Mikrotik gateway full speed access

Hi,

Thanks for the experts for giving the great solutions to learners

iam using hotspot service speeds like 256Kbps 512 kbps etc

when ever user reaches to full speed iam not able to ping the mikrotik hotspot out interface i.e., Gateway to the clients

I want to restrict the speed for only the contents not the gateway ping etc
Please help me to gain full access for pinging the gateway i.e hotspot interface

Thanks,
Sathish