an integer, at
least 2
When target specifies a connection method that listens for in‐
bound connections (e.g. ptcp: or pssl:) and more than one con‐
nection is actually active, the value is the number of active
connections. Otherwise, this key-value pair is omitted.
When multiple connections are active, status columns and key-
value pairs (other than this one) report the status of one arbi‐
trarily chosen connection.
Connection Parameters:
Additional configuration for a connection between the manager and the
database server.
other_config : dscp: optional string, containing an integer
The Differentiated Service Code Point (DSCP) is specified using
6 bits in the Type of Service (TOS) field in the IP header. DSCP
provides a mechanism to classify the network traffic and provide
Quality of Service (QoS) on IP networks. The DSCP value speci‐
fied here is used when establishing the connection between the
manager and the database server. If no value is specified, a de‐
fault value of 48 is chosen. Valid DSCP values must be in the
range 0 to 63.
Physical_Switch TABLE
A physical switch that implements a VTEP.
Summary:
ports set of Physical_Ports
tunnels set of Tunnels
Network Status:
management_ips set of strings
tunnel_ips set of strings
Identification:
name string (must be unique within table)
description string
Error Notification:
switch_fault_status : mac_table_exhaustion
none
switch_fault_status : tunnel_exhaustion
none
switch_fault_status : lr_switch_bindings_fault
none
switch_fault_status : lr_static_routes_fault
none
switch_fault_status : lr_creation_fault
none
switch_fault_status : lr_support_fault
none
switch_fault_status : unspecified_fault
none
switch_fault_status : unsupported_source_node_replication
none
Common Column:
other_config map of string-string pairs
Details:
ports: set of Physical_Ports
The physical ports within the switch.
tunnels: set of Tunnels
Tunnels created by this switch as instructed by the NVC.
Network Status:
management_ips: set of strings
IPv4 or IPv6 addresses at which the switch may be contacted for
management purposes.
tunnel_ips: set of strings
IPv4 or IPv6 addresses on which the switch may originate or ter‐
minate tunnels.
This column is intended to allow a Manager to determine the
Physical_Switch that terminates the tunnel represented by a
Physical_Locator.
Identification:
name: string (must be unique within table)
Symbolic name for the switch, such as its hostname.
description: string
An extended description for the switch, such as its switch login
banner.
Error Notification:
An entry in this column indicates to the NVC that this switch has en‐
countered a fault. The switch must clear this column when the fault has
been cleared.
switch_fault_status : mac_table_exhaustion: none
Indicates that the switch has been unable to process MAC entries
requested by the NVC due to lack of table resources.
switch_fault_status : tunnel_exhaustion: none
Indicates that the switch has been unable to create tunnels re‐
quested by the NVC due to lack of resources.
switch_fault_status : lr_switch_bindings_fault: none
Indicates that the switch has been unable to create the logical
router interfaces requested by the NVC due to conflicting con‐
figurations or a lack of hardware resources.
switch_fault_status : lr_static_routes_fault: none
Indicates that the switch has been unable to create the static
routes requested by the NVC due to conflicting configurations or
a lack of hardware resources.
switch_fault_status : lr_creation_fault: none
Indicates that the switch has been unable to create the logical
router requested by the NVC due to conflicting configurations or
a lack of hardware resources.
switch_fault_status : lr_support_fault: none
Indicates that the switch does not support logical routing.
switch_fault_status : unspecified_fault: none
Indicates that an error has occurred in the switch but that no
more specific information is available.
switch_fault_status : unsupported_source_node_replication: none
Indicates that the requested source node replication mode cannot
be supported by the physical switch; this specifically means in
this context that the physical switch lacks the capability to
support source node replication mode. This error occurs when a
controller attempts to set source node replication mode for one
of the logical switches that the physical switch is keeping con‐
text for. An NVC that observes this error should take appropri‐
ate action (for example reverting the logical switch to service
node replication mode). It is recommended that an NVC be proac‐
tive and test for support of source node replication by using a
test logical switch on vtep physical switch nodes and then try‐
ing to change the replication mode to source node on this logi‐
cal switch, checking for error. The NVC could remember this ca‐
pability per vtep physical switch. Using mixed replication modes
on a given logical switch is not recommended. Service node
replication mode is considered a basic requirement since it only
requires sending a packet to a single transport node, hence it
is not expected that a switch should report that service node
mode cannot be supported.
Common Column:
The overall purpose of this column is described under Common Column at
the beginning of this document.
other_config: map of string-string pairs
Tunnel TABLE
A tunnel created by a Physical_Switch.
Summary:
local Physical_Locator
remote Physical_Locator
Bidirectional Forwarding Detection (BFD):
BFD Local Configuration:
bfd_config_local : bfd_dst_mac
optional string
bfd_config_local : bfd_dst_ip
optional string
BFD Remote Configuration:
bfd_config_remote : bfd_dst_mac
optional string
bfd_config_remote : bfd_dst_ip
optional string
BFD Parameters:
bfd_params : enable optional string, either true or false
bfd_params : min_rx optional string, containing an integer,
at least 1
bfd_params : min_tx optional string, containing an integer,
at least 1
bfd_params : decay_min_rx
optional string, containing an integer
bfd_params : forwarding_if_rx
optional string, either true or false
bfd_params : cpath_down optional string, either true or false
bfd_params : check_tnl_key
optional string, either true or false
BFD Status:
bfd_status : enabled optional string, either true or false
bfd_status : state optional string, one of admin_down, down,
init, or up
bfd_status : forwarding optional string, either true or false
bfd_status : diagnostic optional string
bfd_status : remote_state
optional string, one of admin_down, down,
init, or up
bfd_status : remote_diagnostic
optional string
bfd_status : info optional string
Details:
local: Physical_Locator
Tunnel end-point local to the physical switch.
remote: Physical_Locator
Tunnel end-point remote to the physical switch.
Bidirectional Forwarding Detection (BFD):
BFD, defined in RFC 5880, allows point to point detection of connectiv‐
ity failures by occasional transmission of BFD control messages. VTEPs
are expected to implement BFD.
BFD operates by regularly transmitting BFD control messages at a rate
negotiated independently in each direction. Each endpoint specifies the
rate at which it expects to receive control messages, and the rate at
which it’s willing to transmit them. An endpoint which fails to receive
BFD control messages for a period of three times the expected reception
rate will signal a connectivity fault. In the case of a unidirectional
connectivity issue, the system not receiving BFD control messages will
signal the problem to its peer in the messages it transmits.
A hardware VTEP is expected to use BFD to determine reachability of de‐
vices at the end of the tunnels with which it exchanges data. This can
enable the VTEP to choose a functioning service node among a set of
service nodes providing high availability. It also enables the NVC to
report the health status of tunnels.
In many cases the BFD peer of a hardware VTEP will be an Open vSwitch
instance. The Open vSwitch implementation of BFD aims to comply faith‐
fully with the requirements put forth in RFC 5880. Open vSwitch does
not implement the optional Authentication or ``Echo Mode’’ features.
BFD Local Configuration:
The HSC writes the key-value pairs in the bfd_config_local column to
specify the local configurations to be used for BFD sessions on this
tunnel.
bfd_config_local : bfd_dst_mac: optional string
Set to an Ethernet address in the form xx:xx:xx:xx:xx:xx to set
the MAC expected as destination for received BFD packets. The
default is 00:23:20:00:00:01.
bfd_config_local : bfd_dst_ip: optional string
Set to an IPv4 address to set the IP address that is expected as
destination for received BFD packets. The default is
169.254.1.0.
BFD Remote Configuration:
The bfd_config_remote column is the remote counterpart of the bfd_con‐
fig_local column. The NVC writes the key-value pairs in this column.
bfd_config_remote : bfd_dst_mac: optional string
Set to an Ethernet address in the form xx:xx:xx:xx:xx:xx to set
the destination MAC to be used for transmitted BFD packets. The
default is 00:23:20:00:00:01.
bfd_config_remote : bfd_dst_ip: optional string
Set to an IPv4 address to set the IP address used as destination
for transmitted BFD packets. The default is 169.254.1.1.
BFD Parameters:
The NVC sets up key-value pairs in the bfd_params column to enable and
configure BFD.
bfd_params : enable: optional string, either true or false
True to enable BFD on this Tunnel. If not specified, BFD will
not be enabled by default.
bfd_params : min_rx: optional string, containing an integer, at least 1
The shortest interval, in milliseconds, at which this BFD ses‐
sion offers to receive BFD control messages. The remote endpoint
may choose to send messages at a slower rate. Defaults to 1000.
bfd_params : min_tx: optional string, containing an integer, at least 1
The shortest interval, in milliseconds, at which this BFD ses‐
sion is willing to transmit BFD control messages. Messages will
actually be transmitted at a slower rate if the remote endpoint
is not willing to receive as quickly as specified. Defaults to
100.
bfd_params : decay_min_rx: optional string, containing an integer
An alternate receive interval, in milliseconds, that must be
greater than or equal to bfd_params:min_rx. The implementation
should switch from bfd_params:min_rx to bfd_params:decay_min_rx
when there is no obvious incoming data traffic at the tunnel, to
reduce the CPU and bandwidth cost of monitoring an idle tunnel.
This feature may be disabled by setting a value of 0. This fea‐
ture is reset whenever bfd_params:decay_min_rx or
bfd_params:min_rx changes.
bfd_params : forwarding_if_rx: optional string, either true or false
When true, traffic received on the Tunnel is used to indicate
the capability of packet I/O. BFD control packets are still
transmitted and received. At least one BFD control packet must
be received every 100 * bfd_params:min_rx amount of time. Other‐
wise, even if traffic is received, the bfd_params:forwarding
will be false.
bfd_params : cpath_down: optional string, either true or false
Set to true to notify the remote endpoint that traffic should
not be forwarded to this system for some reason other than a
connectivity failure on the interface being monitored. The typi‐
cal underlying reason is ``concatenated path down,’’ that is,
that connectivity beyond the local system is down. Defaults to
false.
bfd_params : check_tnl_key: optional string, either true or false
Set to true to make BFD accept only control messages with a tun‐
nel key of zero. By default, BFD accepts control messages with
any tunnel key.
BFD Status:
The VTEP sets key-value pairs in the bfd_status column to report the
status of BFD on this tunnel. When BFD is not enabled, with
bfd_params:enable, the HSC clears all key-value pairs from bfd_status.
bfd_status : enabled: optional string, either true or false
Set to true if the BFD session has been successfully enabled.
Set to false if the VTEP cannot support BFD or has insufficient
resources to enable BFD on this tunnel. The NVC will disable the
BFD monitoring on the other side of the tunnel once this value
is set to false.
bfd_status : state: optional string, one of admin_down, down, init, or
up
Reports the state of the BFD session. The BFD session is fully
healthy and negotiated if UP.
bfd_status : forwarding: optional string, either true or false
Reports whether the BFD session believes this Tunnel may be used
to forward traffic. Typically this means the local session is
signaling UP, and the remote system isn’t signaling a problem
such as concatenated path down.
bfd_status : diagnostic: optional string
A diagnostic code specifying the local system’s reason for the
last change in session state. The error messages are defined in
section 4.1 of [RFC 5880].
bfd_status : remote_state: optional string, one of admin_down, down,
init, or up
Reports the state of the remote endpoint’s BFD session.
bfd_status : remote_diagnostic: optional string
A diagnostic code specifying the remote system’s reason for the
last change in session state. The error messages are defined in
section 4.1 of [RFC 5880].
bfd_status : info: optional string
A short message providing further information about the BFD sta‐
tus (possibly including reasons why BFD could not be enabled).
Physical_Port TABLE
A port within a Physical_Switch.
Summary:
vlan_bindings map of integer-Logical_Switch pairs, key
in range 0 to 4,095
acl_bindings map of integer-ACL pairs, key in range 0
to 4,095
vlan_stats map of integer-Logical_Binding_Stats
pairs, key in range 0 to 4,095
Identification:
name string
description string
Error Notification:
port_fault_status : invalid_vlan_map
none
port_fault_status : invalid_ACL_binding
none
port_fault_status : unspecified_fault
none
Common Column:
other_config map of string-string pairs
Details:
vlan_bindings: map of integer-Logical_Switch pairs, key in range 0 to
4,095
Identifies how VLANs on the physical port are bound to logical
switches. If, for example, the map contains a (VLAN, logical
switch) pair, a packet that arrives on the port in the VLAN is
considered to belong to the paired logical switch. A value of
zero in the VLAN field means that untagged traffic on the physi‐
cal port is mapped to the logical switch.
acl_bindings: map of integer-ACL pairs, key in range 0 to 4,095
Attach Access Control Lists (ACLs) to the physical port. The
column consists of a map of VLAN tags to ACLs. If the value of
the VLAN tag in the map is 0, this means that the ACL is associ‐
ated with the entire physical port. Non-zero values mean that
the ACL is to be applied only on packets carrying that VLAN tag
value. Switches will not necessarily support matching on the
VLAN tag for all ACLs, and unsupported ACL bindings will cause
errors to be reported. The binding of an ACL to a specific VLAN
and the binding of an ACL to the entire physical port should not
be combined on a single physical port. That is, a mix of zero
and non-zero keys in the map is not recommended.
vlan_stats: map of integer-Logical_Binding_Stats pairs, key in range 0
to 4,095
Statistics for VLANs bound to logical switches on the physical
port. An implementation that fully supports such statistics
would populate this column with a mapping for every VLAN that is
bound in vlan_bindings. An implementation that does not support
such statistics or only partially supports them would not popu‐
late this column or partially populate it, respectively. A value
of zero in the VLAN field refers to untagged traffic on the
physical port.
Identification:
name: string
Symbolic name for the port. The name ought to be unique within a
given Physical_Switch, but the database is not capable of en‐
forcing this.
description: string
An extended description for the port.
Error Notification:
An entry in this column indicates to the NVC that the physical port has
encountered a fault. The switch must clear this column when the error
has been cleared.
port_fault_status : invalid_vlan_map: none
Indicates that a VLAN-to-logical-switch mapping requested by the
controller could not be instantiated by the switch because of a
conflict with local configuration.
port_fault_status : invalid_ACL_binding: none
Indicates that an error has occurred in associating an ACL with
a port.
port_fault_status : unspecified_fault: none
Indicates that an error has occurred on the port but that no
more specific information is available.
Common Column:
The overall purpose of this column is described under Common Column at
the beginning of this document.
other_config: map of string-string pairs
Logical_Binding_Stats TABLE
Reports statistics for the Logical_Switch with which a VLAN on a Physi‐
cal_Port is associated.
Summary:
Statistics:
packets_from_local integer
bytes_from_local integer
packets_to_local integer
bytes_to_local integer
Details:
Statistics:
These statistics count only packets to which the binding applies.
packets_from_local: integer
Number of packets sent by the Physical_Switch.
bytes_from_local: integer
Number of bytes in packets sent by the Physical_Switch.
packets_to_local: integer
Number of packets received by the Physical_Switch.
bytes_to_local: integer
Number of bytes in packets received by the Physical_Switch.
Logical_Switch TABLE
A logical Ethernet switch, whose implementation may span physical and
virtual media, possibly crossing L3 domains via tunnels; a logical
layer-2 domain; an Ethernet broadcast domain.
Summary:
Per Logical-Switch Tunnel Key:
tunnel_key optional integer
Replication Mode:
replication_mode optional string, either service_node or
source_node
Identification:
name string (must be unique within table)
description string
Common Column:
other_config map of string-string pairs
Details:
Per Logical-Switch Tunnel Key:
Tunnel protocols tend to have a field that allows the tunnel to be par‐
titioned into sub-tunnels: VXLAN has a VNI, GRE and STT have a key,
CAPWAP has a WSI, and so on. We call these generically ``tunnel keys.’’
Given that one needs to use a tunnel key at all, there are at least two
reasonable ways to assign their values:
• Per Logical_Switch+Physical_Locator pair. That is, each
logical switch may be assigned a different tunnel key on
every Physical_Locator. This model is especially flexi‐
ble.
In this model, Physical_Locator carries the tunnel key.
Therefore, one Physical_Locator record will exist for
each logical switch carried at a given IP destination.
• Per Logical_Switch. That is, every tunnel associated with
a particular logical switch carries the same tunnel key,
regardless of the Physical_Locator to which the tunnel is
addressed. This model may ease switch implementation be‐
cause it imposes fewer requirements on the hardware data‐
path.
In this model, Logical_Switch carries the tunnel key.
Therefore, one Physical_Locator record will exist for
each IP destination.
tunnel_key: optional integer
This column is used only in the tunnel key per Logical_Switch
model (see above), because only in that model is there a tunnel
key associated with a logical switch.
For vxlan_over_ipv4 encapsulation, when the tunnel key per Logi‐
cal_Switch model is in use, this column is the VXLAN VNI that
identifies a logical switch. It must be in the range 0 to
16,777,215.
Replication Mode:
For handling L2 broadcast, multicast and unknown unicast traffic, pack‐
ets can be sent to all members of a logical switch referenced by a
physical switch. There are different modes to replicate the packets.
The default mode of replication is to send the traffic to a service
node, which can be a hypervisor, server or appliance, and let the ser‐
vice node handle replication to other transport nodes (hypervisors or
other VTEP physical switches). This mode is called service node repli‐
cation. An alternate mode of replication, called source node replica‐
tion involves the source node sending to all other transport nodes. Hy‐
pervisors are always responsible for doing their own replication for
locally attached VMs in both modes. Service node replication mode is
the default and considered a basic requirement because it only requires
sending the packet to a single transport node.
replication_mode: optional string, either service_node or source_node
This optional column defines the replication mode per Logi‐
cal_Switch. There are 2 valid values, service_node and
source_node. If the column is not set, the replication mode de‐
faults to service_node.
Identification:
name: string (must be unique within table)
Symbolic name for the logical switch.
description: string
An extended description for the logical switch, such as its
switch login banner.
Common Column:
The overall purpose of this column is described under Common Column at
the beginning of this document.
other_config: map of string-string pairs
Ucast_Macs_Local TABLE
Mapping of unicast MAC addresses to tunnels (physical locators). This
table is written by the HSC, so it contains the MAC addresses that have
been learned on physical ports by a VTEP.
Summary:
MAC string
logical_switch Logical_Switch
locator Physical_Locator
ipaddr string
Details:
MAC: string
A MAC address that has been learned by the VTEP.
logical_switch: Logical_Switch
The Logical switch to which this mapping applies.
locator: Physical_Locator
The physical locator to be used to reach this MAC address. In
this table, the physical locator will be one of the tunnel IP
addresses of the appropriate VTEP.
ipaddr: string
The IP address to which this MAC corresponds. Optional field for
the purpose of ARP supression.
Ucast_Macs_Remote TABLE
Mapping of unicast MAC addresses to tunnels (physical locators). This
table is written by the NVC, so it contains the MAC addresses that the
NVC has learned. These include VM MAC addresses, in which case the
physical locators will be hypervisor IP addresses. The NVC will also
report MACs that it has learned from other HSCs in the network, in
which case the physical locators will be tunnel IP addresses of the
corresponding VTEPs.
Summary:
MAC string
logical_switch Logical_Switch
locator Physical_Locator
ipaddr string
Details:
MAC: string
A MAC address that has been learned by the NVC.
logical_switch: Logical_Switch
The Logical switch to which this mapping applies.
locator: Physical_Locator
The physical locator to be used to reach this MAC address. In
this table, the physical locator will be either a hypervisor IP
address or a tunnel IP addresses of another VTEP.
ipaddr: string
The IP address to which this MAC corresponds. Optional field for
the purpose of ARP supression.
Mcast_Macs_Local TABLE
Mapping of multicast MAC addresses to tunnels (physical locators). This
table is written by the HSC, so it contains the MAC addresses that have
been learned on physical ports by a VTEP. These may be learned by IGMP
snooping, for example. This table also specifies how to handle unknown
unicast and broadcast packets.
Summary:
MAC string
logical_switch Logical_Switch
locator_set Physical_Locator_Set
ipaddr string
Details:
MAC: string
A MAC address that has been learned by the VTEP.
The keyword unknown-dst is used as a special ``Ethernet ad‐
dress’’ that indicates the locations to which packets in a logi‐
cal switch whose destination addresses do not otherwise appear
in Ucast_Macs_Local (for unicast addresses) or Mcast_Macs_Local
(for multicast addresses) should be sent.
logical_switch: Logical_Switch
The Logical switch to which this mapping applies.
locator_set: Physical_Locator_Set
The physical locator set to be used to reach this MAC address.
In this table, the physical locator set will be contain one or
more tunnel IP addresses of the appropriate VTEP(s).
ipaddr: string
The IP address to which this MAC corresponds. Optional field for
the purpose of ARP supression.
Mcast_Macs_Remote TABLE
Mapping of multicast MAC addresses to tunnels (physical locators). This
table is written by the NVC, so it contains the MAC addresses that the
NVC has learned. This table also specifies how to handle unknown uni‐
cast and broadcast packets.
Multicast packet replication may be handled by a service node, in which
case the physical locators will be IP addresses of service nodes. If
the VTEP supports replication onto multiple tunnels, using source node
replication, then this may be used to replicate directly onto VTEP-hy‐
pervisor or VTEP-VTEP tunnels.
Summary:
MAC string
logical_switch Logical_Switch
locator_set Physical_Locator_Set
ipaddr string
Details:
MAC: string
A MAC address that has been learned by the NVC.
The keyword unknown-dst is used as a special ``Ethernet ad‐
dress’’ that indicates the locations to which packets in a logi‐
cal switch whose destination addresses do not otherwise appear
in Ucast_Macs_Remote (for unicast addresses) or Mcast_Macs_Re‐
mote (for multicast addresses) should be sent.
logical_switch: Logical_Switch
The Logical switch to which this mapping applies.
locator_set: Physical_Locator_Set
The physical locator set to be used to reach this MAC address.
In this table, the physical locator set will be either a set of
service nodes when service node replication is used or the set
of transport nodes (defined as hypervisors or VTEPs) participat‐
ing in the associated logical switch, when source node replica‐
tion is used. When service node replication is used, the VTEP
should send packets to one member of the locator set that is
known to be healthy and reachable, which could be determined by
BFD. When source node replication is used, the VTEP should send
packets to all members of the locator set.
ipaddr: string
The IP address to which this MAC corresponds. Optional field for
the purpose of ARP supression.
Logical_Router TABLE
A logical router, or VRF. A logical router may be connected to one or
more logical switches. Subnet addresses and interface addresses may be
configured on the interfaces.
Summary:
switch_binding map of string-Logical_Switch pairs
static_routes map of string-string pairs
acl_binding map of string-ACL pairs
Identification:
name string (must be unique within table)
description string
Error Notification:
LR_fault_status : invalid_ACL_binding
none
LR_fault_status : unspecified_fault
none
Common Column:
other_config map of string-string pairs
Details:
switch_binding: map of string-Logical_Switch pairs
Maps from an IPv4 or IPv6 address prefix in CIDR notation to a
logical switch. Multiple prefixes may map to the same switch. By
writing a 32-bit (or 128-bit for v6) address with a /N prefix
length, both the router’s interface address and the subnet pre‐
fix can be configured. For example, 192.68.1.1/24 creates a /24
subnet for the logical switch attached to the interface and as‐
signs the address 192.68.1.1 to the router interface.
static_routes: map of string-string pairs
One or more static routes, mapping IP prefixes to next hop IP
addresses.
acl_binding: map of string-ACL pairs
Maps ACLs to logical router interfaces. The router interfaces
are indicated using IP address notation, and must be the same
interfaces created in the switch_binding column. For example, an
ACL could be associated with the logical router interface with
an address of 192.68.1.1 as defined in the example above.
Identification:
name: string (must be unique within table)
Symbolic name for the logical router.
description: string
An extended description for the logical router.
Error Notification:
An entry in this column indicates to the NVC that the HSC has encoun‐
tered a fault in configuring state related to the logical router.
LR_fault_status : invalid_ACL_binding: none
Indicates that an error has occurred in associating an ACL with
a logical router port.
LR_fault_status : unspecified_fault: none
Indicates that an error has occurred in configuring the logical
router but that no more specific information is available.
Common Column:
The overall purpose of this column is described under Common Column at
the beginning of this document.
other_config: map of string-string pairs
Arp_Sources_Local TABLE
MAC address to be used when a VTEP issues ARP requests on behalf of a
logical router.
A distributed logical router is implemented by a set of VTEPs (both
hardware VTEPs and vswitches). In order for a given VTEP to populate
the local ARP cache for a logical router, it issues ARP requests with a
source MAC address that is unique to the VTEP. A single per-VTEP MAC
can be re-used across all logical networks. This table contains the
MACs that are used by the VTEPs of a given HSC. The table provides the
mapping from MAC to physical locator for each VTEP so that replies to
the ARP requests can be sent back to the correct VTEP using the appro‐
priate physical locator.
Summary:
src_mac string
locator Physical_Locator
Details:
src_mac: string
The source MAC to be used by a given VTEP.
locator: Physical_Locator
The Physical_Locator to use for replies to ARP requests from
this MAC address.
Arp_Sources_Remote TABLE
MAC address to be used when a remote VTEP issues ARP requests on behalf
of a logical router.
This table is the remote counterpart of Arp_sources_local. The NVC
writes this table to notify the HSC of the MACs that will be used by
remote VTEPs when they issue ARP requests on behalf of a distributed
logical router.
Summary:
src_mac string
locator Physical_Locator
Details:
src_mac: string
The source MAC to be used by a given VTEP.
locator: Physical_Locator
The Physical_Locator to use for replies to ARP requests from
this MAC address.
Physical_Locator_Set TABLE
A set of one or more Physical_Locators.
This table exists only because OVSDB does not have a way to express the
type ``map from string to one or more Physical_Locator records.’’
Summary:
locators immutable set of 1 or more Physical_Loca‐
tors
Details:
locators: immutable set of 1 or more Physical_Locators
Physical_Locator TABLE
Identifies an endpoint to which logical switch traffic may be encapsu‐
lated and forwarded.
The vxlan_over_ipv4 encapsulation, the only encapsulation defined so
far, can use either tunnel key model described in the ``Per Logical-
Switch Tunnel Key’’ section in the Logical_Switch table. When the tun‐
nel key per Logical_Switch model is in use, the tunnel_key column in
the Logical_Switch table is filled with a VNI and the tunnel_key column
in this table is empty; in the key-per-tunnel model, the opposite is
true. The former model is older, and thus likely to be more widely sup‐
ported. See the ``Per Logical-Switch Tunnel Key’’ section in the Logi‐
cal_Switch table for further discussion of the model.
Summary:
encapsulation_type immutable string, must be vxlan_over_ipv4
dst_ip immutable string
tunnel_key optional integer
Details:
encapsulation_type: immutable string, must be vxlan_over_ipv4
The type of tunneling encapsulation.
dst_ip: immutable string
For vxlan_over_ipv4 encapsulation, the IPv4 address of the VXLAN
tunnel endpoint.
We expect that this column could be used for IPv4 or IPv6 ad‐
dresses in encapsulations to be introduced later.
tunnel_key: optional integer
This column is used only in the tunnel key per Logi‐
cal_Switch+Physical_Locator model (see above).
For vxlan_over_ipv4 encapsulation, when the Logical_Switch+Phys‐
ical_Locator model is in use, this column is the VXLAN VNI. It
must be in the range 0 to 16,777,215.
ACL_entry TABLE
Describes the individual entries that comprise an Access Control List.
Each entry in the table is a single rule to match on certain header
fields. While there are a large number of fields that can be matched
on, most hardware cannot match on arbitrary combinations of fields. It
is common to match on either L2 fields (described below in the L2 group
of columns) or L3/L4 fields (the L3/L4 group of columns) but not both.
The hardware switch controller may log an error if an ACL entry re‐
quires it to match on an incompatible mixture of fields.
Summary:
sequence integer
L2 fields:
source_mac optional string
dest_mac optional string
ethertype optional string
L3/L4 fields:
source_ip optional string
source_mask optional string
dest_ip optional string
dest_mask optional string
protocol optional integer
source_port_min optional integer
source_port_max optional integer
dest_port_min optional integer
dest_port_max optional integer
tcp_flags optional integer
tcp_flags_mask optional integer
icmp_type optional integer
icmp_code optional integer
direction string, either egress or ingress
action string, either deny or permit
Error Notification:
acle_fault_status : invalid_acl_entry
none
acle_fault_status : unspecified_fault
none
Details:
sequence: integer
The sequence number for the ACL entry for the purpose of order‐
ing entries in an ACL. Lower numbered entries are matched before
higher numbered entries.
L2 fields:
source_mac: optional string
Source MAC address, in the form xx:xx:xx:xx:xx:xx
dest_mac: optional string
Destination MAC address, in the form xx:xx:xx:xx:xx:xx
ethertype: optional string
Ethertype in hexadecimal, in the form 0xAAAA
L3/L4 fields:
source_ip: optional string
Source IP address, in the form xx.xx.xx.xx for IPv4 or appropri‐
ate colon-separated hexadecimal notation for IPv6.
source_mask: optional string
Mask that determines which bits of source_ip to match on, in the
form xx.xx.xx.xx for IPv4 or appropriate colon-separated hexa‐
decimal notation for IPv6.
dest_ip: optional string
Destination IP address, in the form xx.xx.xx.xx for IPv4 or ap‐
propriate colon-separated hexadecimal notation for IPv6.
dest_mask: optional string
Mask that determines which bits of dest_ip to match on, in the
form xx.xx.xx.xx for IPv4 or appropriate colon-separated hexa‐
decimal notation for IPv6.
protocol: optional integer
Protocol number in the IPv4 header, or value of the "next
header" field in the IPv6 header.
source_port_min: optional integer
Lower end of the range of source port values. The value speci‐
fied is included in the range.
source_port_max: optional integer
Upper end of the range of source port values. The value speci‐
fied is included in the range.
dest_port_min: optional integer
Lower end of the range of destination port values. The value
specified is included in the range.
dest_port_max: optional integer
Upper end of the range of destination port values. The value
specified is included in the range.
tcp_flags: optional integer
Integer representing the value of TCP flags to match. For exam‐
ple, the SYN flag is the second least significant bit in the TCP
flags. Hence a value of 2 would indicate that the "SYN" flag
should be set (assuming an appropriate mask).
tcp_flags_mask: optional integer
Integer representing the mask to apply when matching TCP flags.
For example, a value of 2 would imply that the "SYN" flag should
be matched and all other flags ignored.
icmp_type: optional integer
ICMP type to be matched.
icmp_code: optional integer
ICMP code to be matched.
direction: string, either egress or ingress
Direction of traffic to match on the specified port, either
"ingress" (toward the logical switch or router) or "egress"
(leaving the logical switch or router).
action: string, either deny or permit
Action to take for this rule, either "permit" or "deny".
Error Notification:
An entry in this column indicates to the NVC that the ACL could not be
configured as requested. The switch must clear this column when the er‐
ror has been cleared.
acle_fault_status : invalid_acl_entry: none
Indicates that an ACL entry requested by the controller could
not be instantiated by the switch, e.g. because it requires an
unsupported combination of fields to be matched.
acle_fault_status : unspecified_fault: none
Indicates that an error has occurred in configuring the ACL en‐
try but no more specific information is available.
ACL TABLE
Access Control List table. Each ACL is constructed as a set of entries
from the ACL_entry table. Packets that are not matched by any entry in
the ACL are allowed by default.
Summary:
acl_entries set of 1 or more ACL_entrys
acl_name string (must be unique within table)
Error Notification:
acl_fault_status : invalid_acl
none
acl_fault_status : resource_shortage
none
acl_fault_status : unspecified_fault
none
Details:
acl_entries: set of 1 or more ACL_entrys
A set of references to entries in the ACL_entry table.
acl_name: string (must be unique within table)
A human readable name for the ACL, which may (for example) be
displayed on the switch CLI.
Error Notification:
An entry in this column indicates to the NVC that the ACL could not be
configured as requested. The switch must clear this column when the er‐
ror has been cleared.
acl_fault_status : invalid_acl: none
Indicates that an ACL requested by the controller could not be
instantiated by the switch, e.g., because it requires an unsup‐
ported combination of fields to be matched.
acl_fault_status : resource_shortage: none
Indicates that an ACL requested by the controller could not be
instantiated by the switch due to a shortage of resources (e.g.
TCAM space).
acl_fault_status : unspecified_fault: none
Indicates that an error has occurred in configuring the ACL but
no more specific information is available.
Open vSwitch 3.4.1 DB Schema 1.7.0 vtep(5)