bridge

link

- Bridge port.

fdb

- Forwarding Database entry.

mdb

- Multicast group database entry.

vlan

- VLAN filter list.

Specifies the action to perform on the object. The set of possible actions depends on the object type. As a rule, it is possible to add, delete and show (or list ) objects, but some objects do not allow all of these operations or have some additional commands. The help command is available for all objects. It prints out a list of available commands and argument syntax conventions.

If no command is given, some default command is assumed. Usually it is list or, if the objects of this class cannot be listed, help.

dev NAME

interface name of the bridge port

cost COST

the STP path cost of the specified port.

priority PRIO

the STP port priority. The priority value is an unsigned 8-bit quantity (number between 0 and 255). This metric is used in the designated port an droot port selectio algorithms.

state STATE

the operation state of the port. This is primarily used by user space STP/RSTP implementation. One may enter a lowercased port state name, or one of the numbers below. Negative inputs are ignored, and unrecognized names return an error.

0 - port is DISABLED. Make this port completely inactive.

1 - STP LISTENING state. Only valid if STP is enabled on the bridge. In this state the port listens for STP BPDUs and drops all other traffic frames.

2 - STP LEARNING state. Only valid if STP is enabled on the bridge. In this state the port will accept traffic only for the purpose of updating MAC address tables.

3 - STP FORWARDING state. Port is fully active.

4 - STP BLOCKING state. Only valid if STP is enabled on the bridge. This state is used during the STP election process. In this state, port will only process STP BPDUs.

guard on or guard off

Controls whether STP BPDUs will be processed by the bridge port. By default, the flag is turned off allowed BPDU processing. Turning this flag on will cause the port to stop processing STP BPDUs.

hairpin on or hairpin off

Controls whether traffic may be send back out of the port on which it was received. By default, this flag is turned off and the bridge will not forward traffic back out of the receiving port.

fastleave on or fastleave off

This flag allows the bridge to immediately stop multicast traffic on a port that receives IGMP Leave message. It is only used with IGMP snooping is enabled on the bridge. By default the flag is off.

root_block on or root_block off

Controls whether a given port is allowed to become root port or not. Only used when STP is enabled on the bridge. By default the flag is off.

learning on or learning off

Controls whether a given port will learn MAC addresses from received traffic or not. If learning if off, the bridge will end up flooding any traffic for which it has no FDB entry. By default this flag is on.

learning_sync on or learning_sync off

Controls whether a given port will sync MAC addresses learned on device port to bridge FDB.

flood on or flood off

Controls whether a given port will flood unicast traffic for which there is no FDB entry. By default this flag is on.

hwmode

Some network interface cards support HW bridge functionality and they may be configured in different modes. Currently support modes are:

vepa - Data sent between HW ports is sent on the wire to the external switch.

veb - bridging happens in hardware.

mcast_flood on or mcast_flood off

Controls whether a given port will flood multicast traffic for which there is no MDB entry. By default this flag is on.

mcast_to_unicast on or mcast_to_unicast off

Controls whether a given port will replicate packets using unicast instead of multicast. By default this flag is off.

neigh_suppress on or neigh_suppress off

Controls whether neigh discovery (arp and nd) proxy and suppression is enabled on the port. By default this flag is off.

vlan_tunnel on or vlan_tunnel off

Controls whether vlan to tunnel mapping is enabled on the port. By default this flag is off.

isolated on or isolated off

Controls whether a given port will be isolated, which means it will be able to communicate with non-isolated ports only.  By default this flag is off.

backup_port DEVICE

If the port loses carrier all traffic will be redirected to the configured backup port

nobackup_port

Removes the currently configured backup port

self

link setting is configured on specified physical device

master

link setting is configured on the software bridge (default)

-t, -timestamp

display current time when using monitor option.

This command displays the current bridge port configuration and flags.

This command creates a new fdb entry.

LLADDR

the Ethernet MAC address.

dev DEV

the interface to which this address is associated.

local - is a local permanent fdb entry

static - is a static (no arp) fdb entry

dynamic - is a dynamic reachable age-able fdb entry

self - the address is associated with the port drivers fdb. Usually hardware.

master - the address is associated with master devices fdb. Usually software (default).

router - the destination address is associated with a router. Valid if the referenced device is a VXLAN type device and has route shortcircuit enabled.

use - the address is in use. User space can use this option to indicate to the kernel that the fdb entry is in use.

extern_learn - this entry was learned externally. This option can be used to indicate to the kernel that an entry was hardware or user-space controller learnt dynamic entry. Kernel will not age such an entry.

sticky - this entry will not change its port due to learning.

The next command line parameters apply only when the specified device DEV is of type VXLAN.

dst IPADDR

the IP address of the destination VXLAN tunnel endpoint where the Ethernet MAC ADDRESS resides.

src_vni SRC VNI

the src VNI Network Identifier (or VXLAN Segment ID) this entry belongs to. Used only when the vxlan device is in external or collect metadata mode. If omitted the value specified at vxlan device creation will be used.

vni VNI

the VXLAN VNI Network Identifier (or VXLAN Segment ID) to use to connect to the remote VXLAN tunnel endpoint. If omitted the value specified at vxlan device creation will be used.

port PORT

the UDP destination PORT number to use to connect to the remote VXLAN tunnel endpoint. If omitted the default value is used.

via DEVICE

device name of the outgoing interface for the VXLAN device driver to reach the remote VXLAN tunnel endpoint.

This command adds a new fdb entry with an already known LLADDR. Valid only for multicast link layer addresses. The command adds support for broadcast and multicast Ethernet MAC addresses. The Ethernet MAC address is added multiple times into the forwarding database and the vxlan device driver sends a copy of the data packet to each entry found.

The arguments are the same as with bridge fdb add.

This command removes an existing fdb entry.

The arguments are the same as with bridge fdb add.

If no matching entry is found, a new one will be created instead.

The arguments are the same as with bridge fdb add.

This command displays the current forwarding table.

With the -statistics option, the command becomes verbose. It prints out the last updated and last used time for each entry.

This command creates a new mdb entry.

dev DEV

the interface where this group address is associated.

port PORT

the port whose link is known to have members of this multicast group.

grp GROUP

the IP multicast group address whose members reside on the link connected to the port.

permanent - the mdb entry is permanent

temp - the mdb entry is temporary (default)

vid VID

the VLAN ID which is known to have members of this multicast group.

This command removes an existing mdb entry.

The arguments are the same as with bridge mdb add.

This command displays the current multicast group membership table. The table is populated by IGMP and MLD snooping in the bridge driver automatically. It can be altered by bridge mdb add and bridge mdb del commands manually too.

dev DEV

the interface only whose entries should be listed. Default is to list all bridge interfaces.

With the -details option, the command becomes verbose. It prints out the ports known to have a connected router.

With the -statistics option, the command displays timer values for mdb and router port entries.

This command creates a new vlan filter entry.

dev NAME

the interface with which this vlan is associated.

vid VID

the VLAN ID that identifies the vlan.

tunnel_info TUNNEL_ID

the TUNNEL ID that maps to this vlan. The tunnel id is set in dst_metadata for every packet that belongs to this vlan (applicable to bridge ports with vlan_tunnel flag set).

pvid

the vlan specified is to be considered a PVID at ingress. Any untagged frames will be assigned to this VLAN.

untagged

the vlan specified is to be treated as untagged on egress.

self

the vlan is configured on the specified physical device. Required if the device is the bridge device.

master

the vlan is configured on the software bridge (default).

This command removes an existing vlan filter entry.

The arguments are the same as with bridge vlan add. The pvid and untagged flags are ignored.

This command displays the current VLAN filter table.

With the -statistics option, the command displays per-vlan traffic statistics.

This command displays the current vlan tunnel info mapping.