Olá,
Não tenho certeza agora se vai funcionar em subinterface, mas tenta o script abaixo:
access-list 100 remark -----[ Limita banda em 1024k \ Wireless ]
access-list 100 permit ip any 172.16.107.0 0.0.0.255
access-list 100 permit ip 172.16.107.0 0.0.0.255 any
rate-limit input access-group 100 1024000 512000 1024000 conform-action transmit exceed-action drop
rate-limit output access-group 100 1024000 512000 1024000 conform-action transmit exceed-action drop