vtep
Section: Open vSwitch Manual (5)
Updated: DB Schema 1.7.0
Page Index
NAME
vtep - hardware_vtep database schema
This schema specifies relations that a VTEP can use to integrate physical ports into logical switches maintained by a network virtualization controller such as NSX46
Glossary:
-
- VTEP
-
VXLAN Tunnel End Point, an entity which originates and/or terminates VXLAN tunnels46
- HSC
-
Hardware Switch Controller46
- NVC
-
Network Virtualization Controller, e46g46 NSX46
- VRF
-
Virtual Routing and Forwarding instance46
Common Column
Some tables contain a column, named other_config46 This column has the same form and purpose each place that it appears, so we describe it here to save space later46
-
- other_config: map of string-string pairs
-
Key-value pairs for configuring rarely used or proprietary features46
-
Some tables do not have other_config column because no key-value pairs have yet been defined for them46
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 configuration46
-
Manager
- OVSDB management connection46
-
Physical_Switch
- A physical switch46
-
Tunnel
- A tunnel created by a physical switch46
-
Physical_Port
- A port within a physical switch46
-
Logical_Binding_Stats
- Statistics for a VLAN on a physical port bound to a logical network46
-
Logical_Switch
- A layer-2 domain46
-
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 router46
-
Arp_Sources_Local
- ARP source addresses for logical routers
-
Arp_Sources_Remote
- ARP source addresses for logical routers
-
Physical_Locator_Set
- Physical_Locator_Set configuration46
-
Physical_Locator
- Physical_Locator configuration46
-
ACL_entry
- ACL_entry configuration46
-
ACL
- ACL configuration46
Global TABLE
Top-level configuration for a hardware VTEP46 There must be exactly one record in the Global table46
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 VTEP46
-
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 itself46 In another possible implementation, a server or a VM presents a VTEP schema front-end interface to one or more physical switches, presumably communicating with those physical switches over a proprietary protocol46 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 switches46
Database Configuration:
These columns primarily configure the database server (ovsdb-server), not the hardware VTEP itself46
- 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 connection should be configured46 See the Manager table for more information46
Common Column:
The overall purpose of this column is described under Common
Column at the beginning of this document46
- other_config: map of string-string pairs
-
Manager TABLE
Configuration for a database connection to an Open vSwitch Database (OVSDB) client46
The database server can initiate and maintain active connections to remote clients46 It can also listen for database connections46
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 managers46
-
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 library) or an IP address46
-
SSL key and certificate configuration happens outside the database46
- tcp:host[:port]
-
The specified TCP port (default: 6640) on the given host, which can either be a DNS name (if built with unbound library) or an IP address46
- pssl:[port][:host]
-
Listens for SSL connections on the specified TCP port (default: 6640)46 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 resolved or specified local IP address46
- ptcp:[port][:host]
-
Listens for connections on the specified TCP port (default: 6640)46 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 resolved or specified local IP address46
Client Failure Detection and Handling:
- max_backoff: optional integer, at least 1,000
-
Maximum number of milliseconds to wait between connection attempts46 Default is implementation-specific46
- inactivity_probe: optional integer
-
Maximum number of milliseconds of idle time on connection to the client before sending an inactivity probe message46 If the Open vSwitch database does not communicate with the client for the specified number of seconds, it will send a probe46 If a response is not received for the same additional amount of time, the database server assumes the connection has been broken and attempts to reconnect46 Default is implementation-specific46 A value of 0 disables inactivity probes46
Status:
- is_connected: boolean
-
true if currently connected to this manager, false otherwise46
- status : last_error: optional string
-
A human-readable description of the last error on the connection to the manager; i46e46 strerror(errno)46 This key will exist only if an error has occurred46
- status : state: optional string, one of ACTIVE, BACKOFF, CONNECTING, IDLE, or VOID
-
The state of the connection to the manager:
-
- VOID
-
Connection is disabled46
- BACKOFF
-
Attempting to reconnect at an increasing period46
- CONNECTING
-
Attempting to connect46
- ACTIVE
-
Connected, remote host responsive46
- IDLE
-
Connection is idle46 Waiting for response to keep-alive46
-
These values may change in the future46 They are provided only for human consumption46
- status : sec_since_connect: optional string, containing an integer, at least 0
-
The amount of time since this manager last successfully connected to the database (in seconds)46 Value is empty if manager has never successfully connected46
- 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)46 Value is empty if manager has never disconnected46
- status : locks_held: optional string
-
Space-separated list of the names of OVSDB locks that the connection holds46 Omitted if the connection does not hold any locks46
- status : locks_waiting: optional string
-
Space-separated list of the names of OVSDB locks that the connection is currently waiting to acquire46 Omitted if the connection is not waiting for any locks46
- status : locks_lost: optional string
-
Space-separated list of the names of OVSDB locks that the connection has had stolen by another OVSDB client46 Omitted if no locks have been stolen from this connection46
- status : n_connections: optional string, containing an integer, at least 2
-
When target specifies a connection method that listens for inbound connections (e46g46 ptcp: or pssl:) and more than one connection is actually active, the value is the number of active connections46 Otherwise, this key-value pair is omitted46
-
When multiple connections are active, status columns and key-value pairs (other than this one) report the status of one arbitrarily chosen connection46
Connection Parameters:
Additional configuration for a connection between the manager and the database server46
- 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 header46 DSCP provides a mechanism to classify the network traffic and provide Quality of Service (QoS) on IP networks46 The DSCP value specified here is used when establishing the connection between the manager and the database server46 If no value is specified, a default value of 48 is chosen46 Valid DSCP values must be in the range 0 to 6346
Physical_Switch TABLE
A physical switch that implements a VTEP46
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 switch46
- tunnels: set of Tunnels
-
Tunnels created by this switch as instructed by the NVC46
Network Status:
- management_ips: set of strings
-
IPv4 or IPv6 addresses at which the switch may be contacted for management purposes46
- tunnel_ips: set of strings
-
IPv4 or IPv6 addresses on which the switch may originate or terminate tunnels46
-
This column is intended to allow a Manager to determine the Physical_Switch that terminates the tunnel represented by a Physical_Locator46
Identification:
- name: string (must be unique within table)
-
Symbolic name for the switch, such as its hostname46
- description: string
-
An extended description for the switch, such as its switch login banner46
Error Notification:
An entry in this column indicates to the NVC that this switch has encountered a fault46 The switch must clear this column when the fault has been cleared46
- 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 resources46
- switch_fault_status : tunnel_exhaustion: none
-
Indicates that the switch has been unable to create tunnels requested by the NVC due to lack of resources46
- 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 configurations or a lack of hardware resources46
- 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 resources46
- 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 resources46
- switch_fault_status : lr_support_fault: none
-
Indicates that the switch does not support logical routing46
- switch_fault_status : unspecified_fault: none
-
Indicates that an error has occurred in the switch but that no more specific information is available46
- 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 mode46 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 context for46 An NVC that observes this error should take appropriate action (for example reverting the logical switch to service node replication mode)46 It is recommended that an NVC be proactive and test for support of source node replication by using a test logical switch on vtep physical switch nodes and then trying to change the replication mode to source node on this logical switch, checking for error46 The NVC could remember this capability per vtep physical switch46 Using mixed replication modes on a given logical switch is not recommended46 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 supported46
Common Column:
The overall purpose of this column is described under Common
Column at the beginning of this document46
- other_config: map of string-string pairs
-
Tunnel TABLE
A tunnel created by a Physical_Switch46
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 switch46
- remote: Physical_Locator
-
Tunnel end-point remote to the physical switch46
Bidirectional Forwarding Detection (BFD):
BFD, defined in RFC 5880, allows point to point detection of connectivity failures by occasional transmission of BFD control messages46 VTEPs are expected to implement BFD46
BFD operates by regularly transmitting BFD control messages at a rate negotiated independently in each direction46 Each endpoint specifies the rate at which it expects to receive control messages, and the rate at which it's willing to transmit them46 An endpoint which fails to receive BFD control messages for a period of three times the expected reception rate will signal a connectivity fault46 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 transmits46
A hardware VTEP is expected to use BFD to determine reachability of devices at the end of the tunnels with which it exchanges data46 This can enable the VTEP to choose a functioning service node among a set of service nodes providing high availability46 It also enables the NVC to report the health status of tunnels46
In many cases the BFD peer of a hardware VTEP will be an Open vSwitch instance46 The Open vSwitch implementation of BFD aims to comply faithfully with the requirements put forth in RFC 588046 Open vSwitch does not implement the optional Authentication or ``Echo Mode'' features46
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 tunnel46
- 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 packets46 The default is 00:23:20:00:00:0146
- 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 packets46 The default is 1694625446146046
BFD Remote Configuration:
The bfd_config_remote column is the remote counterpart of the bfd_config_local column46 The NVC writes the key-value pairs in this column46
- 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 packets46 The default is 00:23:20:00:00:0146
- bfd_config_remote : bfd_dst_ip: optional string
-
Set to an IPv4 address to set the IP address used as destination for transmitted BFD packets46 The default is 1694625446146146
BFD Parameters:
The NVC sets up key-value pairs in the bfd_params column to enable and configure BFD46
- bfd_params : enable: optional string, either true or false
-
True to enable BFD on this Tunnel46 If not specified, BFD will not be enabled by default46
- bfd_params : min_rx: optional string, containing an integer, at least 1
-
The shortest interval, in milliseconds, at which this BFD session offers to receive BFD control messages46 The remote endpoint may choose to send messages at a slower rate46 Defaults to 100046
- bfd_params : min_tx: optional string, containing an integer, at least 1
-
The shortest interval, in milliseconds, at which this BFD session is willing to transmit BFD control messages46 Messages will actually be transmitted at a slower rate if the remote endpoint is not willing to receive as quickly as specified46 Defaults to 10046
- 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_rx46 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 tunnel46 This feature may be disabled by setting a value of 046 This feature is reset whenever bfd_params:decay_min_rx or bfd_params:min_rx changes46
- 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/O46 BFD control packets are still transmitted and received46 At least one BFD control packet must be received every 100 * bfd_params:min_rx amount of time46 Otherwise, even if traffic is received, the bfd_params:forwarding will be false46
- 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 monitored46 The typical underlying reason is ``concatenated path down,'' that is, that connectivity beyond the local system is down46 Defaults to false46
- bfd_params : check_tnl_key: optional string, either true or false
-
Set to true to make BFD accept only control messages with a tunnel key of zero46 By default, BFD accepts control messages with any tunnel key46
BFD Status:
The VTEP sets key-value pairs in the bfd_status column to report the status of BFD on this tunnel46 When BFD is not enabled, with bfd_params:enable, the HSC clears all key-value pairs from bfd_status46
- bfd_status : enabled: optional string, either true or false
-
Set to true if the BFD session has been successfully enabled46 Set to false if the VTEP cannot support BFD or has insufficient resources to enable BFD on this tunnel46 The NVC will disable the BFD monitoring on the other side of the tunnel once this value is set to false46
- bfd_status : state: optional string, one of admin_down, down, init, or up
-
Reports the state of the BFD session46 The BFD session is fully healthy and negotiated if UP46
- bfd_status : forwarding: optional string, either true or false
-
Reports whether the BFD session believes this Tunnel may be used to forward traffic46 Typically this means the local session is signaling UP, and the remote system isn't signaling a problem such as concatenated path down46
- bfd_status : diagnostic: optional string
-
A diagnostic code specifying the local system's reason for the last change in session state46 The error messages are defined in section 4461 of [RFC 5880]46
- bfd_status : remote_state: optional string, one of admin_down, down, init, or up
-
Reports the state of the remote endpoint's BFD session46
- bfd_status : remote_diagnostic: optional string
-
A diagnostic code specifying the remote system's reason for the last change in session state46 The error messages are defined in section 4461 of [RFC 5880]46
- bfd_status : info: optional string
-
A short message providing further information about the BFD status (possibly including reasons why BFD could not be enabled)46
Physical_Port TABLE
A port within a Physical_Switch46
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 switches46 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 switch46 A value of zero in the VLAN field means that untagged traffic on the physical port is mapped to the logical switch46
- acl_bindings: map of integer-ACL pairs, key in range 0 to 4,095
-
Attach Access Control Lists (ACLs) to the physical port46 The column consists of a map of VLAN tags to ACLs46 If the value of the VLAN tag in the map is 0, this means that the ACL is associated with the entire physical port46 Non-zero values mean that the ACL is to be applied only on packets carrying that VLAN tag value46 Switches will not necessarily support matching on the VLAN tag for all ACLs, and unsupported ACL bindings will cause errors to be reported46 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 port46 That is, a mix of zero and non-zero keys in the map is not recommended46
- 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 port46 An implementation that fully supports such statistics would populate this column with a mapping for every VLAN that is bound in vlan_bindings46 An implementation that does not support such statistics or only partially supports them would not populate this column or partially populate it, respectively46 A value of zero in the VLAN field refers to untagged traffic on the physical port46
Identification:
- name: string
-
Symbolic name for the port46 The name ought to be unique within a given Physical_Switch, but the database is not capable of enforcing this46
- description: string
-
An extended description for the port46
Error Notification:
An entry in this column indicates to the NVC that the physical port has encountered a fault46 The switch must clear this column when the error has been cleared46
- 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 configuration46
- port_fault_status : invalid_ACL_binding: none
-
Indicates that an error has occurred in associating an ACL with a port46
- port_fault_status : unspecified_fault: none
-
Indicates that an error has occurred on the port but that no more specific information is available46
Common Column:
The overall purpose of this column is described under Common
Column at the beginning of this document46
- other_config: map of string-string pairs
-
Logical_Binding_Stats TABLE
Reports statistics for the Logical_Switch with which a VLAN on a Physical_Port is associated46
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 applies46
- packets_from_local: integer
-
Number of packets sent by the Physical_Switch46
- bytes_from_local: integer
-
Number of bytes in packets sent by the Physical_Switch46
- packets_to_local: integer
-
Number of packets received by the Physical_Switch46
- bytes_to_local: integer
-
Number of bytes in packets received by the Physical_Switch46
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 domain46
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 partitioned into sub-tunnels: VXLAN has a VNI, GRE and STT have a key, CAPWAP has a WSI, and so on46 We call these generically ``tunnel keys46'' 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 pair46 That is, each logical switch may be assigned a different tunnel key on every Physical_Locator46 This model is especially flexible46
-
In this model, Physical_Locator carries the tunnel key46 Therefore, one Physical_Locator record will exist for each logical switch carried at a given IP destination46
- •
-
Per Logical_Switch46 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 addressed46 This model may ease switch implementation because it imposes fewer requirements on the hardware datapath46
-
In this model, Logical_Switch carries the tunnel key46 Therefore, one Physical_Locator record will exist for each IP destination46
- 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 switch46
-
For vxlan_over_ipv4 encapsulation, when the tunnel key per Logical_Switch model is in use, this column is the VXLAN VNI that identifies a logical switch46 It must be in the range 0 to 16,777,21546
Replication Mode:
For handling L2 broadcast, multicast and unknown unicast traffic, packets can be sent to all members of a logical switch referenced by a physical switch46 There are different modes to replicate the packets46 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 service node handle replication to other transport nodes (hypervisors or other VTEP physical switches)46 This mode is called service node replication46 An alternate mode of replication, called source node replication involves the source node sending to all other transport nodes46 Hypervisors are always responsible for doing their own replication for locally attached VMs in both modes46 Service node replication mode is the default and considered a basic requirement because it only requires sending the packet to a single transport node46
- replication_mode: optional string, either service_node or source_node
-
This optional column defines the replication mode per Logical_Switch46 There are 2 valid values, service_node and source_node46 If the column is not set, the replication mode defaults to service_node46
Identification:
- name: string (must be unique within table)
-
Symbolic name for the logical switch46
- description: string
-
An extended description for the logical switch, such as its switch login banner46
Common Column:
The overall purpose of this column is described under Common
Column at the beginning of this document46
- other_config: map of string-string pairs
-
Ucast_Macs_Local TABLE
Mapping of unicast MAC addresses to tunnels (physical locators)46 This table is written by the HSC, so it contains the MAC addresses that have been learned on physical ports by a VTEP46
Summary:
-
MAC
- string
-
logical_switch
Logical_Switch
-
locator
Physical_Locator
-
ipaddr
- string
Details:
- MAC: string
-
A MAC address that has been learned by the VTEP46
- logical_switch: Logical_Switch
-
The Logical switch to which this mapping applies46
- locator: Physical_Locator
-
The physical locator to be used to reach this MAC address46 In this table, the physical locator will be one of the tunnel IP addresses of the appropriate VTEP46
- ipaddr: string
-
The IP address to which this MAC corresponds46 Optional field for the purpose of ARP supression46
Ucast_Macs_Remote TABLE
Mapping of unicast MAC addresses to tunnels (physical locators)46 This table is written by the NVC, so it contains the MAC addresses that the NVC has learned46 These include VM MAC addresses, in which case the physical locators will be hypervisor IP addresses46 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 VTEPs46
Summary:
-
MAC
- string
-
logical_switch
Logical_Switch
-
locator
Physical_Locator
-
ipaddr
- string
Details:
- MAC: string
-
A MAC address that has been learned by the NVC46
- logical_switch: Logical_Switch
-
The Logical switch to which this mapping applies46
- locator: Physical_Locator
-
The physical locator to be used to reach this MAC address46 In this table, the physical locator will be either a hypervisor IP address or a tunnel IP addresses of another VTEP46
- ipaddr: string
-
The IP address to which this MAC corresponds46 Optional field for the purpose of ARP supression46
Mcast_Macs_Local TABLE
Mapping of multicast MAC addresses to tunnels (physical locators)46 This table is written by the HSC, so it contains the MAC addresses that have been learned on physical ports by a VTEP46 These may be learned by IGMP snooping, for example46 This table also specifies how to handle unknown unicast and broadcast packets46
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 VTEP46
-
The keyword unknown-dst is used as a special ``Ethernet address'' that indicates the locations to which packets in a logical switch whose destination addresses do not otherwise appear in Ucast_Macs_Local (for unicast addresses) or Mcast_Macs_Local (for multicast addresses) should be sent46
- logical_switch: Logical_Switch
-
The Logical switch to which this mapping applies46
- locator_set: Physical_Locator_Set
-
The physical locator set to be used to reach this MAC address46 In this table, the physical locator set will be contain one or more tunnel IP addresses of the appropriate VTEP(s)46
- ipaddr: string
-
The IP address to which this MAC corresponds46 Optional field for the purpose of ARP supression46
Mcast_Macs_Remote TABLE
Mapping of multicast MAC addresses to tunnels (physical locators)46 This table is written by the NVC, so it contains the MAC addresses that the NVC has learned46 This table also specifies how to handle unknown unicast and broadcast packets46
Multicast packet replication may be handled by a service node, in which case the physical locators will be IP addresses of service nodes46 If the VTEP supports replication onto multiple tunnels, using source node replication, then this may be used to replicate directly onto VTEP-hypervisor or VTEP-VTEP tunnels46
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 NVC46
-
The keyword unknown-dst is used as a special ``Ethernet address'' that indicates the locations to which packets in a logical switch whose destination addresses do not otherwise appear in Ucast_Macs_Remote (for unicast addresses) or Mcast_Macs_Remote (for multicast addresses) should be sent46
- logical_switch: Logical_Switch
-
The Logical switch to which this mapping applies46
- locator_set: Physical_Locator_Set
-
The physical locator set to be used to reach this MAC address46 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) participating in the associated logical switch, when source node replication is used46 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 BFD46 When source node replication is used, the VTEP should send packets to all members of the locator set46
- ipaddr: string
-
The IP address to which this MAC corresponds46 Optional field for the purpose of ARP supression46
Logical_Router TABLE
A logical router, or VRF46 A logical router may be connected to one or more logical switches46 Subnet addresses and interface addresses may be configured on the interfaces46
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 switch46 Multiple prefixes may map to the same switch46 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 prefix can be configured46 For example, 1924668461461/24 creates a /24 subnet for the logical switch attached to the interface and assigns the address 1924668461461 to the router interface46
- static_routes: map of string-string pairs
-
One or more static routes, mapping IP prefixes to next hop IP addresses46
- acl_binding: map of string-ACL pairs
-
Maps ACLs to logical router interfaces46 The router interfaces are indicated using IP address notation, and must be the same interfaces created in the switch_binding column46 For example, an ACL could be associated with the logical router interface with an address of 1924668461461 as defined in the example above46
Identification:
- name: string (must be unique within table)
-
Symbolic name for the logical router46
- description: string
-
An extended description for the logical router46
Error Notification:
An entry in this column indicates to the NVC that the HSC has encountered a fault in configuring state related to the logical router46
- LR_fault_status : invalid_ACL_binding: none
-
Indicates that an error has occurred in associating an ACL with a logical router port46
- LR_fault_status : unspecified_fault: none
-
Indicates that an error has occurred in configuring the logical router but that no more specific information is available46
Common Column:
The overall purpose of this column is described under Common
Column at the beginning of this document46
- 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 router46
A distributed logical router is implemented by a set of VTEPs (both hardware VTEPs and vswitches)46 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 VTEP46 A single per-VTEP MAC can be re-used across all logical networks46 This table contains the MACs that are used by the VTEPs of a given HSC46 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 appropriate physical locator46
Summary:
-
src_mac
- string
-
locator
Physical_Locator
Details:
- src_mac: string
-
- The source MAC to be used by a given VTEP46
- locator: Physical_Locator
-
The Physical_Locator to use for replies to ARP requests from this MAC address46
Arp_Sources_Remote TABLE
MAC address to be used when a remote VTEP issues ARP requests on behalf of a logical router46
This table is the remote counterpart of Arp_sources_local46 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 router46
Summary:
-
src_mac
- string
-
locator
Physical_Locator
Details:
- src_mac: string
-
- The source MAC to be used by a given VTEP46
- locator: Physical_Locator
-
The Physical_Locator to use for replies to ARP requests from this MAC address46
Physical_Locator_Set TABLE
A set of one or more Physical_Locators46
This table exists only because OVSDB does not have a way to express the type ``map from string to one or more Physical_Locator records46''
Summary:
-
locators
- immutable set of 1 or more Physical_Locators
Details:
- locators: immutable set of 1 or more Physical_Locators
-
Physical_Locator TABLE
Identifies an endpoint to which logical switch traffic may be encapsulated and forwarded46
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 table46 When the tunnel 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 true46 The former model is older, and thus likely to be more widely supported46 See the ``Per Logical-Switch Tunnel Key'' section in the Logical_Switch table for further discussion of the model46
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 encapsulation46
- dst_ip: immutable string
-
For vxlan_over_ipv4 encapsulation, the IPv4 address of the VXLAN tunnel endpoint46
-
We expect that this column could be used for IPv4 or IPv6 addresses in encapsulations to be introduced later46
- tunnel_key: optional integer
-
This column is used only in the tunnel key per Logical_Switch+Physical_Locator model (see above)46
-
For vxlan_over_ipv4 encapsulation, when the Logical_Switch+Physical_Locator model is in use, this column is the VXLAN VNI46 It must be in the range 0 to 16,777,21546
ACL_entry TABLE
Describes the individual entries that comprise an Access Control List46
Each entry in the table is a single rule to match on certain header fields46 While there are a large number of fields that can be matched on, most hardware cannot match on arbitrary combinations of fields46 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 both46 The hardware switch controller may log an error if an ACL entry requires it to match on an incompatible mixture of fields46
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 ordering entries in an ACL46 Lower numbered entries are matched before higher numbered entries46
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 xx46xx46xx46xx for IPv4 or appropriate colon-separated hexadecimal notation for IPv646
- source_mask: optional string
-
Mask that determines which bits of source_ip to match on, in the form xx46xx46xx46xx for IPv4 or appropriate colon-separated hexadecimal notation for IPv646
- dest_ip: optional string
-
Destination IP address, in the form xx46xx46xx46xx for IPv4 or appropriate colon-separated hexadecimal notation for IPv646
- dest_mask: optional string
-
Mask that determines which bits of dest_ip to match on, in the form xx46xx46xx46xx for IPv4 or appropriate colon-separated hexadecimal notation for IPv646
- protocol: optional integer
-
Protocol number in the IPv4 header, or value of the "next header" field in the IPv6 header46
- source_port_min: optional integer
-
Lower end of the range of source port values46 The value specified is included in the range46
- source_port_max: optional integer
-
Upper end of the range of source port values46 The value specified is included in the range46
- dest_port_min: optional integer
-
Lower end of the range of destination port values46 The value specified is included in the range46
- dest_port_max: optional integer
-
Upper end of the range of destination port values46 The value specified is included in the range46
- tcp_flags: optional integer
-
Integer representing the value of TCP flags to match46 For example, the SYN flag is the second least significant bit in the TCP flags46 Hence a value of 2 would indicate that the "SYN" flag should be set (assuming an appropriate mask)46
- tcp_flags_mask: optional integer
-
Integer representing the mask to apply when matching TCP flags46 For example, a value of 2 would imply that the "SYN" flag should be matched and all other flags ignored46
- icmp_type: optional integer
-
ICMP type to be matched46
- icmp_code: optional integer
-
ICMP code to be matched46
- 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)46
- action: string, either deny or permit
-
Action to take for this rule, either "permit" or "deny"46
Error Notification:
An entry in this column indicates to the NVC that the ACL could not be configured as requested46 The switch must clear this column when the error has been cleared46
- acle_fault_status : invalid_acl_entry: none
-
Indicates that an ACL entry requested by the controller could not be instantiated by the switch, e46g46 because it requires an unsupported combination of fields to be matched46
- acle_fault_status : unspecified_fault: none
-
Indicates that an error has occurred in configuring the ACL entry but no more specific information is available46
ACL TABLE
Access Control List table46 Each ACL is constructed as a set of entries from the ACL_entry table46 Packets that are not matched by any entry in the ACL are allowed by default46
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 table46
- acl_name: string (must be unique within table)
-
A human readable name for the ACL, which may (for example) be displayed on the switch CLI46
Error Notification:
An entry in this column indicates to the NVC that the ACL could not be configured as requested46 The switch must clear this column when the error has been cleared46
- acl_fault_status : invalid_acl: none
-
Indicates that an ACL requested by the controller could not be instantiated by the switch, e46g46, because it requires an unsupported combination of fields to be matched46
- 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 (e46g46 TCAM space)46
- acl_fault_status : unspecified_fault: none
-
Indicates that an error has occurred in configuring the ACL but no more specific information is available46