Entah mengapa tadi kepikiran untuk jalankan ifconfig -a. Ternyata kemudian ada output yang menarik
eth0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
ether c8:5b:76:66:51:6a txqueuelen 1000 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
inet 127.0.0.1 netmask 255.0.0.0
inet6 ::1 prefixlen 128 scopeid 0x10<host>
loop txqueuelen 1000 (Local Loopback)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
wlan1: flags=4098<BROADCAST,MULTICAST> mtu 1500
ether ca:b0:da:b5:3d:75 txqueuelen 1000 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
Menariknya adalah angka index interface-nya. Semua 0 kecuali wlan yang 1 sendiri. Sebenarnya no problem sih, cuma ga sedap dipandang aja. Kalau indexnya kompak 0 kan cakep. Hahahaha…..
Penelusuran mengapa interface-nya wlan1 bukan wlan0
$ cat /etc/udev/rules.d/70-persistent-net.rules
# PCI device 0x10ec:/sys/devices/pci0000:00/0000:00:1c.3/0000:03:00.0 (r8169)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="c8:5b:76:66:51:6a", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"
# PCI device 0x168c:/sys/devices/pci0000:00/0000:00:1c.2/0000:02:00.0 (ath10k_pci)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="ca:b0:da:b5:3d:75", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="wlan*", NAME="wlan0"
# PCI device 0x168c:/sys/devices/pci0000:00/0000:00:1c.2/0000:02:00.0 (ath10k_pci)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="ca:b0:da:b5:3d:75", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="wlan*", NAME="wlan1"
# USB device 0x0cf3:0x9271 (usb)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="84:16:f9:18:92:40", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="wlan*", NAME="wlan2"
Ternyata 1 device dengan address (ca:b0:da:b5:3d:75) diberi 2 nama yaitu wlan0 dan wlan1. Ya sudah yang wlan1 dikomen aja. Beres.