brctl_showmacs

root@OpenWrt:~# brctl_showmacs () { printf "port no\tmac addr\t\tis local?\tageing timer\n" ; hexdump -v -e '5/1 "%02x:" /1 "%02x" /1 " %x" /1 " %x" 1/4 " %i" 1/4 "\n"' /sys/class/net/$1/brforward | awk '{ islocal = $3 ? "yes" : "no" ; printf "%3i\t%s\t%s\t\t%8.2f\n",$2,$1,islocal,$4/100 } ' ; }
root@OpenWrt:~# brctl_showmacs br-lan
port no	mac addr		is local?	ageing timer
  3	a0:f3:c1:86:16:2b	no		    0.42
  3	d0:e7:82:09:70:4f	no		    1.45
  3	a0:f3:c1:86:04:5d	no		    1.96
  3	b2:59:98:74:ed:77	yes		    0.00
  3	00:73:e0:75:4d:24	no		  266.91
  3	b0:48:7a:8f:9d:17	no		    1.17
  3	a0:e4:53:cd:50:0e	no		    2.37
  3	a0:f3:c1:86:10:b7	no		    0.36
  3	64:b3:10:e1:f6:77	no		    6.69
  3	90:f6:52:04:f9:8e	no		    0.67
  3	00:c1:05:02:21:19	no		    3.31
  3	c2:4a:00:fc:39:c1	no		    2.26
  3	a0:f3:c1:86:14:d3	no		    1.23
  3	a0:f3:c1:86:16:b9	no		    2.24
  3	e8:94:f6:47:c0:59	no		    0.49
  3	10:08:c1:60:5e:8e	no		   22.72
  3	e8:94:f6:47:c2:d5	no		    0.01
  3	90:f6:52:19:37:3a	no		    0.17
  3	a0:f3:c1:86:03:b3	no		    0.90
  2	c0:4a:00:fc:39:c0	yes		    0.00
  2	74:f0:6d:22:b7:54	no		    0.01
  3	54:9b:12:37:3a:ca	no		  132.96
  3	08:fc:88:1f:5b:b5	no		   14.83
  3	e8:94:f6:47:c5:47	no		    0.56
  3	f4:ec:38:d2:76:6c	no		    0.26
  3	a0:f3:c1:86:14:ed	no		    1.66
  3	70:05:14:6b:35:12	no		  258.82
  3	e8:94:f6:47:ad:35	no		    0.93
  3	64:70:02:44:6d:31	no		    0.77
  3	a0:f3:c1:86:15:17	no		    2.34
  3	48:5d:60:17:ca:52	no		   68.26
  3	00:15:6d:a6:fc:49	no		   10.47
  2	f8:d0:bd:bd:c4:5e	no		    2.88
  2	74:e5:0b:44:71:d6	no		    0.01
  3	94:35:0a:43:79:04	no		   86.15
  3	a0:f3:c1:86:03:f7	no		    0.78
  3	70:f1:a1:ae:24:ce	no		   51.79
  3	a0:f3:c1:86:01:1b	no		    0.67
  3	78:92:9c:b6:c2:24	no		    7.24
  3	80:9b:20:e7:b4:68	no		   13.67
  3	78:92:3e:93:e3:bf	no		   15.19
  2	00:23:14:5c:f7:4c	no		    0.01
  3	a0:f3:c1:86:14:c1	no		    1.75
  3	80:9b:20:e8:32:3c	no		  245.82
  3	a0:f3:c1:86:14:87	no		    2.94
  2	00:23:14:5d:5a:48	no		    0.18
  3	a0:f3:c1:86:14:7f	no		    0.87
  2	18:87:96:13:43:ba	no		    1.31
  3	e8:94:f6:47:c4:d7	no		    1.82
  3	a0:f3:c1:86:14:47	no		    1.02
  1	c0:4a:00:fc:39:bf	yes		    0.00
  3	a0:f3:c1:86:14:5d	no		    0.71
  3	64:70:02:4e:c4:c5	no		    0.61
root@OpenWrt:~# brctl show
bridge name	bridge id		STP enabled	interfaces
br-lan		7fff.c04a00fc39bf	no		eth0
							wlan0
							bat0
root@OpenWrt:~# brctl_showmacs br-lan |egrep '^\W*2'
  2	c0:4a:00:fc:39:c0	yes		    0.00
  2	74:f0:6d:22:b7:54	no		    2.01
  2	f8:d0:bd:bd:c4:5e	no		    8.73
  2	74:e5:0b:44:71:d6	no		    0.02
  2	00:23:14:5c:f7:4c	no		    0.01
  2	00:23:14:5d:5a:48	no		    0.17
  2	18:87:96:13:43:ba	no		    5.34