[admin@MikroTik] > interface ethernet pr
修改前
Flags: X - disabled, R - running
# NAME MTU MAC-ADDRESS ARP
0 R ether1 1500 00:11:22:33:44:55 enabled
1 R ether2 1500 00:08:02:B3:FC:99 enabled
2 R ether3 1500 00:E0:81:02:21:BF enabled
3 R ether4 1500 00:E0:81:02:21:C0 enabled
[admin@MikroTik] > interface ethernet set 2 mac-address=00:11:22:33:44:56
注释：把编号为2的网卡的MAC地址改为：00:11:22:33:44:56
[admin@MikroTik] > interface ethernet pr
查看修改后结果
Flags: X - disabled, R - running
# NAME MTU MAC-ADDRESS ARP
0 R ether1 1500 00:11:22:33:44:55 enabled
1 R ether2 1500 00:08:02:B3:FC:99 enabled
2 R ether3 1500 00:11:22:33:44:56 enabled
3 R ether4 1500 00:E0:81:02:21:C0 enabled
[admin@MikroTik] >
这个办法很少人知道，实用的。