An odd and very specific problem on a GL-iNET SFT1200 router running OpenWrt 18.06.
On the router's 2.4 GHz interface (wlan1), I am trying to connect to a WiFi camera adapter, which acts as a WiFi AP with SSID "WIFIAV-HD." Most of my devices connect to this adapter with no issues. Its IP address is fixed as 192.168.99.1. I have no way to change any WiFi parameters on this adapter.
The GL-iNET router is able to connect as a Client to "WIFIAV-HD" and receive an IP address over DHCP. But for some reason, I can't ping the adapter from the router. It appears that the router's ARP requests are going unanswered. The requests are being sent over the right interface (confirmed with tcpdump), but no response.
root@GL-SFT1200:~# arp
IP address HW type Flags HW address Mask Device
192.168.8.126 0x1 0x0 00:00:00:00:00:00 * br-lan
192.168.8.5 0x1 0x2 00:68:eb:8e:d2:53 * br-lan
192.168.99.1 0x1 0x0 00:00:00:00:00:00 * wlan1
root@GL-SFT1200:~# tcpdump --interface=wlan1 -n
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on wlan1, link-type EN10MB (Ethernet), capture size 262144 bytes
05:11:35.547208 ARP, Request who-has 192.168.99.1 tell 192.168.99.2, length 28
05:11:36.579806 ARP, Request who-has 192.168.99.1 tell 192.168.99.2, length 28
05:11:37.620281 ARP, Request who-has 192.168.99.1 tell 192.168.99.2, length 28
...
I've reset the router to a "clean" configuration, but this didn't help. The router has no trouble acting as a client on other 2.4 GHz networks. And every other device I have has no issues connecting to the camera adapter and pinging it afterwards. Here's my Windows box, pinging away:
C:\WINDOWS\system32>ping 192.168.99.1
Pinging 192.168.99.1 with 32 bytes of data:
Reply from 192.168.99.1: bytes=32 time=1ms TTL=255
Reply from 192.168.99.1: bytes=32 time=1ms TTL=255
Reply from 192.168.99.1: bytes=32 time=1ms TTL=255
Config files below.
/etc/config/wireless:
root@GL-SFT1200:/etc/config# cat wireless
config wifi-device 'radio0'
option type 'mac80211'
option txpower '25'
option txpower_max '25'
option channel 'auto'
option band '5G'
option hwmode '11a'
option noscan '0'
option netisolate '0'
option max_all_num_sta '64'
option path 'platform/17800000.wifi-hb'
option htmode 'VHT80'
option disabled '0'
option country 'US'
option acs_noradar '1'
config wifi-iface 'default_radio0'
option device 'radio0'
option network 'lan'
option mode 'ap'
option hidden '0'
option ifname 'wlan0'
option wpa_group_rekey '36000'
option isolate '0'
option group '1'
option disable_input '0'
option wps_pushbutton '1'
option wps_label '0'
option ssid 'GL-SFT1200-51f-5G'
option encryption 'psk2'
option key 'goodlife'
option disassoc_low_ack '0'
option wds '1'
option disabled '1'
config wifi-device 'radio1'
option type 'mac80211'
option txpower '20'
option txpower_max '20'
option band '2.4G'
option hwmode '11g'
option netisolate '0'
option max_all_num_sta '64'
option path 'platform/11000000.wifi-lb'
option htmode 'HT40'
option country 'US'
option channel '1'
option legacy_rates '1'
option __toggle 'Enable'
config wifi-iface 'default_radio1'
option device 'radio1'
option network 'lan'
option mode 'ap'
option hidden '0'
option ifname 'wlan1'
option wpa_group_rekey '36000'
option isolate '0'
option group '1'
option disable_input '0'
option wps_pushbutton '1'
option wps_label '0'
option ssid 'GL-SFT1200-51f'
option encryption 'psk2'
option key 'goodlife'
option wds '1'
option disassoc_low_ack '0'
option disabled '1'
config wifi-iface 'guest5g'
option device 'radio0'
option network 'guest'
option mode 'ap'
option wds '1'
option ssid 'GL-SFT1200-51f-Guest-5G'
option encryption 'psk2'
option key 'goodlife'
option ifname 'wlan2'
option disabled '1'
option guest '1'
option disassoc_low_ack '0'
config wifi-iface 'guest2g'
option device 'radio1'
option network 'guest'
option mode 'ap'
option wds '1'
option ssid 'GL-SFT1200-51f-Guest'
option encryption 'psk2'
option key 'goodlife'
option ifname 'wlan3'
option disabled '1'
option guest '1'
option disassoc_low_ack '0'
config wifi-iface
option network 'wlan1'
option ssid 'WIFIAV-HD'
option encryption 'psk2'
option device 'radio1'
option mode 'sta'
option bssid 'A0:9F:10:E1:16:17'
option key '12345678'
option ifname 'wlan1'
/etc/config/network
config interface 'loopback'
option ifname 'lo'
option proto 'static'
option ipaddr '127.0.0.1'
option netmask '255.0.0.0'
config globals 'globals'
option ula_prefix 'fde2:9a50:a6ca::/48'
config interface 'lan'
option type 'bridge'
option ifname 'eth0.1'
option proto 'static'
option ipaddr '192.168.8.1'
option netmask '255.255.255.0'
option ip6assign '60'
option hostname 'GL-SFT1200-51f'
config device 'lan_dev'
option name 'eth0.1'
option macaddr '94:83:c4:23:35:20'
config interface 'wan'
option ifname 'eth0.2'
option proto 'dhcp'
option hostname 'GL-SFT1200-51f'
option ipv6 '0'
option metric '10'
config device 'wan_dev'
option name 'eth0.2'
option macaddr '94:83:c4:23:35:1f'
config interface 'wan6'
option ifname 'eth0.2'
option proto 'dhcpv6'
option disabled '1'
config interface 'guest'
option ifname 'guest'
option type 'bridge'
option proto 'static'
option netmask '255.255.255.0'
option group '0'
option forcelink '1'
option ipaddr '192.168.9.1'
option ip6assign '60'
config switch
option name 'switch0'
option reset '1'
option enable_vlan '1'
config switch_vlan
option device 'switch0'
option vlan '1'
option ports '1 2 3 5t'
config switch_vlan
option device 'switch0'
option vlan '2'
option ports '0 5t'
config switch_port
option device 'switch0'
option port '5'
option pvid '2'
config interface 'wlan1'
option proto 'dhcp'
