MikroTik RouterOS™ v2.9

To group ether1 and ether2 in the already created bridge1 bridge (versions before 2.9.9):
[admin@MikroTik] interface bridge port> set ether1,ether2 bridge=bridge1
[admin@MikroTik] interface bridge port> print
# INTERFACE BRIDGE PRIORITY PATH-COST
0 ether1 bridge1 128 10
1 ether2 bridge1 128 10
2 wlan1 none 128 10
[admin@MikroTik] interface bridge port>
To group ether1 and ether2 in the already created bridge1 bridge (versions from 2.9.9):
[admin@MikroTik] interface bridge port> add ether1,ether2 bridge=bridge1
[admin@MikroTik] interface bridge port> print
# INTERFACE BRIDGE PRIORITY PATH-COST
0 ether1 bridge1 128 10
1 ether2 bridge1 128 10
[admin@MikroTik] interface bridge port>
Note that there is no wlan1 interface anymore, as it is not added as bridge port.
Bridge Monitoring
Command name: /interface bridge monitor
Description
Used to monitor the current status of a bridge.
Property Description
bridge-id (text) - the bridge ID, which is in form of bridge-priority.bridge-MAC-address
designated-root (text) - ID of the root bridge
path-cost (integer) - the total cost of the path to the root-bridge
root-port (name) - port to which the root bridge is connected to
Example
To monitor a bridge:
[admin@MikroTik] interface bridge> monitor bridge1
bridge-id: 32768.00:02:6F:01:CE:31
designated-root: 32768.00:02:6F:01:CE:31
root-port: ether2
path-cost: 180
[admin@MikroTik] interface bridge>
Bridge Port Monitoring
Command name: /interface bridge port monitor
Description
Statistics of an interface that belongs to a bridge
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