Hi , 

   I am using MPC8247 on a custom board , with FCC2 and SCC4 for ethernet and scc2 for serial console , 

if increase buffer descirptor size from 4 to 8 ,, kernel panics after some pings ,, increasing number of buffer diesciptor should not ne a problem , as far as i know , correct me if i am wrong . or there something else i should look into. please guide 
thanks A Lot In Advance 

Rgerds
Neelu