Tried solutions in similar posts like this and still not working.
My main and AP is a Linksys E8450. So what happens is the LAN and wifi speeds on the dumb ap is throttled to 95 up/down speed. On the main router it is 400down/414up on both wifi/lan normal operation.
But after I restart the Dumb ap, briefly for sometime I get the main router speeds of 400down/414up but after sometime it goes back to 95 up/down. NO hardware/software offloading enabled on both Linksys E8450.
MY SETTINGS
From DUMB AP
config interface 'loopback'
option device 'lo'
option proto 'static'
option ipaddr '127.0.0.1'
option netmask '255.0.0.0'
config globals 'globals'
option ula_prefix 'fdb2:a3a5:a353::/48'
config device
option name 'br-lan'
option type 'bridge'
list ports 'lan1'
list ports 'lan2'
list ports 'lan3'
list ports 'lan4'
list ports 'wan'
config interface 'lan'
option device 'br-lan.99'
option proto 'dhcp'
option delegate '0'
config interface 'wan'
option device 'wan'
option proto 'dhcp'
option delegate '0'
config bridge-vlan
option device 'br-lan'
option vlan '4'
list ports 'wan:t'
config bridge-vlan
option device 'br-lan'
option vlan '99'
list ports 'lan1:u*'
list ports 'wan:t'
config interface 'guest'
option proto 'dhcp'
option device 'br-lan.4'
option delegate '0'
Wireless DUMB AP
config wifi-device 'radio0'
option type 'mac80211'
option path 'platform/18000000.wmac'
option band '2g'
option htmode 'HT40'
option channel 'auto'
option country 'PA'
option cell_density '0'
option txpower '28'
config wifi-iface 'default_radio0'
option device 'radio0'
option network 'lan'
option mode 'ap'
option ssid 'M4'
option encryption 'psk2'
option key '9884750176_'
option ieee80211r '1'
option mobility_domain '789D'
option ft_over_ds '0'
option ft_psk_generate_local '1'
config wifi-device 'radio1'
option type 'mac80211'
option path '1a143000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0'
option band '5g'
option htmode 'HE160'
option channel 'auto'
option cell_density '0'
option he_su_beamformee '1'
option he_bss_color '8'
option country 'US'
config wifi-iface 'default_radio1'
option device 'radio1'
option network 'lan'
option mode 'ap'
option ssid 'Madan'
option encryption 'psk2'
option key '4^Mz23uJv_Mm'
option ieee80211r '1'
option mobility_domain '123F'
option ft_over_ds '0'
option ft_psk_generate_local '1'
config wifi-iface 'wifinet2'
option device 'radio1'
option mode 'ap'
option ssid 'Madan+'
option encryption 'psk2'
option key '9884148280_'
option network 'guest'
option ieee80211r '1'
option mobility_domain '321F'
option ft_over_ds '0'
option ft_psk_generate_local '1'
config wifi-iface 'wifinet3'
option device 'radio0'
option mode 'ap'
option ssid 'Madan+'
option encryption 'psk2'
option key '9884148280_'
option network 'guest'
option ieee80211r '1'
option mobility_domain '321F'
option ft_over_ds '0'
option ft_psk_generate_local '1'
FROM MAIN ROUTER
config interface 'loopback'
option device 'lo'
option proto 'static'
option ipaddr '127.0.0.1'
option netmask '255.0.0.0'
config globals 'globals'
option ula_prefix 'fd47:a1a1:d04d::/48'
config device
option name 'br-lan'
option type 'bridge'
list ports 'lan1'
list ports 'lan2'
list ports 'lan3'
list ports 'lan4'
config interface 'lan'
option proto 'static'
option netmask '255.255.255.0'
option ipaddr '192.168.86.1'
option device 'br-lan.99'
option delegate '0'
config interface 'wan'
option device 'wan'
option proto 'pppoe'
option password 'QSSC14ft'
option ipv6 'auto'
option delegate '0'
option username '103643018287'
config interface 'guest'
option proto 'static'
option ipaddr '192.168.87.1'
option netmask '255.255.255.0'
option device 'br-lan.4'
option delegate '0'
config bridge-vlan
option device 'br-lan'
option vlan '4'
list ports 'lan4:t'
config bridge-vlan
option device 'br-lan'
option vlan '99'
list ports 'lan2:u*'
list ports 'lan3:u*'
list ports 'lan4:t'
MAIN ROUTER WIRELESS
config wifi-device 'radio0'
option type 'mac80211'
option path 'platform/18000000.wmac'
option band '2g'
option htmode 'HT40'
option channel 'auto'
option cell_density '0'
option txpower '28'
option country 'PA'
config wifi-iface 'default_radio0'
option device 'radio0'
option network 'lan'
option mode 'ap'
option encryption 'psk2'
option ssid 'M4'
option key '9884750176_'
option ieee80211r '1'
option mobility_domain '789D'
option ft_over_ds '0'
option ft_psk_generate_local '1'
config wifi-device 'radio1'
option type 'mac80211'
option path '1a143000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0'
option band '5g'
option htmode 'HE160'
option cell_density '0'
option channel 'auto'
option he_su_beamformee '1'
option he_bss_color '8'
option country 'US'
config wifi-iface 'default_radio1'
option device 'radio1'
option network 'lan'
option mode 'ap'
option ssid 'Madan'
option key '4^Mz23uJv_Mm'
option encryption 'psk2'
option ieee80211r '1'
option mobility_domain '123F'
option ft_over_ds '0'
option ft_psk_generate_local '1'
config wifi-iface 'wifinet3'
option device 'radio1'
option mode 'ap'
option ssid 'Madan+'
option encryption 'psk2'
option key '9884148280_'
option network 'guest'
option ieee80211r '1'
option mobility_domain '321F'
option ft_over_ds '0'
option ft_psk_generate_local '1'
config wifi-iface 'wifinet4'
option device 'radio0'
option mode 'ap'
option ssid 'Madan+'
option encryption 'psk2'
option key '9884148280_'
option network 'guest'
option ieee80211r '1'
option mobility_domain '321F'
option ft_over_ds '0'
option ft_psk_generate_local '1'