OK, luckily I also have a BT Home Hub 5A:
root@OpenWrt:~# cat /proc/cpuinfo
system type : xRX200 rev 1.2
machine : BT Home Hub 5A
I manually created the same configuration I used on WNDR:
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 'fd52:b7ae:2826::/48'
config atm-bridge 'atm'
option vpi '1'
option vci '32'
option encaps 'llc'
option payload 'bridged'
option nameprefix 'dsl'
config dsl 'dsl'
option annex 'a'
option tone 'av'
option ds_snr_offset '0'
config interface 'lan'
option type 'bridge'
option ifname 'eth0.1'
option proto 'static'
option netmask '255.255.255.0'
option ip6assign '60'
option gateway '192.168.100.128'
option ipaddr '192.168.99.128'
list dns '192.168.100.128'
config device 'lan_eth0_1_dev'
option name 'eth0.1'
option macaddr '18:62:2c:3d:a1:8c'
config device 'wan_dsl0_dev'
option name 'dsl0'
option macaddr '18:62:2c:3d:a1:8d'
config switch
option name 'switch0'
option reset '1'
option enable_vlan '1'
config switch_vlan
option device 'switch0'
option vlan '1'
option ports '0 1 2 4 6t'
config switch_vlan
option device 'switch0'
option vlan '2'
option ports '5 6t'
config interface 'wlan'
option proto 'static'
option netmask '255.255.255.0'
list dns '192.168.100.128'
option ipaddr '192.168.100.83'
option gateway '192.168.100.128'
config interface 'stabridge'
option proto 'relay'
list network 'lan'
list network 'wlan'
option ipaddr '192.168.100.83'
--
config wifi-device 'radio0'
option type 'mac80211'
option channel '36'
option hwmode '11a'
option path 'pci0000:01/0000:01:00.0/0000:02:00.0'
option htmode 'VHT80'
config wifi-device 'radio1'
option type 'mac80211'
option channel '11'
option hwmode '11g'
option path 'pci0000:00/0000:00:0e.0'
option htmode 'HT20'
option disabled '1'
config wifi-iface 'wifinet0'
option ssid '***'
option device 'radio0'
option mode 'sta'
option key '***'
option network 'wlan'
option encryption 'psk2'
and guess what? exact same problem! normal traffic works, DHCP doesn't!
OpenWrt 19.07.0
could you please share your working HH 5A configuration and the version of OpenWRT you are using.
I am also using 5GHz only.
BTW HH 5A is supposed to be a much more powerful router with 802.1ac and everything. but the bridged transfer rate is mere 5MBytes/s compared to WNDR's 13MBytes/s. go figure.
thanks again.