OBJECT¶

link

- Bridge port.

fdb

- Forwarding Database entry.

mdb

- Multicast group database entry.

vlan

- VLAN filter list.

COMMAND¶

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.

bridge link set - set bridge specific attributes on a port¶

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. The following is a list of valid values:

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

1 - STP LISTENING state. Only valid if STP is enabled on the brige. In this state the port for list for STP BPDUs and drop all other traffic.

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 adress 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 BPUDs 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.

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.

bridge link show - list bridge port configuration.¶

This command displays the current bridge port configuration and flags.

bridge fdb add - add a new fdb entry¶

This command creates a new fdb entry.

LLADDR

the Ethernet MAC address.

dev DEV

the interface to which this address is associated.

self - the address is associated with a software fdb (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.

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.

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.

bridge fdb append - append a forwarding database entry¶

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,

bridge fdb delete - delete a forwarding database entry¶

This command removes an existing fdb entry.

The arguments are the same as with bridge fdb add.

bridge fdb replace - replace a forwarding database entry¶

This command replaces an already present fdb entry.

The arguments are the same as with bridge fdb add,

bridge fdb show - list forwarding entries.¶

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.

bridge mdb add - add a new multicast group database 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)

bridge mdb delete - delete a multicast group database entry¶

This command removes an existing mdb entry.

The arguments are the same as with bridge mdb add.

bridge mdb show - list multicast group database entries¶

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.

bridge vlan add - add a new vlan filter entry¶

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.

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).

bridge vlan delete - delete a forwarding database entry¶

This command removes an existing fdb entry.

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

bridge vlan show - list vlan configuration.¶

This command displays the current VLAN filter table.