Vreemd, het script/de handleiding was toch gemaakt voor deze router? Zijn er dan meerdere soorten RT-AC87U-routers?
Daarnaast lijkt de br0 wel te bestaan. Als ik met ifconfig -a kijk, dan zie ik dit:
admin@ASUS:/tmp/home/root# ifconfig -a
br0 Link encap:Ethernet HWaddr 14:DD:A9:CB:82:B8
inet addr:192.168.1.1 Bcast:192.168.1.255 Mask:255.255.255.0
UP BROADCAST RUNNING ALLMULTI MULTICAST MTU:1500 Metric:1
RX packets:1045398 errors:0 dropped:0 overruns:0 frame:0
TX packets:1512154 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:157138837 (149.8 MiB) TX bytes:1618686004 (1.5 GiB)
br0:0 Link encap:Ethernet HWaddr 14:DD:A9:CB:82:B8
inet addr:169.254.39.99 Bcast:169.254.39.255 Mask:255.255.255.0
UP BROADCAST RUNNING ALLMULTI MULTICAST MTU:1500 Metric:1
eth0 Link encap:Ethernet HWaddr 14:DD:A9:CB:82:B8
inet addr:192.168.2.1 Bcast:192.168.2.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:4122797 errors:0 dropped:0 overruns:0 frame:0
TX packets:1819042 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:225828087 (215.3 MiB) TX bytes:472504473 (450.6 MiB)
Interrupt:180 Base address:0x5000
eth1 Link encap:Ethernet HWaddr 14:DD:A9:CB:82:B8
UP BROADCAST RUNNING ALLMULTI MULTICAST MTU:1500 Metric:1
RX packets:1521658 errors:0 dropped:0 overruns:0 frame:175721
TX packets:3858422 errors:3283 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:328149829 (312.9 MiB) TX bytes:13599340 (12.9 MiB)
Interrupt:163
ifb0 Link encap:Ethernet HWaddr 0A:BE:98:AA:FD:7C
BROADCAST NOARP MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:32
RX bytes:0 (0.0

TX bytes:0 (0.0
ifb1 Link encap:Ethernet HWaddr 8E:AB:BB:62:C5:90
BROADCAST NOARP MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:32
RX bytes:0 (0.0

TX bytes:0 (0.0
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
UP LOOPBACK RUNNING MULTICAST MTU:16436 Metric:1
RX packets:272985 errors:0 dropped:0 overruns:0 frame:0
TX packets:272985 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:59084470 (56.3 MiB) TX bytes:59084470 (56.3 MiB)
vlan1 Link encap:Ethernet HWaddr 14:DD:A9:CB:82:B8
UP BROADCAST RUNNING ALLMULTI MULTICAST MTU:1500 Metric:1
RX packets:662022 errors:0 dropped:0 overruns:0 frame:0
TX packets:811565 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:99019843 (94.4 MiB) TX bytes:291421620 (277.9 MiB)
vlan2 Link encap:Ethernet HWaddr 14:DD:A9:CB:82:B8
BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0

TX bytes:0 (0.0
vlan4 Link encap:Ethernet HWaddr 14:DD:A9:CB:82:B8
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:5094 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0

TX bytes:1762524 (1.6 MiB)
wl0.1 Link encap:Ethernet HWaddr 14:DD:A9:CB:82:B9
UP BROADCAST RUNNING ALLMULTI MULTICAST MTU:1500 Metric:1
RX packets:27614 errors:0 dropped:0 overruns:0 frame:175721
TX packets:104674 errors:3 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:3494709 (3.3 MiB) TX bytes:81791334 (78.0 MiB)