NAME ] bridge mdb show [ dev DEV ] bridge vlan { add | del } dev DEV vid VID [ pvid ] [ untagged ] [ self ] [ master ] bridge vlan [ show ] [ dev DEV ] bridge monitor [ all | neigh | link | mdb ]
OPTIONS
-V, -Version print the version of the bridge utility and exit. -s, -stats, -statistics output more information. If this option is given multiple times, the amount of information increases. As a rule, the information is statistics or some time values. -n, -net, -netns <NETNS> switches bridge to the specified network namespace NETNS. Actually it just simplifies executing of: ip netns exec NETNS bridge [ OPTIONS ] OBJECT { COMMAND | help } to bridge -n[etns] NETNS [ OPTIONS ] OBJECT { COMMAND | help } -b, -batch <FILENAME> Read commands from provided file or standard input and invoke them. First failure will cause termination of bridge command. -force Don't terminate bridge command on errors in batch mode. If there were any errors during execution of the commands, the application return code will be non zero.
BRIDGE - COMMAND SYNTAX
OBJECT link - Bridge port. fdb - Forwarding Database entry. mdb - Multicast group database entry. vlan - VLAN filter list..
bridge link - bridge port
link objects correspond to the port devices of the bridge. The corresponding commands set and display port status and bridge specific attributes. 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. 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 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. 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. flooding on or flooding. 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. bridge link show - list bridge port configuration. This command displays the current bridge port configuration and flags.
bridge fdb - forwarding database management
fdb objects contain known Ethernet addresses on a link. The corresponding commands display fdb entries, add new entries, append entries, and delete old ones. 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.. 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 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 - multicast group database management
mdb objects contain known IP multicast group addresses on a link. The corresponding commands display mdb entries, add new entries, and delete old ones. 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) vid VID the VLAN ID which is known to have members of this multicast group. 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.
bridge vlan - VLAN filter list
vlan objects contain known VLAN IDs for a link. The corresponding commands display vlan filter entries, add new entries, and delete old ones. 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.
bridge monitor - state monitoring
The bridge utility can monitor the state of devices and addresses continuously. This option has a slightly different format. Namely, the monitor command is the first in the command line and then the object list follows: bridge monitor [ all | OBJECT-LIST ] OBJECT-LIST is the list of object types that we want to monitor. It may contain link, fdb, and mdb. If no file argument is given, bridge.
NOTES
This command uses facilities added in Linux 3.0. Although the forwarding table is maintained on a per-bridge device basis the bridge device is not part of the syntax. This is a limitation of the underlying netlink neighbour message protocol. When displaying the forwarding table, entries for all bridges are displayed. Add/delete/modify commands determine the underlying bridge device based on the bridge to which the corresponding ethernet device is attached.
SEE ALSO
ip(8)
BUGS
Please direct bugreports and patches to: <netdev@vger.kernel.org>
AUTHOR
Original Manpage by Stephen Hemminger