Brctl

brctl commands allows ethernet bridge administration in Linux. It is included in bridge-utils package in Ubuntu.

• brctl addif

Commands

brctl show
bridge name	bridge id		STP enabled	interfaces
virbr0		8000.325400810bc6	yes		virbr0-nic

brctl show
bridge name	bridge id		STP enabled	interfaces
docker0        8000.02424a095b68	no
virbr0		8000.525400118b5a	yes		virbr0-nic

bridge name	bridge id		STP enabled	interfaces
docker0		8000.02429250bfb7	no		
virbr0		8000.525400a300b0	yes		virbr0-nic
virbr1		8000.525400999cef	yes		virbr1-nic

brctl
Usage: brctl [commands]
commands:
	addbr     	<bridge>		add bridge
	delbr     	<bridge>		delete bridge
	addif     	<bridge> <device>	add interface to bridge
	delif     	<bridge> <device>	delete interface from bridge
	hairpin   	<bridge> <port> {on|off}	turn hairpin on/off
	setageing 	<bridge> <time>		set ageing time
	setbridgeprio	<bridge> <prio>		set bridge priority
	setfd     	<bridge> <time>		set bridge forward delay
	sethello  	<bridge> <time>		set hello time
	setmaxage 	<bridge> <time>		set max message age
	setpathcost	<bridge> <port> <cost>	set path cost
	setportprio	<bridge> <port> <prio>	set port priority
	show      	[ <bridge> ]		show a list of bridges
	showmacs  	<bridge>		show a list of mac addrs
	showstp   	<bridge>		show bridge stp info
	stp       	<bridge> {on|off}	turn stp on/off

Related commands

• virsh net-info
• virsh net-edit
• virbr, ens
• MacVTap virtualized bridged networking
• Multipass bridged support

See also

• KVM: virsh net-list
• STP Spanning Tree Protocol
• Bridge, ebtables, brctl, Open vSwitch (OVS)
• Ethernet: MII, MDI, bonding, etherchannel, STP, ARP, MAC, STP, Jumbo frames, 802.1X, MTU, Ethernet In-Band Access (IBA), LACP, Multicast, Broadcast, SPI

https://linux.die.net/man/8/brctl