为什么 Linux 网桥显示本地接口的两个 MAC 地址条目？
brctl showmacs bridge1
port no mac addr is local? ageing timer
1 0c:b4:7a:f5:36:b6 no 23.90
1 0c:b4:7a:f5:37:3b no 19.58
1 0c:a4:7a:f9:d7:04 yes 0.00
1 0c:a4:7a:f9:d7:04 yes 0.00
10 fe:c4:00:ab:d5:18 yes 0.00
10 fe:c4:00:ab:d5:18 yes 0.00